1901.] MOLLUSKS FROM THE PERSIAN GULF. 331 



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

 bidae, are S. belucJiiensis Melv., Rostellaria curia Sowb., and li. deli- 

 catula jN'evill ; 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 ColumbelMdce, 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 Red Sea. 



Fits us, Lotoriwn, 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 bombayana Melv., being akin to 

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

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

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

 Coralliophila rubro-cocdnea, described in this paper, is an interesting 

 addition to a circumscribed genus. Bullitt, here rivals its South 

 African series in interest : B. ceroplasta Melv., Jcurrachensis Sowb., 

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

 Cerithiidce, Littorinidce, and allied small families, the Rissoidce 

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

 discovered at Orrnara, is now found larger and more generally 

 distributed on the Mekran Coast ; man) 7 endemic Trochidce 

 likewise occur, but few Hcdiotis, Fissurellce, or Patella*. Two 

 Siphonaria (Jcurrachensis Sowb., and basseinensis Melv.) from the 

 coasts of India are peculiar. Among the Scaphopoda, Gadulus 

 possesses two or three curious forms, and Dentalium abounds. 

 The Polyplacophora are hardly seen, indeed we have no occurrences 

 in our Catalogue ; but, on the other hand, the Tectibranehiates 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 

 linally worked out, aud we hope their enumeration will form a 

 second part of 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 : — 



1^04. AbBBOBOMBIE (Alexander). — The Common Shells of the 



Bombay shore. Joum. Bombay Soc. N. II. viii. pp. 212- 



221 & 335-346. 

 L867. Blaotobd (W. T.). — Description of Trawadia, n. gen. 



Joum. Asiat. Soc. Bengal, vol. xxxvi. pt. 2, pp. 50-57. 

 lbOS. Id. — Fairbankia, a new genus and species of Rissoidse from 



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

 [N.B. Nine-tenths of Mr. Blanford's writings <>n the JMollusean 



Fauna of India deal with the Terrestrial and Fluviatile 



species alone, and I he same may be said regarding the 

 papers of Ins brother, the hit t Mr. II. F. Blanl'ord, F.li.S.j 



