WEST AFRICAN PROVINCE. 69 
*Adacna edentula, Pallas. C. - 
»  plicata, Eich. C. B. (Dniester, Akerman, Odessa). 
»  colorata, Eich. C. B. (Azof, Dnieper). 
* Mytilus edulis, L. C. C. (not in Middendorff’s list). 
» latus,Chemn. B. 
*Dreissena polymorpha, Pal. C. B. 
Paludinella stagnalis, L. (pusilla Eich.) C. B. (Odessa) Ochotsk. 
* 4,  variabilis, Eich. C. 
*Neritina liturata, Eich. C. on sea-weed. 
*Rissoa Caspia, Eich. C. 
oblonga, Desm. B. 
cylindracea, Kryn. B.* 
99 
x? 
The following species are described by EHichwald, from the 
steppe limestone. (Murchison, Russia, p. 297.) 
 Paludina” Triton. Donax priscus. 
a exigua. Mactra Caspia. Monodacna propinqua. 
Ri: soa conus. »  Karagana. Pr intermedia, 
»  dimidiatus., Cyclas Ustuertensis. of Catillus, 
Bullina Ustuertensis. Mytilus rostriformis. Adacna prostrata. 
No other inland bodies of salt water are known to have 
peculiar marine shells; those of the modern deposits, in Meso- 
potamia (at Sinkra and Warka), collected by Mr. W. K. Loftus, 
are species still abounding in the Persian Gulf. + 
VI. WEst AFRICAN PROVINCE. 
The tropical coast of Western Africa is rich in conchological 
treasures, and far from being wholly explored. The researches 
of Adanson,{ Cranch (the naturalist to the Congo expedition§), 
and the officers of the Niger expedition, have left much to be 
done. Dr. Dunker has described 149 species in his Jndew Moll. 
Guinece, coll. Tams. Cassel, 1853. 
At St. Helena, Mr. Cuming collected 16 species of sea-shells, 
7 of them new. Littorina Helene is found on the shore of St. 
Helena, and %. miliaris and Nerita Ascensionis, at Ascension. 
* The Velutina (Limneria) Caspiensis. A. Ad. was founded on a specimen of 
Limnea Gebleri, Midd. (1851), from Bernaoul, Siberia. 
+ A species of coral (Porites elongata, Lam.), now living at the Seychelles, has been 
said to be found in the Dead Sea (v. Humboldt’s Views of Nature, Bohn ed, p. 260); 
also Melania costata and MJ. Jordanica, according to M, Schubert. 
{ Hist. Nat. de Senegal, 4to. Paris, 1757. This able but eccentric naturalist 
destroyed the utility of his own writings by refusing to adopt the bi-nomial nomen- 
clature of LiInn2uS, and employing instead the most barbarous chance-combinations 
of letters he could invent. 
§ Appendix to Captain Tuckey’s Narrative (1818), by Dr. Leach. 
