146 



spatia striis tenuibus volventibus, insculptis, ultimo diraidiam 

 longitudinis testa? subrequante ; costa basali elevata acuta. Aper- 

 tura angusta, efFusa. Axis 6 ; diam. 2.5 millim. Inhabits Kikaia 

 and Ousima. W. S. 



Rissoina tornatilis. T. subulata, acuminata, straminea; 

 anfr. 9 -J- convexis, clathris acutis longitudinalibus circ. 22, filis 

 elevatis volventibus 4—5 insignibus. Apertura modica, antice vix 

 efFusa ; peritremate acuto, extus valde incrassato, crenato. Axis 



5.5 ; diam. 2 millim. Inhabits Loo Choo. W. S. 



Alvania acuminata. T. gracilis, turrita, straminea; anfr. 

 nucleosis 3 lrevibus, dein duobus bicarinatis, denique 4 normalibus, 

 tumidis plicis subacutis et carinis (3) eleganter cancellatis. Aper- 

 tura ovata ; labro tenui ; columella aurantiaco tincta. Axis 3 ; 

 diam., 1 millim. Inhabits Bonin Is. W. S. 



Closely allied to A. excurvata, Cpr. 



Alvania fenestrata. T. minuta, conica, lucida ; anfr. 

 nucleosis 2 helicoideis ; normalibus 4 ventricosis, antice aurantia- 

 cis, postice albidis, eleganter fenestratis (clathris angustis circ. 15, 

 liris spiralibus 2, quarta vel quinta circa basin haud decussatis) 

 interstitiis quadratis, kevibus. Apertura suborbicularis ; labro 

 continuo, acuto ; columella aurantiaco tincta. Axis 2 ; diam. 1 -4- 

 millim. Inhabits China Seas. W. S. 



Broad in proportion to its length, and exquisitely sculptured. 



Alvania quadrata. T. minutissima, alba, lanceolata ; anfr. 

 4 quadratim decussatis, clathris circ. 16, liris spiralibus 3, circa 

 basin tribus additis. Apertura subovalis ; labro incrassato. Axis 



1.6 ; diam. .8 millim. Inhabits China Seas. "W. S. 



The apex is not perfect enough to decide the genus positively, 

 but the aspect is essentially Alvanoid. 



Alvania pura. T. elongata, acuta, lactea, nitida, clathris 

 circ. 24 et filis volventibus (5-6) decussata, ad anfr. ultimum filis 

 10 quorum tribus anticis moniliferis et constrictione alteris sejunc- 

 tis ; anfr. 8 convexis. Apertura semicircularis, obliqua, efFusa 

 labro acuto, varice externo sufFulto. Axis 6 ; diam. 2 millim. 

 Inhabits Simoda. W. S. 



Alvania ligata. T. solida, acute ovata, subperforata; 

 epidermide rufa induta et carinis circ. 4 (ad anfr. ult. 7) cincta, 



