(ii) 66 Palseontologia Sinica Ser. B. 



Bickmorites, taking Lituites hickmoreanus Whitfield as its genotype. According to the 

 description' given by Foerste Bickmorites is a gyroceracone in the early stages with 

 strongly marked transverse rib-Uke annul ations and some other important surface 

 ornamentations, and its siphuncle lies slightly ventral of the center. Although our 

 specimen closely resembles Bickmorites in some aspects, its siphuncle is located near the 

 dorsal side and its inner side shows a fairly straight profile in the longitudinal section, 

 indicating that there are no annulations at all. It is not desirable to make a new 

 genus for our shell until we obtain other specimens of the same form which show the 

 external characters. 



From the specific point of view, the present form may be related to Lituites latus 

 Angelina , but the more slender, more slowly tapering, and less bent, straight portion 

 sufficiently distinguishes our shell from Angelin's species. 



Horizon and Locaijty: This specimen came from the bed just below the 

 reddish Hmestone at He-chiao, Chung-yang-hsien. The specific name is given in honor 

 of Mr. C. Li, geologist to the Institute of Geology, National Research Institute of China 

 (C. Li and W. P. Shu Coll.) 



Suborder Cyrtochoanites Hyatt 



Family ONCOCERATIDAE Hyatt 



Genus ONCOCERAS Hall 



Subgenus MELOCERAS Hyatt 



Meloceras asiaticum Yabe 



Plate IX., Figs. 8, ga-c. 



1911. Cyrtoceras (Meloceras) cf. ellipticnm, Freeh: Richthofen's China, Vol. V, p. 6, pi. II, figs. 

 3a-c. 



1920. Cyrtoceras [Meloceras] asiaticum, Yabe: Palseontology of Southern China, p. 52, pi. XVIII, fig. 

 14; pi. XXVII, figs. ya-b. 



This species is represented by several fragments, which enlarge in diameter very 

 gently. In one of the smaller specimens (PI. IX., Fig. 9) it is uniformly arcuate and 

 about 40 mm. long along its convex side. The cross section is ovately elliptical. The in- 

 ternal side seems to be thicker than the external. The siphuncle is situated nearly 

 marginal to the external side. It is circular in section and very small in size, measuring 

 I mm in diameter, where the corresponding measurements of the shell are 15 mm. in the 

 dorso-ventral diameter and 12.5 mm. in the transverse. 



1. Foerste: loc. cit. p. 47. 



2. Angelin-Lindstrom: Fragtnenta Silurica, p. 9, Tab. XI, figs. 1-4. 



