49 



According to F"kech, the largest specimen of this species in the British 

 Museum attains almost i m. in length ; I have also seen many polished slabs 

 of limestone with this fossil, of which four measurements of the shells are 



criven hplow • - 



Diameter of Diameter of 



the larger end. the smaller end. 



70 mm. 



55 17 mm. 



40 ,, 6 mm. 



35 ,, 25 mm. 



No. I and 4 are from Yang-ko-la, and No. 2 and 3 from unknown localities. 



The specimens now at hand are much smaller in size, but isolated from 

 the matrix, as shown on Plate XXVII. The septa are further apart than 

 half the diameter of the tube, and are provided with a long septal neck. 



Locality : — The figured specimens are from prov. Hu-pei (Noda Coll. No. 

 I02). Found in association with Cyrtoccras {Alcloccras) cllipticnin Lassen, 

 and Asap/ms sp. Abendanon obtained it, together with Discoccras vcrbccki 

 Frech, at a place between the second and third gorges of the Yan-tse-kiang 

 above I-chang. The two specimens measured above, No. i and No. 4 are 

 from a locality on the road between Yang-ko-la, Chi-chiang-Hsien, prov. 

 Sze-chuan and Chu-tien-ya, prov. Kwei-chou (Yamada Coll.) 



OrthocerES (?) sp. indet. 



PI. XVIII., Fig. 3 ; PI. XXVII., Figs. 2a-e. 



This represents a very remarkable type of orthoceracone Nautilids, and it 

 is only provisional that I refer the specimen to the genus Orlhoccras. The 

 specimen is a fragment of a cylindrical shell, in state of internal cast, and 50 

 mm. long ; it is oblong in cross section, measuring 29 mm and 24 mm in larger 

 and smaller diameter respectively. The surface of the stone nucleus is 

 smooth, except for 6 sharply impressed annular lines which are 5—7 mm. 

 apart ; the impressions are somewhat wavy, probably owing to the secondary 

 deformation of the entire shell. The lines at first sight appear to be the suture 



Lengtli 



1. 1000 mm. 



2. 370 „ 

 3- 330 „ 

 4. 220 „ 



