434 mr. s. a- buckman on [Aug. 1906, 



Meanwhile, prior to Valenciennes, another author, James 

 Parkinson, had in 1811 figured two diphya-like shells [28] : he 

 named them both Terebratulites triquetra, but one is perforate, the 

 other is imperforate — the latter seems to be the same as Bruguiere's 

 T. pileus. 



The next author to be considered is Catullo [7]. He figured 

 various perforate forms and an imperforate fossil under the name 

 Terebratula antinomia ; but as he only mentions the perforate forms 

 in his description, one of them must be taken as the type. The 

 identification of Catullo's species is important ; because it was on 

 these figures of Catullo that Link, in 1830, founded the genus 

 Pygope [24]. Little doubt but that the perforate character was 

 considered the essential feature of the genus ; and therefore one 

 of Catullo's perforate shells must be taken as the type of Pygope. 

 Catullo subsequently wrote a paper [8] to show that his T. antinomia 

 was different from T. deltoidea, Yal. (Lamarck). This paper is not 

 noticed in Suess's synonymy [34], nor in Davidson's Bibliography 

 [16]. But what Catullo figures in this case as T. antinomia is a 

 different specimen from any of the perforate examples which he 

 figured before by that name ; he himself admits this. And as it does 

 not agree with his former figures in shape, one may conclude that 

 it is specifically distinct. Eor the present, it is necessary to distin- 

 guish it as T. antinomia 4- His imperforate form he now names 

 T. mutica. Later still, Catullo entered into more detail [9] : he 

 again figured T. antinomia and T. mutica ; he also copied from the 

 Encyclopedic Methodique the figure of T. deltoidea, Valenciennes 

 (Lamarck), and the figure of Anomia diphya from Colonna. 



A further paper by Catullo [10] is important, as, in it (p. 74), he 

 proposed the generic name Antinomia tor perforate Terebratulids. 

 He drops the term antinomia as a trivial name ; but he shows five 

 species in outline-drawings — Antinomia diphya and A. deltoidea, 

 which he assigns to the Neocomian ; A. angidata, A. angusta, and 

 A. dilatata, which he places in the ' Epiolitic Limestone/ say, 

 Upper Jurassic. He says nothing about how these species agree 

 with his previously-named forms ; but the outline of A. dipliya is 

 evidently taken from Colonna's figure, and that of A. deltoidea from 

 either the Encyclopedic Methodique, or from Catullo's previous 

 reproduction thereof : only, it is reduced to one-half linear. 



These facts may be summarized as follows : — 



The syntypes of Terebratida antinomia, Catullo, are the specimens 

 depicted in his figures p, q, r, s, t[7]. 



The specimen represented in fig. q was subsequently eliminated 

 by Catullo himself [8]. 



Three specimens thus remain — represented asp, r, and s-\-t. 



The genosyntypes of Pygope, Link, are the specimens represented 

 by Catullo's figures p, q„ r [7]. 



Of these, p and r are perforate, and q an imperforate species. 



The genosyntypes of Antimonia, Catullo, are the species to which 

 that author gave the names A. diphya (von Buch), A. deltoidea 

 (Yal.), A. angidata, A. dilatata, and A. angusta [10]. 



