28 Melvill, Molluscan Fauna of the Arabian Sea^ etc. 

 Plicatula PERNULA, sp. nov. 



(PI. 2, f. lO.) 



p. testa paulluni incequivalvi^ incequilaterali^ pediformi^ 

 parva, depresso-planata^ pallide carneo-rufa^ costis obliquis 

 circiter decern decorata, his costis hie illic spiniferis^ spinis 

 brevities y tubiferis^ sqiiamatis^ transversint superficie oinni 

 valvarum rudi-corrugatis ^ wnbonibus angustiSy latere antico 

 arcuato, ventrali, cum postico, leniter rotundato-oblongo^ intusy 

 in speciminibus maturis circiter marginem incrassato^ longi- 

 tudinaliter costarum impressiones exhibente^ cardine utroque 

 dentibus dnobiis deviis. 



Alt. 20, lat 15, diam. 4 mm., sp. maj. 



Hab. Malcolm Inlet, Persian Gulf ; 24 fathoms, mud. 



Apparently near P. depressa Lam., from the New 

 World, and P. muricata A. Ad. Mr. Hugh Fulton, who 

 has made comparisons with this latter, writes me that that 

 shell is not so narrow at the umbones, and that the 

 plications are far more numerous, nor are the spiny 

 scales tubulous as in P. pernula. 



Though small, it appears full grown : the shells are 

 covered with SerpulcB and Lepralice ; eight examples in all. 



{pernula, a little ham, from the form.) 



Lima (Limatula) leptocarya, sp. nov. 

 (PI. 2, f 2.) 



L. testa tenui albida, recta^ cequivalvi, oblonga, clausa^ 

 ventricosa, longitudinaliter arete costulata^ costis ad medium 

 vaharum prominulisy ad latera evanescentibus, nuniero ad 

 sex et viginti, umbonibus distantibus, sulculo mediano vix 

 notato, auriculis cequalibus, 7nargine cardinali lato. 



Alt. 8, long. 5, diam. 4*50 mm. 



Hab. Muscat ; 10 fathoms. 



Resembling the British L. subauricidata Mont, and 

 especially L. elliptica Jefifr. In the former species the 

 longitudinal median sulcus is distinct and central, in the 



