572 MR R. BULLEN NEWTON ON SOME CRETACEOUS BRACHIOPODA 



\\ est of France. Coquand has referred to its having been found in Algeria, and 

 Peron * mentions casts from Tunisia which he determined as Trigonia cf. crenulata. 

 The age of the species is usually regarded as Cenomanian. 



Occurrence. — In a hard creamy-coloured limestone. 



Localities. — No. 292 — Canyon E. of Old Lobito ; Catumbella . . ., British 

 Museum, L. 18,582. 



Fam. Crassatellitid^. 



Anthony a cf. baudeti, Coquand. (PI. I, figs. 15 and 16.) 



Crassatella baudeti, Coquand : Geol. Pal. Constantine, 1862, pi. xiii, figs. 5-7, p. 198. 



Grassatella (Anthony a) baudeti, Pervinquiere : ittudes Pal. Tunisienne : Gast. Lamell. Cretaces, 1912, p. 250. 



Remarks. — It is interesting to be able to determine one of the specimens of 

 this collection as being closely related to Coquand's Crassatella baudeti from the 

 Cenomanian deposits of Algeria, a species which is also known from rocks of 

 similar age in Tunisia and Italy. Its dentition, however, has never been ascertained, 

 so that the identification hitherto has had to be based on external and cast features 

 only. Quite recently Pervinquiere, in referring to its occurrence in Tunisia, has 

 placed the species in Anthonya, a genus founded by Gabb for a Crassatelliform shell 

 from the Upper Cretaceous of California,t with which its sculpture and contour show 

 considerable resemblance. But the interest of Anthonya is its dentition, which 

 consists of two strong divergent cardinals in each valve ; moreover, the hinge region 

 is without the ligamental fossette so characteristic of Crassatellites ( = Crassatella), 

 details which are of sufficient importance for the recognition of Anthonya as a 

 genus and not merely a section as implied by Pervinquiere, although it must be 

 granted he was without knowledge of the dental features of the shell. 



Dr Gregory's Angola specimen is curiously fractured in the umbonal region, so 

 that the dentition of the left valve is well displayed, and is seen to agree in its 

 main features with that of Anthonya. There is, however, this distinction, that the 

 teeth are laterally and transversely striated, \ no mention being made of such a 

 structure by Gabb, although it may possibly be present in specimens of thoroughly 

 good preservation. A difference exists also in the sculpture, the Angola fossil 

 showing minute vertical striations between the concentric costse which ornament 

 the valves, a feature not yet recorded in the history of Coquand's species nor in 

 the type form of Gabb's genus. Although found in another region of Africa, this 

 interesting specimen may be considered as furnishing a clue to the dentition of 

 C. baudeti, and therefore connecting it with Gabb's genus Anthonya, as first suggested 

 by Pervinquiere, on external characters only. 



*■ Moll. Foss. Cretaces Tunisie : Explor. Scien. Tunisie, 1891, pt. 2, p. 263. 



t Geol. Surv. California : Palaeontology, 1864, vol. i, pi. xxx, figs. 236, 236a, p. 182. 



X A similar structure has been observed by Gaisb in bis Cretaceous genus Remondia from Mexico (Geol. Surv. 

 California: Palaeontology, 1869, vol. ii, pi. xxxvi, figs. 17, 17a, p. 270), which, however, is distinct from Anthonya in 

 possessing more teeth, and is besides of a totally different contour. 



