166 Mr. G. B. Sowerby on 



munitus; rostrum elongatum, irregulariter tortuosum. Apertura 

 ovalis, intus rufo-violacea, leviter sulcata ; labruui incrasaatum, 

 intus sex-nodulosum ; columella leviter arcuata, tenuiter albo 

 callosa, transversim anguste granoso lirata, infra medium 

 biplicatum. 

 Long. 37, lat. 18 mm. 



JIab. Kii, Japan. 



Compared with Reeve's Triton exaratus, this shell is of 

 a much narrower and less angular form. It somewhat 

 approaches T. elongatus, also of Reeve. 



Natica [Polinices) tenuicala, sp. n. (PI. X. fig. 3.) 



Testa subglobosa, tenuis, umbilicata, pallide luteo-fuscescens, postice 

 nigro-fusca; spira breviter conica ; anfractus 4|, convexi, lceves, 

 sutura angustissime canaliculata sejuncti; anfractus ultimus 

 amplus, inflatus, rotundatus, oblique irregulariter rugosus. Aper- 

 tura ampla, intus fusca, antice albo radiata ; labrum tenue, 

 arcuatum ; columella rectiuscula, postice tenuiter callosa ; um- 

 bilicus profundus, mediocriter latus. 



Long. 37, maj. diam. 34 ; apert. long. 30, lat. 18 mm. 



Hah. Nomuro, Japan. 



This shell is hardly comparable with any known species. 

 It is of a light substance and has somewhat the external 

 appearance of a species of Amaura. The operculum is 

 unfortunately wanting. 



Pentadaefylus fusco-imbricatus } sp. n. (PI. X. fig. 4.) 



Testa fusiformis, anguste rimata, pallide luteola, fusco maculata, 

 profuse squamulata, longitudinaliter costata, squamis aculeatis 

 fuscis supra costas instructa ; spira elata, acuta ; anfractus 7, 

 obtuse angulati ; sutura vix conspicua ; anfractus ultimus supra 

 convexus, infra medium constrictus. Apertura elongata, leviter 

 sinuata, antice angusta, postice latior ; labrum leviter incrassatum, 

 fimbriatum, extus aculeatum, intus quinque denticulatum ; canalis 

 mediocriter latus ; columella kevis, supra arcuata, infra leviter 

 sinuata. 



Long. 19, diam. 12 mm. 



Hah. Hawaii. 



Only four specimens of this species were sent to us some 

 years ago from Hawaii. The one I have selected as the type 

 is the most perfect, and the conspicuous brown scales are 

 sharper and more prominent than in the others. The species 

 seems to vary considerably, and I delayed describing it in 

 the hope of getting more specimens, which, however, have 



