36 Brief notes on the Geology Sfc. of Nancowry harbour. [No. 1, 



important forms, to any one who takes any interest in this branch 

 of the marine fauna of the Indian seas ; amongst them is a 

 species of Corbis, and several new and interesting forms of different 

 genera, belonging to the Mitridce, Pleurotomidce, Kassiiice, &c. 

 identical or very similar to Philippine species, and which I have 

 never found, or heard of, from places further west, not even from 

 the coast of India. From the data which I, up to the present, 

 possess, the Marine Molluscous Fauna of the Andamans seems to 

 me nearest allied to that of Arracan — of late most ably worked out 

 by Mr. W. Theobald witli the assistance of Mr. S. H a n 1 e y, that 

 of the Nicobars approximating more closely to that of Singapore. 

 There is one great difficulty everybody out here has to contend 

 with, who is desirous of working on the range of species in the 

 Indian seas, that is, the absence, in all of the Calcutta Libraries, of 

 Krauss' " Siid-Afrikanische Mollusken," a standard work of pri- 

 mary importance for this subject. From the small collection I was able 

 to make at Natal, and from that of Mr. B 1 a n f o r d ' s from Annesley 

 Bay, I should say the species ranging as far as these places are but 

 veryfew in number : Cypraa annulate, hehola, sm&pellu serpcntis, Pur- 

 pura tubcrculata, Xerita albicilla and polita, Katiea mam ilia and 

 one or two others, the number of species common to both incri 

 considerably at the Seychelles and Bourbon, and still more at Cey- 

 lon. Of the 128 species collected by Mr. Ball, 70 are well known 

 forms and widely spread in our seas ; amongst the rarer or 

 more local species, I may mention Conns zonatus, marcliionatus 

 and, mustelinus, Jlitra phcata, Grilneri, semifasciata, cruentata, 

 exasperata, Jlammigera (?), and 3 probably new species. Phos 

 Blainvillei, Pleurotoma abbreviata and tigrina, Cerithium Traillii and 

 alveolus, Strombus columba, Columbella ?, Papa papyracea, Trochus 

 fenestratus, Euehelus foveolatus, Pohjdonta incamata, Purpura mu- 

 sica and bitubercularis, Murex nigri-spinosus and adunco-spinosus, 

 Natica - albula and n. s. (?), Actceon coccinata, Tectura Borneen- 



When at the Andamans I have with pleasure observed the collecting zeal of 

 many of the officers of the settlement, and I have little doubt that their exer- 

 tions will soon enable us to obtain a very fair knowledge of the Molluscous 

 fauna of these islands. Dr. Day on his late visit in connexion with the 

 fisheries has also collected largely mollusca, both land and marine shells. 

 [S toliczka]. 



