Report on the zoological collections made in the Indo-Pacific Ocean ...

MOLLUSCA. 113'Conch.-Cab.' That collected by Dr. Coppinger has the auricle preciselylike that of Bunker's specimen, this form of it being, judgingfrom the series before me, more usual than that figured by Reeve.64. Avicula rufa.Dihnkcr, Conch.-Cab. p. 58, pi. 19. figs. 7, 8.Hah. Java {Danker); West Island, Priuce of Wales Channel,Torres Straits, 7 fms., sandy bottom {Coppinjer).All three specimens from the latter locality exhibit several whiteradiating lines on both valves, as indicated in the figure 8 referredto. The presence of these rays appears to have been rather exc(^ptionaliu the Javan specimens examined by Dunker.Reeve, Coiicli. Icon. fig. 45.05. Avicula smaragdina.Hah. Moluccas? {Reeve) ; N.E. Queensland {Ooppinger).The young stage of this species has not the very prolonged obliqueform of the adult. The figure in Reeve's wox'k is much too vividlycoloured, nor does it indicate any rays of spots of a darker tintwhich generally adorn both valves. The ear of the left valve iscoarsely concentrically wrinkled and extends a little within thevalve. This species may be the Mytllus meleagridis of Chemnitz(Conch.-Cab. viii. p. 143, fig. 726).QQ.Avicula zebra.Reeve, Conch. Icon. fig. 36; Dunker, Conch.-Cah. p. 60, pi. 21. fig. 3.Hah. Moreton Bay {Reeve) ; Port Denison, Queensland, 3-4 fms.(Coppinger).The two specimens obtained at the latter locality were attachedto a species of Polyzoa, and in a similar position to the types asfigured in the ' Conchologia Iconica,' namely with the umbonesdirected downwards.67. Melina cumingii.Perna cumingii, Reeve, Conch. Icon. xi. fig. 3.Hah. Australia {Reeve) ; Port Curtis (Coj^pinger).The specimen figured by Reeve is higher than long, but anotherin the Cumingian collection has these proportions reversed.68. Crenatula nigrina.Lamarck ; Reeve, Conch. Icon. fig. 1 a.Hah. Red Sea {Reeve) ; Albany Island, west coast of Australia{Coppinger).This species, also C. hicosfalis and C. mytiloides, as determinedby Reeve, are probably slight variations of one and the same form.I