198 MESSRS. J. 0. MELVILL AND R. STANDBN OK 



surface, and longitudiDallj seven-rayed; its dorsal margin is 

 prolouged, and almost straight till its sudden angle on merging 

 into the ventral margin, anteriorly, while the hinder margin is 

 abbreviated, the surface being longitudinally wrinkled ; the 

 ligament is external ; within, the surface is pale pink ; the hinge 

 has in one valve a bifid, in the other an undivided single tooth ; 

 the pallial line is sinuate. 



398. PSAMMOBIA (GrABi) ANOMALA, Desh. 



Our specimens do not show the usual radiations of this 

 delicate shell. 



Station 5, Boydong Cays. 



399. PsAMMOBIA (GrAEl) MAEMOREA, Besh. 



station 13, Mer. 



400. PsAMMOBIA (GrARl) ORNATA, BesJl. 



A yellow, prettily rayed variety. 

 Station 13, Mer. 



401. PsAMMOBIA (GrARl) PR^STANS, BesJl. 



402. PsAMMOBIA (GrARl) PULCHERRIMA, JDesh. 



403. SOLETELLINA VIRESCENS, JDesJl. 



A curious shining pale ochraceous variety, with two longitudinal 

 broad orange flames, one on each side of the umbones, very 

 evanescent towards the ventral margin. It is a rare form, and 

 seldom met with. 



Station 13, Murray Island. 



404. ASAPHIS DEFLOEATA, Ii. 



It is possible that all the Asaphis of the Western hemisphere, 

 e. g. A. dichotoma, Anton, A. coccinea, Mart., &c., are but varieties 

 of one variable form, equally abundant in the East. 



Station 2, Warrior Island ; Station 5, Boydong Cays. 



SoLENIBiE. 



405. Soi/ENOCURTUS (Azar) coarctatcjs, Gmel. 

 Station 13, Murray Island. 



Mesodesmatid^. 



406. Mesodesma pr^cisa, Besh. 

 Station 8, Albany Pass. 



