402 



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 laevibus, 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. 

 uucleosis 2 helicoideis ; normalibus 4 ventricosis, antice aurantia- 

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

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

 interstitiis quadratis, laevibus. Apertura suborbicularis ; labro 

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

 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 {o-Q) decussata, ad anfr. ultimum fills 

 10 quorum tribus anticis moniliferis et constrictione alteris sejunc- 

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

 labro acuto, varice externo suflfulto. 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, 

 sulcis concavis sejunctis ; anfr. 5 -\- ventricosis. Apertura rotun- 

 dato-ovalis, peritremate integro antice vix sinuato ; labro crasso, 

 expanso, carinis dentato, extrorsum varicoso. Axis 4; diam. 

 1 -{- millim. Dredged in Hong Kong Harbor. W. S. 



Curious for its dusky exterior and prominent keels like a mi- 

 nute Planaxis. 



