MOLLUSCA. 113 



' Conch.-Cab.' That collected by Dr. Coppinger has the auriclo pre- 

 cisely like that of Dunker's specimen, this form of it being, judging 

 from the series before me, more usual than that figured by Peeve. 



64. Avicula rufa. 

 Dunker, Conch.-Cab. p. 58, pi. l'J. figs. 7, 8. 



Hab. Java (Danker) ; West Island, Prince of Wales Channel, 

 Torres Straits, 7 tins., sandy bottom (Goppinger). 



All throe specimens from the latter locality exhibit several white 

 radiating lines on both valves, as indicated in the figure 8 referred 

 to. The presence of these rays appears to have been rather excep- 

 tional in the Javan specimens examined by Dunker. 



(j5. Avicula sniaragdina. 

 Reeve, Conch. Icon. fig. 4o. 



Hab. ^Moluccas'? (Reeve) ; N.E. Queensland (Coppinger). 



The young stage of this species has not the very prolonged oblique 

 form of the adult. The figure in Ileeve's work is much too vividly 

 coloured, nor does it indicate any rays of spots of a darker tint 

 which generally adorn both valves. The ear of the left valve is 

 coarsely concentrically wrinkled and extends a little within the 

 valve. This species may be the Mytilus meleagridis of Chemuitz 

 (Conch.-Cab. viii. p. 143, fig. 72Q). ' 



66. Avicula zebra. 

 Reeve, Conch. Icon. fig. 36; Dunker, Conch.-Cab. p. 60, pi. 21. fig. 3. 



Hab. ^Joreton Bay (Reeve) ; Port Denison, Queensland, 3-4 fms. 

 (Coppinger). 



The two specimens obtained at the latter locality were attached 

 to a species of Polyzoa, and in a similar position to the types as 

 figured in the ' Conchologia Iconiea,' namely with the umbones 

 directed downwards. 



67. Melina cumingii. 

 Perna cumingii, Reeve, Conch. Icon. xi. tig. 3. 



Hab. Australia (Reeve) ; Port Curtis (Coppinger). 

 The specimen figured by Peeve is higher than long, but another 

 in the Cumingian collection has these proportions reversed. 



68. Crenatula nigrina. 

 Lamarck; Reeve, Conch. Icon. fig. la. 



Hab. Eed Sea (Reeve) ; Albany Island, west coast of Australia 

 (Coppinger). 



This species, also C. bicostalis and C. mytiloides, as determined 

 by Reeve, are probably slight variations of one and the same form. 



i 



