liU Dr. A. Vaiuglian on Somimila. 



lieavily suffused with Mack, exactly as in the case of black- 

 and-tan dogs. They are intermediate in colour between a 

 t\]ncal niouflon and a completely nielatiistic sport of that 

 species; and, be it noted, they coninionly produce perfectly 

 Mack lambs. 'Ihey furnish an instance of the tan beins^j 

 the halfway stage between white and black in organisms 

 assuming a black pelage. 



Convi'isely, as examples of the tan or red being tlie inter- 

 mediate stage between the normal and the albino sport, may 

 be cited yellow or " ginger" varieties of domestic cats, which 

 frequently at all events, and perhaps always, have the pads 

 of the feet pink instead of black ; and also red-haired blue- 

 eyed types of some Jews, whose colour Prof, lladdon speaks 

 of as a kind of minor albinism. In sujiport of this 1 may add 

 that in the ' Sketch' for Nov. 14th, li>()G, there was a photo- 

 graph of a Kaffir reported to have had a white skin, pale blue 

 eyes, and short, woolly, yellow hair. It is well known that 

 some wholly white, or ])art:ally white cats like Siamese have 

 blue eyes. Hence the blueness of the iris appears to be a 

 sign of albescence both in the human and the feline species. 



XXIII. — Seminula : a No te hi/ 

 Ahtmuu Vaughan, B.A., D.Sc, F.G.S. 



In tlie Ann. & Mag. Nat. Hist. ser. 7, vol. xviii.,Nov. 1906, 

 pp. 321-327, ]\lr. S. S. Buckman, F.G.S. questions the 

 accepted use of certain Carboniferous generic names and 

 suggests somewhat drastic alterations. 



He has, in the case of Seminuhi^ drawn attention to as 

 tiretty a taiJgle as pala^ontologi.sts have ever made, and I 

 have to acknowledge his very courteous aid in my attempt to 

 unravel it. 



I shall content myself with the statement of the results 

 which I have obtained from a careful examination of speci- 

 mens and figures at the British IMuseum, and, in this work, I 

 am under a ])l(^a?ant sense of obligation to Dr. F. A. Bather 

 and Mr. C. D. Sherborn. The question of priority in names 

 must be left to experts in nomenclature. 



Seminuijv. 



The genotype is stated by Mr. Buckman to be Terehratula 

 fenUi'edra^ Pliill., and in this opinion he has the support of 

 Hall & Claike and Schuchert. It is only necessary, there- 

 fore, to discover to what genus this species belongs. 



