MOLLUSCA, I.- -SMITH. 10.'. 



iif the valves faintlv radiatelv sulcate. except towards tin- lower margin, where the 

 grooves are deeper, producing a pectinate cdm'; hinge iiiinnal. and posterior adductor- 

 si-ar liouiidfil liy a rounded ridge passing t'runi under tlie hinge-line. 



Length, 15 nun.: height, lO'iVi: diameter. 8 ' 5. 



Station 4l', dfl' Kio dr -lanciro. 40 fathoms: ,,nd Siatinn :'.S, west of Falkland 

 Islands, IL'.") fathoms. 



( 'luselv allied to C. curta, Jeffreys, but rather longer in proportion to the height. 

 and more distinctly rostate upon the anterior half of the valves. The anterior dorsal 

 outline is not so hunched up as in ciirtn. 



5. SOITII TRINIDAD ISLAND. 



1. Arrii (JBarbatia), sp. 



Station :!(>, South Trinidad Island : on the shore. 



Two specimens, in somewhat decomposed condition, appear to be very closely 

 related to the Mediterranean An-n /nir/mfn. Imt owing to the bad state of preservation 

 it would lie hazardous to pronounce a definite opinion. 



2. ^[iidinliii'iii lateralis (Say). 



My! il ii. Ittti'ritlix, Say, Jiiurn. Acail. Nat. Sci. Philad., vol. II, ]i. 2(14 (l^-'L'). 

 Modiola niarinonitii. Korbes (1838) ; Forbes and Hanley, Brit. Moll., vol. 11, p. 198, pi. XLV, 

 fig. 4. 



Station 36, South Trinidad Island: on the shore. 



Originally described by Say from Florida, this species occurs further north along 

 the coast of the United States. It is also known from Bermuda. On comparing 

 British with American specimens I fail to find any real distinguishing features. 

 .17. i-inn-iitii, Gould, and .I/. <-<rnl>it<i, Vaillant. may be regarded as forms of 

 this species. 



