806 MESSRS. MELVILL AND STANDEX OX [Nov. 13, 



5 to 20 fathoms, but have never found a single specimen of the 

 true Mother-of-Pearl shell, and veiy few, not more than a couple 

 of dozen altogether, of the small Pearl-Oyster, which I take to be 

 the same species as that of which rich beds are mentioned as 

 existing to the northwai-d of the Bahrein Islands. In N^ovember 

 1903 I dredged many of the small pearl-oysters off the coast from 

 Ras-el-Khaima and Abu Thabi, but did not get a single specimen 

 of the large mussel, though I saw many sacks of it at Dabai 

 ready for expoi't. It occurs very rarely on the old telegrapli- 

 cable, while the small A. marmorata is an abundant form. 



" The ' rope-pullers ' mentioned (in Mr. Gaskin's report) are, 

 I believe, the men who pull the baskets of oysters up from the 

 bottom when they have been filled. 



" When they so place them, at the same time the divers also 

 include a great many other shells, notably Pecten crassicostatus, 

 toivnsendi, Spondylus exilis — this in all stages of growth an<l 

 coloration, from light orange to deep purple — Ci/prcea', e.g.,lenii- 

 ginosa, Jlmhriata, and turdits, also a species of Trochus, probably 

 T.fuUoni. All these, and others, I have myself found frequently 

 in large numbei-s among the refuse thrown out of the pearl-boats, 

 after they have been hauled up on the beach at the end of the 

 working season." — F. W. T. 



Perna rostrata Schum. { = isognomon Klein). 

 P.G. General. Found on coral-reefs at low tide. 



Pinna bicolor Chemn. 

 P.G. On telegraph-cable. 



Pinna (Atrina) nigra Chemn. 



P.G. & M.O. Local, and occasionally dwarfed, when the shell- 

 substance becomes considei'ably thickened. 



I. One specimen alone recorded from Bombay {Ahercromhif). 



Pinna (Atrina) vexillum Born. 



I. Karachi. Dredged at 3 fathoms, mud. 



Malleus normalis Lamarck. 

 P.G. Maskat, 15 fathoms. 



Fam. OSTREID.E. 

 OSTREA BICOLOR Hani. 

 I. Bombay (Abero'ombie). 



OSTREA CRENULIFERA Sowb. 



I. Bombay [Ahercrombie). 



OsTREA CUCULLATA Bom. 



P.G. On telegraph-cable in two or three situations. 



