800 MESSRS. MELVILL AND STANDEN ON [Nov. 13, 



Mr. Jukes-Browne makes Septifer Recluz a subgenus of Brachyo- 

 dontes Sw., raised by him to generic rank *. 



MoDiOLA ALBicosTA Lam.f [Volsella Scopoli, 1777.) 



P.G. Linjali. 3 fathoms, where a large bed of this species was 

 unearthed, mostly hardly adult, and in very perfect condition. 



MODIOLA AURICTJLATA KlUUSS. 



P.G. Exact locality not specified, but seemingly identical with 

 typical S. African examples. 



MoDiOLA ELEGANS Gray. 



P.G. Shaikh Shuaib Island, off Maskat. 15 fathoms. 

 M.O. Oharbai-. 7 fathoms, sandy mud and rock. 



MODIOLA FLAVIDA Dkr. 



P.G. Gulf of Oman, Maskat. 10-15 fathoms, muddy sand 

 and spongy growths. 



MoDiOLA MODIOLUS (L.). {Mytilus L. in parte.) 

 P.G. Jask. Dredged on Mason Shoal at 3 fathoms, coral- 

 sand and stone bottom. 



Of wide distribution, temjjerate and tropical. We have col- 

 lected it on the shores of the United States of America. 



MoDiOLA RHOMBOiDEA Hanley. (Volsella Scop.) 



P.G. Gulf of Oman, Maskat. 10 fathoms, inside sponges. 

 M.C. Charbar. With M. eleyans Gray, at 7 fathoms. 



Brachyodontes emarginatus (Benson). 



Modiola emarginata Benson. 



I. Bombay [Ahercromhie), but rarely. 



Brach-v oDONTES (Hoemomya) karachiensis, sp. n. (Plate LIV. 

 fig. 8.) 



B. testa luteo-fasca, e2yklerm,ide sordide cdha ^jariwji indutay 

 arcuato-ohlonga, parva, gihhoso-glohosa, postice concava, antice 

 apvd umbones rotunde attemiata, s%iperfic%e scejje laminis 

 increvientalibus concentrice prcedita, undique arete radiatim 

 ramoso-lirata ; interstitiis arctissime concentrice liratulis ; 

 pagina interna pallide margaritacea, ligamento onargmali, 

 cardinali cremdato. 



Alt. 7, lat. 13, diam. 7 mm. 



Hah. India : Karachi ; on loose stones at low water. 



This species has remained long at the Bi-itish Museum unnamed. 



* Proc. Mai. Soc. vol. vi. p. 222. 



t Three species of 3fodioIa —pfiilippinarum Hanley, watsoni Smitli, and 

 arhorescens (Chemn.) — also a new Crenella, C. persica Smith, were latel}' dredged 

 in the Persian Gulf by s.s. ' Investin;ator.' 



