26 



SoLECURTUS ABBREYiATUS. T. tenuis, elongato-rhomboidea com- 

 pressa, striis incrementi insculpta, sulco radiante obliquo albido-mar- 

 ginato excepto ; umbonibus minimis medianis : margine dorsali antica 

 recta, declivi ; extremitate antica oblique retrorsum truncata ; angulo 

 dorsali postico declivi ; angulo postico ventrali rotundato ; margine 

 ventrali incurvata. Long. 45 ; lat. 10 ; alt. 20 millim. Inhabits Hong 

 Kong. W. S. 



SoLECURTUS STRiGOSUS. T. tenuis, compressa, transverse ob- 

 longa, concentrice striata ; epidermide flavo-viridi, postice verticaliter 

 rugosa ; umbonibus minimis ad quadrantem anteriorem sitis ; margine 

 dorsali anticfi declivi ; extrem. antica oblique retrorsum truncata ; 

 angulo superiori acuto ; extremitate postica acute rotundata ; margine 

 ventrali incurvata ; declivitate umbonali obtuse angulata. Long. 50 ; 

 alt. 7 ; lat. 7 millim. Inhabits Whampoa. W. S. 



SoLECURTUS DEBiLis. T. parva, tenuis, lucida, alba, oblongo- 

 ovalis, compressa, concentrice striolata, striis in medio obliquis, epider- 

 mide flavescente tenuissima hie illic induta ; umbonibus prope trientem 

 longitudinis sitis, postice excavatis ; extrem. antica rotundata ; extrem. 

 posticii acutiori ; margine dorsali posticfi demum declivi ; margine ven- 

 trali quantulum concava. Long. 25 ; lat. 5 ; alt. 7 millim. Inhabits 

 Port Lloyd, and Loo Choo Island. Capt. Rodgers. 



SoLEN STRICTUS. T. valde elongata, marginibus fere paraUelis ; 

 marg. dorsali lente declivi ; extremitate antica oblique truncata ; ex- 

 trem. postica quadrata, angulis rotundatis; epidermide nitidu, flavido- 

 cornea, linea diagonali inconspicuH ; dente terminali ; cavositate 

 incarnata. Long. 4.5 ; alt. 0.7 ; lat. 0.5 poll. Inhabits Hakodadi Bay. 



w. s. 



General features like S. corneus Lk, but much larger, and propor- 

 tionally more slender. 



SoLEX GRACILIS. T. tcnuis, gracilis, valde elongata, subcylin- 

 drica, vix arcuata, epidermide fiavo-virescente nitida induta ; margini- 

 bus parallelis ; extrem. anticali oblique truncata, sulco subterminali 

 fere obsoleto ; extrem. posticali oblique antrorsum truncata, angulis 

 rotundatis ; dente cardinali terminali, in utraque valva singulo. Long. 

 4.5 ; alt. 0.6 ; lat. 0.4 poll. Inhabits Hakodadi, on sandv beaches. 

 W. S. 



The nearly straight, proportionally slender form, and very oblique 

 anterior truncation afford obvious characters. 



Mach.era sodalis. T. fragilis, compressa, clongato-ovata, pur- 

 puraseens, epidermide tenui fusco-cornea induta ; umbonibus ad quad- 

 rantem anteriorem sitis, conspicuis, acutis; extremitate antica late 

 rotundata, retrorsum sensim angustata ; pagina interiori purpuras- 

 cente ; costa cardinali alba antrorsum inclinatfi et inflecta. Long. 

 32 ; lat. 7 ; alt. 22 millim. Inhabits Hakodadi Bay. W. S. 



