by L. F. Spath. 49 



but is poorly preserved, possibly represents the Puzosid early stage of 

 a Parapachydiscus, or at least of one of the groups at present included 

 in that polyphyletic genus, e.g. the North American forms of the 

 group of i P > newberryanus (Meek) Whiteaves, non Gabb, or the 

 South Patagonian l P achy discus,' described by Paulcke. 



There are two examples of a new form of such a 'Parapachydiscus ' 

 (P. umtamfunensis, Crick MS. sp.) in the British Museum, distin- 

 guished from P. hauthali, Paulcke sp. 1 only by a more lytoceratid 

 mode of coiling, and agreeing in suture line with P. amarus, Paulcke. 2 

 The smooth inner whorls of these ''Parapachydiscus ■,' however, are 

 quite different from the present examples, and in the newberryanus- 

 group, the inner whorls are too strongly ornamented. 



In side-view the ornament of the present examples resembles that 

 of k Holcodiscus ' poudicherryanus, Kossmat, 3 which is neither a Para- 

 pachydiscus nor a Kossmaticeras, but belongs to a Puzosid stock that 

 also includes 'Puzosia ' japo?iica, n.n. == Desmoceras gaudajna, Yoko- 

 yama, non Forbes, 4 and P. darwini (Philippi in Steinmann) and 

 which is intermediate between Parapuzosia and Kossmaticeras. 



The present species has a more rounded whorl-section, suggestive 

 of the constricted Parapachydiscus, above referred to. It is distin- 

 guished from young Kossmaticeras and from 'Holcodiscus ' pondicherry- 

 anus by the ornament appearing first on the venter, and not on the 

 lateral area, and from Parapuzosia by its straight constrictions. 



Genus HOPLOSCAPHITES, Nowak. em. 



13. HOPLOSCAPHITES, Sp. JUV. 



An immature, completely septate example of a 'Scaphites ' of a 

 diameter of only 14 mm., has a more compressed whorl-section than 

 the form figured by Woods 5 and the ribs are strongly flexiradiate ■ 

 but the suture-line, with bifid lobes and saddles, shews similarly 

 rounded, terminal folioles, suggestive of simplification. The first 



c\b<\ 



1 loc. cit. 1905, p. 233, pi. xix, fig. 2. 



2 uVfcext-fig. 29 on p. 62. 



3 loc. cit. '""196?*, p. 40, pi. vi, fig, 6. 



4 " Verstein, a.d. Japan. Kreide.", Palaeontograpbica, vol. 36, 1890, p. 184, 

 pi. xix, fig. 5. 



5 loc. cit. (1906), p. 343, pi. xliv, fig. 8. 



