168 MESSBS. J. C. MELYILL AND R. STANDEE ON 



coarser, besides being, in proportion to its length, larger in all 

 its parts, and often spirally banded. 



140. Certthium (Yebtagus) pulchrtjm, A. Ad. 

 Station 2, Warrior Island. 



141. Cerithtum (Yertagus) Sowerbti, Kiener. 

 Station 5, Boydong Cays. 



142. Cerithium (Vertagus) vertagus, L. 



Station 5, Boydong Cays. 



143. Cerithium (Lampania) zonale, Brug, 

 Station 5, Boydong Cays. 



144. Cerithium (Colina) contractum, Sow. 



We consider this distinct from the type of Colina, 0. pinguis, 

 Ad., being attenuate, contracted, nine- or ten-whorled, the three 

 last whorls almost straight and of uniform thickness. The 

 species are now being frequently found in the North Indian 

 Ocean, and in other places, C. jpinguis having been formerly 

 considered peculiar to South. Africa. 



Station 13, Mer. 



145. Cerithium (Colin a) t^^iniatum, Soiv. 

 Station 13, Murray Island. 



146. BiTTIUM TORRESIENSE, Sp. U. (Pi, 10. fig. 6.) 



B. testa parva, elongato-cylindracea, pallide ochracea vel 

 fulva et albo-maculata ; anfractibus undecim, apicalibus inclusis 

 tribus, albidis (vel, in altero specimine, fulvis), uniformibus, per- 

 parvis, Igevibus, tribus his proximis pulchre gradatis, caeteris apud 

 suturas impressis, longitudinaliter recte gemmato-costulatis, 

 quinque ordinibus spiraliter dispositis, in specimine typico 

 gemmis vel tuberculis hie ochraceis, illic albidis, ultimo anfractii 

 ad basim liris quinque concentrice prsedito, apertura ovata, 

 canali brevissimo, peristomate tenui. Long. 5> lat. 2 mm. 



Station 14, channels between reefs, Mer. 



We have given much attention to the deep-sea forms of 

 Bittium, especially those described in the Eeports of H.M.S. 

 ' Challenger ' from N.E. Australia and the Torres Straits. 

 The only one which could challenge comparison with the shells 

 before us is B. xantJium *, Watson, but in the following 



* Cf. Voyage H.M.S. ' Challenger,' Gastropoda, vol. xv,, Zoology, p. 537. 



