MELYILL AND STANDEN : MARINE MOLLUSCA OF MADRAS. 33 



Sanguinolaria hendersoni n. sp. (PI. I., fig. 7). 



■5 1 . testa tenia, fere Icevi, subnitida, obscure concentrice incequaliier 

 striata ; valvis postice et antice paullulum hiulcis ; margin e postico 

 subtrapezoide, paullurn producto ; antico prolongate, rotundato, venirali 

 rectiusculo ; dorsali leniter utrinque declivi ; umbonibus Icevibus, toseis, 

 ccetera superficie pa Hide rosea. Long. 23, /at. 35 ;////;. 



A beautiful addition to a circumscribed genus. To no known 

 species does it nearly assimilate, save in colour, coming perhaps 

 nearest to the West Indian S. sanguinolenta Gm., which, however, 

 is far more produced and gaping posteriorly. The type, from Mr. 

 Henderson's collection, is of the dimensions given above, but three 

 other specimens, smaller but quite perfect (long. 20, lat. 32 mm.) 

 exist in J. C. Melvill's collection, which were obtained at a sale at 

 Stevens' auction rooms, in Dec, 1866, without label of locality. We 

 have much pleasure in naming this species after its discoverer. 



(II.) GENERAL CATALOGUE. 



We have carefully compared the following list with that 1 compiled 

 by Mr. Edgar Thurston, C.M.Z.S., Superintendent of the Madras 

 Government Museum, when investigating the Zoology of Ramesvaram 

 Island, and the Gulf of Manaar, Ceylon, and find 106 species in 

 common. Probably the very few of Mr. J. R. Henderson's Mollusca 

 collected at Pamban, were obtained about the same time as Mr. 

 Thurston's; the majority gathered 250 miles further north show on 

 the whole a great dissimilarity. 



Mr. Thurston's catalogue enumerates about 425 Marine Mollusca, 

 inclusive of a few brackish water or fluviatile forms, such as 

 Tympanotonos, Potamides, and Melanice, from Pamban and Tuticorin, 

 which we have not mentioned though they occurred in Mr. 

 Henderson's gatherings. Like ourselves, he has not attempted 

 differentiation of the Chitonidse. Our two species, both small and 

 insignificant, are probably new, for as Mr. E. R. Sykes informs us, no 

 Chitonidse are yet recorded from Madras. 



Amongst Mr. Thurston's more interesting records we note Conus 

 tongurionis Kien., which has lately occurred on the Malabar Coast 

 (Townsend), C. peplum Chemn., from Muttuwartu ; Mitra zebuensis 

 Rv., from the same place, this being one of the finest of the genus, 

 also M. acupida Rv., Cyprcea lentiginosa'L. (also found along the whole 

 W. Coast of Hindustan) Pterocera scorpio L., Ovulum formosum Ad. 

 Rv., and others. We should hope that many of these will ultimately 

 be found to reach the vicinity of Madras. 



That portion of Mr. Thurston's preface which gives a glimpse of 

 the appearance of the Madras coasts, is interesting, and well worth 



1 Bull. Mus. Madras, No. 3, 18 



