Dear Colleagues,
  I am incompetent in IT matters. As a result I sent  my reply to Prof.
Tsuda only, as he kindly tells me.
  I hope this message  sends it to everybody.
                                           Best wishes,
                                             Dick Jefferies

>Date: Tue, 28 Nov 2000 10:26:52 +0900
>To: Richard Jefferies <[log in to unmask]>
>From: =?ISO-2022-JP?B?GyRCREVFRDRwRzcbKEI=?= <[log in to unmask]>
>Subject: Re: Fwd: Re: adult photoreceptors
>
>Dear Dick
> Thank you very much for your mail. It help me very much. I found this mail
>sent to my mail address, but not [log in to unmask]  Many tunicata
>colleagues may want to know your mail. Please send it to colleagues.
>Motoyuki
>
>
>
>At 11:35 AM +0000 00.11.27, Richard Jefferies wrote:
>> Dear Motoyuki and colleagues,
>>    As regards what Froriep said, and with all due modesty, I shall quote a
>> paragraph from pp. 106-7 of my book (Jefferies, R. P. S. 1986. The ancestry
>> of the vertebrates. British Museum (Natural History) & Cambridge).
>>    "A paper by Froriep (1906) seems to have been entirely forgotten. In late
>> tadpoles of the tunicate Distaplia Froriep found that the definitive
>> ganglion and the neural gland and its duct were already well developed and
>> exactly median in position (Fig. 4.28a, b). The cerebral or sensory vesicle
>> with its ocellus was situated right of the definitive ganglion and neural
>> gland. Left of the gland was an upward process of the brain which Froriep
>> saw as a reduced antimere of the sensory vesicle. He therefore interpreted
>> the sensory vesicle as homologous with the right eye of a vertebrate and the
>> supposed left antimere as homologous with the left eye of a vertebrate. This
>> result was mentioned by MacBride (1914) but without giving a reference.
>> Grave (1922) could find no trace of any left eye in the tadpole of
>> Amaroucium but, though aware of MacBride's statement, he was working in
>> ignorance of Froriep's paper. Froriep was a brilliant anatomist and a
>> careful observer, and the question of whether this vestigial eye exists
>> ought to be restudied."
>>   I also reproduced (1986, p. 109) copies  of Froriep's two figures for his
>> paper, representing a transverse and a longitudinal section of the relevant
>> parts of Distaplia. I shall send a  xerocopy of p. 109 to  Prof. Tsuda
>> (though I cannot undertake to do so for all 150 of you).    The book is out
>> of print,  by the way (at last),  though I believe there are several copies
>> in Japan.
>>   I might also mention that in the same book I give a preliminary discussion
>> of the  stem-group of the tunicates (pp. 308-315), with reference to the
>> Ordovician fossils, sometimes quite abundant, of the mitrates  Peltocystis,
>> Balanocystites and Anatifopsis.
>>   Recently Patricio Dominguez, from the Universidad Complutense in Madrid,
>> has started work on the tunicate mitrates  with me in London, paid for the
>> Spanish government, so that this study will at last be completed.
>>                                                                 Best wishes,
>>                                                                Dick Jefferies
>>
>> *********************************
>>
>> Dr. R. P. S. Jefferies,
>> Department of Palaeontology,
>> The Natural History Museum,
>> Cromwell Rd.,
>> London,
>> SW7 5BD
>> Telephone Number:0207 942 5014
>> (Internationally 00 44 207 942 5014 )
>> Fax Number: 0207 942 5546
>> (Internationally 00 44 207 942 5546)
>>
>>
>
*********************************

Dr. R. P. S. Jefferies,
Department of Palaeontology,
The Natural History Museum,
Cromwell Rd.,
London,
SW7 5BD
Telephone Number:0207 942 5014
(Internationally 00 44 207 942 5014 )
Fax Number: 0207 942 5546
(Internationally 00 44 207 942 5546)