390 Dr. H. Woodward — On Fossil Shells from Sumatra. 



I have to express my obligation to my colleague, Dr. A. Giinther, 

 F.K.S., Keeper of the Zoological Department, for permission to 

 compare and examine the recent species of Meiocardia in the Collec- 

 tion. 



Measurements of Meiocardia sub- Cumingii : — Length of valve of 

 smaller specimen 21 mm., width 22 mm. Length of valve of largest 

 specimen 30 mm., width 25 mm. Length of valve of Meiocardia 

 Cumingii 20 mm., width 20 mm. 



12. Cardita Sumatrensis, H. Woodw. PI. X. Fig. 5. 



This species presents some affinity to Cardita ScJiivabenauii, 

 Homes, and also to a form from the St.-Cassian Beds. 



Shell quadrate, anterior slightly rounded, posterior straight, ribs 

 15 to 17 in number, carinated and imbricated, the intermediate 

 spaces being much wider than the ribs. 



Width of valve 20 mm., length 16 mm. 



This is a most abundant shell occurring closely packed upon the 

 surface of yellow argillaceous slabs, feeling like "steatite" to the touch. 



Locality and Formation : — Tertiary, Sumatra. Probably from the 

 clay-band associated with Sandstones and Coals (5 b) described by 

 M. Verbeek (Geol. Mag. 1875, p. 479). 



13. Cardita, sp. (cast). PL X. Fig. 6. 



This specimen appears to have been somewhat more coarsely 

 ribbed than the preceding, and the umbones of the valves rather 

 more produced ; but the specimen is too much abraded to determine 

 satisfactorily. 



Width of valve 21 mm., length 19 mm. Cast in limestone (No. 5), 

 Verbeek, Geol. Mag. 1877, p. 444. Eocene? Tertiary, Sumatra. 



14. Cytherea, sp. (cast). PI. X. Fig. 15. 



Only a single valve preserved as a cast, which is referable to the 

 genus Cytherea. 



Locality and Formation : — From the Miocene Clay-marls, Island of 

 Nias, Government of the West Coast of Sumatra. 



15. Callista, sp. (cast). PI. X. Fig. 14. 



A cast of a compressed sub-quadrate shell, with the umbones pro- 

 minent and very anterior, lunule deep (no muscular impressions 

 visible, hinge-line long) ; below which the shell is slightly grooved. 



Locality and Formation: — From the Miocene Clay-marls, Island 

 of Nias, Government of the West Coast of Sumatra. 



16. Dosinia cretacea, Reeve (cast). PL X. Fig. 8. 



Reeve (1850), Conch. Icon., sp. 35 (Artemis), pi. vi. fig. 35. 

 Sowerby, Thesaurus Conch., 1855, vol. ii. p. 667, No. 46, t. 142, 

 fig. 51. 

 My colleague, Mr. Edgar A. Smith, who has most obligingly com- 

 pared this and other fossil specimens with the recent shells in the 

 Zoological Gallery for me, remarks : — " These casts agree remarkably 

 well with the recent Dosinia cretacea, Reeve. The form, the depth 

 and size of the lunule, and the shape of the muscular impressions as 

 far as traceable, are identical." 



