Dr. A. Vaughan on Seaiinula. I'Jl 



Soc, Garb. Bracli. p. 78) in explanation of the fact that he 

 queried his own a.sso: tion that 7'er. pentaedrUy Pliill. was a 

 synonym of Sj'irij'er ainh'ujuus^ iSow.]. 



Terehratula seminula^ Phillips, Geology of Yorkshire, pt. '1, 

 pi. xii. fiirs. 21, 22, 23. 



Since M'Coy himself, in his ' PaUvozoic Fossils ' (185")), 

 subsequently stated that this species was the ty|)e of Seini- 

 nula, 1 also examined the sj)ecimens which are assigned to 

 this species in the Gilbertson Collection. 



From the catalogue of the collection it appears that there 

 were originally titteen specimens ; there are now only ten, 

 and one of these is a small iSpiritVrid. The remaining nine 

 all obviously belong to the same s[)ecies and are closely 

 related to Camaroplioria glohulina, at least generically. 

 (Davidson t very justly draws attention to the presence of a 

 strong mesial septum in the pedicle-valve, visible through the 

 test.) 



It cannot be reasonably doubted that the specimen actually 

 figured by Phillips (fig. 21, loc. cit.) had the same general 

 characters, although none of the actual nine specimens can 

 be detinitely considered to agree with his figure. 



Hence, in all probability, and as Davidson stated, the type 

 of Terehratula seminula, Phill., is a Camarophoria (so long 

 only as that genus continues to include Terebratula c/lubulina, 

 Phillips). 



COMPOSITA, Brown. 



As Mr. Buckman has pointed out, Brown states very 

 definitely that " the genus [i. e. Gomposita] is founded 

 upon the Spirifer amhiijuus of Sowerby." Unfortunately it 

 is equally clt^ar that Brown had an erroneous conception of 

 Sowerby's species, for his figures of Composita amhujua 

 (' Fossil Conchology ' (1840), pi. liv.'^ figs. 4 & 5) represent 

 Spirijer {Martinia) glaher (Martin), and not iSowerby's 

 Species, Spirifer amhiguus. 



Brown's figure exhibits the following differences from 

 the holotype \ of Spirifer amhiguus, iSow. : — 



(1) Large size : the figure measures 1""2 x 1", very un- 

 usual dimensions for a Semi/iula. 



t Loc. cif. p. IIG. 



X This holotype, which is represented in the two uppermost figures on 

 pi. ccd.vxvi. Mill. Conch,, is a small double-valved specimen, piojcrved 

 in the Sowerby Collection in the IJritish Museum. The other two iigures 

 of the plate depict a very imperfect pedicle-valve and a mere frajrment of 

 a brachial valve, neither of which can be accepted as adequate definition 

 of a sjiecies. 



