500 Dr. G. E, Dobson o?i a new Siiecies o/Vesperugo. 



8. Velutina Icevigata, Pennant. Hah. Hope Island. 



9. Natica, sp. ? Hah. Lomme Bay {fide A. E. E.). 



10. Trochus umhilicalis, Broderip and Sowerby. Hab. Hinlopen 

 Straits. 



11. T.Jielicimis, Fabricius. Hab. Fail- Haven, "Wide Bay, Hinlopen 



Straits, and near Walden Island. Common. 



12. Puncturella noacliina, L. Hah. Iv^ear Foster's Island, Hinlopen 



Straits. 



13. Chiton mannoreus, Fab. Hah. Wide Bay and Hinlopen Straits. 



14. C. albus, L. Hab. Hinlopen Straits. 



Class CONCHIFERA. 



15. Sa.vimva rugosa, L. Hab. From Green Harbour to Hinlopen 



Straits. Common. 



16. Mya truncata, L. Hab. The fiords and bays of the western 



coast. 



17. Astarte crenata. Gray. Hah. Hinlopen Straits. 



18. A. 2)i(lc7iella, Jonas? (I have not Jonas or Eeeves's ' Belcher' to 



refer to. — J. G. J.) Hah. Hinlopen Straits. 



19. A. sulcata, Da Costa. Hah. Hinlopen Straits. 



20. Cardium groenlandicum, Ch. Hah. Lomme Bay. 



21. Leda pemida, Miill. Hab. Trenrenberg Bay. 



22. Ilodiolaria nigra, Gray. Hab. Treurenberg Bay. 



23. 31. discors, Linn. Hab. Fair Haven. 



24. Pecten isJandicus, Ch. Hah. AVide Bay, Treurenberg Bay, and 



Hinlopen Straits. 



Class Brachtopoda. 



25. Rhynchonella psittacea, Chemnitz. Hab. Lomme Bay and near 



Carl Island. 



LI. — DescrijJtion of a new Species o/ Vesperugo from Zanzibar. 

 Bj G. E. Dobson, M.A., M.B., F.L.S., &c. 



Vesperugo ( Vesperus) grandidieri^ n. sp. 



Head, ears, and tragus very similar to those of Vesperugo 

 ahramus^ Temm. Ears short, rounded off above ; outer mar- 

 gin of the ear-conch straight or faintly concave in upper two 

 thirds, emarginate opposite the base of the ti'agus, terminating 

 in a small rounded lobe midway between the base of the tragus 

 and the angle of the mouth : crown of the head scarcely ele- 

 vated above the face-line ; nasal apertures separated widely, 

 opening forwards, their margins not projecting. 



Wing-membrane from the base of the toes ; postcalcaneal 

 lobe very shallow ; half the last caudal vertebra free. 



