1901.] MOLLUSKS FROM THE PERSIAN GULr. 331 



and Tricliotropis are especially noteworthy, as, among the Strom- 

 bidag, are S. beluchiensis Melv., Rostellaria curia Sowb., and JR. deli- 

 catula jNevill ; this last, originally discovered at Arakan, is now 

 found to occur at considerable depths in the Gulf of Oman, in all 

 stages of growth. 



Many ColumbeJlidce, Engince, and Ricinulce seem peculiar ; while 

 the Pleurotomidce are by far the most numerously distributed 

 family in these Seas, abounding in forms either endemic or 

 extending only as far as Aden and the Eed Sea. 



Fusus, Lotorium, and Murex do not exhibit here their larger repre- 

 sentatives, but those that do occur are refined and select examples 

 of their genera ; some, e. g. Ocinebra homhayana Melv., being akin to 

 a Mediterranean species : the same may be said with Purpura. In 

 Terehra there are many, mostly endemic, small species, mainly 

 described by Mr. Edgar Smith from Col. Felly's collections. 

 Coralliojpliila rubro-coccinea, described in this paper, is an interesting 

 addition to a circumscribed genus. Bullia here rivals its South 

 African series in interest : B. cerojplasta Melv., kurracJiensis Sowb., 

 and persica E. Sm., are all endemic. Natica abounds ; so do 

 Cerithiidce, Littorinidce, and allied small families, the Bissoidoi 

 being especially interesting. In Turritella, T. fidtoni Melv,, 

 discovered at Ormara, is now found larger and more generally 

 distributed on the Mekran Coast ; many endemic Trochidce 

 likewise occur, but few Baliotis, Fissurellce, or Patellce. Two 

 Siplionai'ia (kurracJiensis Sowb., and basseinensis Melv.) from the 

 coasts of India are peculiar. Among the Scaphopoda, Gadulus 

 possesses two or three curious forms, and Dentcdium abounds. 

 The Polyplacop>hora a,ve hardly seen, indeed we have no occurrences 

 in our Catalogue ; but, on the other hand, the Tectibranchiates are 

 very well represented, many new kinds being chronicled, and 

 there being still some which, for want of proper material, we are 

 compelled to leave untouched for the present. Indeed, this is the 

 case in other Orders as well. 



We wait to give a resume of the Pelecypoda until they are 

 finally worked out, and we hope their enumeration will form a 

 second part o£ our paper, at no very distant date. 



The following are the titles of the chief works and papers 

 bearing on this subject during the last 45 years : — 



1894. Abeeceombie (Alexander). — The Common Shells of the 

 Bombay shore. Journ. Bombay Soc. N. H. viii, pp. 212- 

 221 & 335-345, 



1867. Blaneoed (W, T.). — Description of Irawadia, n. gen. 



Journ. Asiat. Soc. Bengal, vol. xxxvi. pt. 2, pp. 56-57. 



1868. Id. — Fairbanhia, a new genus and species of Rissoidae from 



W. India. Ann, Nat. Hist. ser. 4, vol. ii, pp. 399-401. 

 [N.B, Nine-tenths of Mr. Blanford's writings on the Molluscan 

 Fauna of India deal with the Terrestrial and Eluviatile 

 species alone, and the same may be said regarding the 

 papers of his brother, the late Mr. H. F. Blanford, F.E.S.] 



