Bruchiopod Nomenclature. 32-5 



]\Ialacol. Soc. vi. p. 358 (1905), aiul lie it was who directed 

 my attention to this work of Brown's. 



Davidson remarks (Carb. Uracil., Pal. Soc. 1S57, j). 78 n.) 

 " tiiat Sftirifer umbiyaus lias received no less than six 

 difVcrent generic a|)|)ellations.''' He overlooked Brown'd 

 term, whicli niakes seven ; and it had not then been given 

 the name (the eighth) it now passes by — Seminula — for 

 M'Coy did not mention it as one of his types. 



It; is, then, necessary to consider what is the type of 

 M'Coy's genus Seminula. Dall merely cites the three species 

 mentioned by M'Coy. Hall and Clarke say " '\^y\iQ Seminula 

 amhijua, Sowerby, sp.,'' which M'Coy did not mention. 

 Sehuehert says "Genotype Terehratulu pentcedra, Phillips, = 

 Athijris ambi<)ua (Phillips),''^ which may be a lapse for 

 (JSowerby). Now M'Coy has definitely indicated his own 

 genotype by giving a figure (p. 150, fig. 31), and this figure 

 is certainly T. pentaedra, Phillips. But Davidson, who was 

 more ready to combine than to separate, only united 2\ jjent- 

 oedra to T. amhigua with a query. One may reasonably feel 

 much doubt about the association when it is remembered 

 that Phillips kept the two species distinct and that M'Coy 

 classed with T. pentaedra as belonging to his Seminula two 

 species which are recognized now as Camarophoria. Further, 

 M'Coy says in regard to Seminula (p. 150) " perforation 

 minute." This is not a description that could be applied to 

 T. aiublgua. 



A glance at Phillips's original figure shoAVs that T. pent- 

 aedra is rightly described by M'Coy, and that it is quite 

 different trom T. ambiyua. T. pentaedra has a rhyncho- 

 nelliform beak — it is evidently hypothyrid ; but T. amhigua 

 has a terebratulilbrm beak — it is epithyrid. Phillips's 

 descriptions fully bear this out. Of T. pentaedra he says 

 ''Perforation of the beak minute'"'; he applies the same 

 description to T. rhomboidea and to T. aeminula, but of 

 T. ambigua he says " beak with a large round aperture" — in 

 comparison with T. pentaedra it is " large." 



Therefore the type of Seminula is really a hypothyrid 

 rhynchonelloid, congeneric with T. seminula and T. idiom- 

 boidea, which at present are called Camarophoria, and it has 

 nothing to do with 1\ ambigua. 



Therefore it must be said : — 



Genus Seminula, M'Coy, 181:4. 



Genotype, species figured by M'Coy, fig. 31, j). 150,= T. jjentacdra, 



Phillips. 

 Non Seminula, Hall & Clarke, Schuchert et al. 

 Syu. Camarophoria (pars), Davidson et auctt. 



