THE MOLLUSCA OP TOERES STRAITS. 191 



ficies higbly coloured, and somewhat stunted and iucrassate. 

 Eeddish ocliraceous without, pure milky-white witMn ; marginal 

 teeth acute and red-tipped. 

 Station 8, Albany Pass. 



344. Caedium (Teachycaedium) maculostjm, Wood. 

 Station 2, Warrior Island. 



345. Caeditjm (Teachtcaebitim) eubicu]S"dum, Bve. 

 Station 5, Boydong Cays. 



346. Caedium (Teach stcardium) rugosum, Lam. 

 Station 5, Boydong Cays. 



346 a. Cardium (Teachycaedium) seeeioostatum, sp. n. 

 (PI. 11. fig. 20.) 



C testa ovata, crassiascula, cinereo-alba, fere sequilaterali, 

 umbonibus incur vis, contiguis ; valvis longitudinaliter costatis, 

 costis ad quadraginta, prominulis, delicate serrulatis, antice et 

 postice squamulosis, interstitiis excavatis, margine dorsali utrin- 

 que leniter declivi, regulari, lateribus posticis, simul ac anticis 

 marginem ad ventralem rotundatis ; intus cinereo-alba, circa mar- 

 gines striato-dentata ; dentibus cardinalibus fortibus, lateralibus 

 prominulis. Alt. 20, lat. 18, diam. 12 mm. 



Station 4, Ormans Eeef ; Station 13, Murray Island. 



Several valves of a distinct species we have been quite unable 

 to match. The peculiarly serrated, squarely-set ribs, some forty 

 in number, are characteristic. The interstices are deeply ex- 

 <;avate, the umbones not very prominent, contiguous. Shell 

 almost equilateral, the dorsal margin on each side of the umbones 

 gently rounded off, both posteriorly and anteriorly, towards the 

 ventral margin. Within, the shell is ashy-white, towards the 

 margins striato-dentate, hinge teeth strong, laterals prominent. 



Three or four examples. 



347. Caedium (Teachycaedium) teanscekdens, sp. n. 

 (PI. 11. fig. 21.) 



C. testa ovata, delicata, arctissime et pulcherrime longitudina- 

 liter tenuicostata, costis circa octo et quinquaginta, umbonibus 

 Isevibus, nitidis, contiguis, paullulum antice inversis ; valvis con- 

 vexis, margine dorsali utrinque rapide declivi, postice et antice 

 leniter marginem apud ventralem rotundatis, superficie pallide 



