1863.] MR. A. ADAMS ON JAPANESE FOSSARIO^. HI 



Subgenus Couthouyia, A. Ad. 



1. Couthouyia decussata, A, Ad. Annals, I860. 

 Hab. Mino-Sima. 



2. Couthouyia reticulata, A. Ad. 



Fossar reticulatus, A. Ad. Proc. Zool. Soc. 1853, p. 186. 

 Hab. Seto-Uchi; Uraga. 



3. Couthouyia striatula, A. Ad. 



C. testa ovata, rimata, fusea, spira acuminata ; anfractihus ^\, 

 convexis, transversim striatis, lineis incrementi obsoletim irri' 

 pressis, sutnris profundis, apertura elongato-ovali ; lahio tenui, 

 arcuato ; labro margine integro, rima umbilicali angusta, elon- 

 gata, semUunari. 



Hab. Yobuko, 25 fathoms. 



This is a thin, transversely striated species, with a linear rimal 

 fissure, and with the spire much produced. 



4. Couthouyia plicifera, A. Ad. 



C. testa ovata, tenui, rimata, fusca, spira acuminata ; anfracti- 

 hus 4^, convexis, transversim tenuiter striatis, longitudinaliter 

 plicatis, plicis obliquis, tenuibus, subdistantibus, suturis caaali- 

 culatis ; apertura ovata; labio arcuato ; labro margine integro; 

 rima umbilicali angusta, lunata. , 



Hab. Yobuko. 



This is a small species, with plicate whorls and canaliculated su- 

 ture ; it is finely striated transversely, and is very thin, like most 

 shells obtained at any considerable depth. 



Genus 2. Isapis, H. & A. Adams. . 



1. Isapis lirata, A. Ad. Annals, 1860. 

 Hab. Mino-Sima. 



2. Isapis conoidea, A. Ad. 



I. testa ovato-conoidea, alba, solida, rimata, spira acuta, elatius- 

 cula ; anfractihus quatuor, 'planatis, transversim valde liratis, 

 liris subdistantibus, cequalibus, iyiterstitiis longitudinaliter con- 

 cinne clathratis ; apertura ovata; labio incrassato, superne 

 dente acuta transversa instructo ; labro margine acuto, integro. 

 Hab. Takano-Sima, in shell-sand. 



The form is conoidal, the tooth is at the upper part of the inner 

 lip, and the outer lip is not crenate. In other respects it somewhat 

 resembles /. ovoidea, Gould. 



Genus 3. Conradia, A. Ad. 

 1. Conradia cingulifera, A. Ad. Annals, 1860. 

 Hab. Mino-Sima; Uraga. 



