THE MOLLUSCA OF TOKRES STRAITS. 195 



Station 2, Warrior Island ; Station 13, Murray Island ; 

 Station 5, Boydong Cays ; Station 4, Ormans Eeef ; Station 10, 

 Hammond Island. 



375. Chiojste (Omphaloclatheum) Chemnitzii, Hanley, 

 Station 8, Albany Pass. 



376. Chione ( Omphaloclatheum) costellieera, Ad. 

 Station 13, Murray Island. 



377. Chione (Omphaloclatheum) embeithes*, sp.n. (PI. 11. 

 figs. 23, 23 a.) 



C. testa percrassa, multum convexa, ovato-rotunda, gequivalvi, 

 insequilaterali, umbonibus inversis, approximatis, superficie con- 

 centrice costulata, costis tornatis, interstitiis arctissime sculptis, 

 deinde calcareo-tessellatis, longitudinaliter quadriradiata, in- 

 terdum sparsim brunneo-maculata, interdum unicolore, lunula 

 perexcavata, latere antico multum compresso, deinde marginem 

 apud ventralem rotundato, postico abbreviate ; pagina intus alba, 

 nitida, eirciter impressionem muscularem posticam pulchre 

 rubescente, linea palliali conspicua, sinuosa ; cardine incrassato, 

 dentibus cardinalibus simul ac laterali postico conspicuis, antico 

 perminimo, marginibus intus serrulatis. Alt. 28, lat. 30, diam. 

 22 mm, (spec. maj.). 



Station 8, Albany Pass ; Station 4, Ormans E-eef. 



Hitherto mixed up and confounded with C. toreuma, Grould, 

 also inhabiting the same seas, this species can be with ease 

 differentiated by the extremely excavate lunule and less frequent 

 concentric laminae. Besides these distinctions, the interstitial 

 spaces between the laminae are more delicately tornate, and 

 assume a lateritial pattern, resembling layers of minute bricks, 

 laid regularly, some being of chalky-white consistency. The 

 substance of the shell, below the umbones especially, is peculiarly 

 massive. Each valve is ornamented with three or four con- 

 spicuous longitudinal rays. "Within, the surface is white, 

 shining, beautifully stained with red round the posterior mus- 

 cular impression, the pallial line being conspicuous and 

 sinuous ; the hinge is thickened ; the cardinal teeth and the 

 posterior lateral large, the anterior exceedingly small ; the 

 margins of the valves being serrate within. 

 * efi^piQfjs, heavy. 



