FROM THE SOLOMON ISLANDS. 543 



of the fifth and seventh transverse lirse, reckoning from the suture, 

 are also bright yellow, the upper ones being situated in the pur- 

 plish band which encircles the whorl, and the lower ones just 

 beneath it ; and in specimens from the Sandwich Islands those of 

 the fifth, sixth, and seventh series are yellow. 



23. Nassa bicallosa, sp. nov. PI. XXX. fig. 1. 

 Testa acuminato-ovata, turrita, sordide albida, infra suturara et supra 

 tergum livida ; anfractus 10, superiores longitudinaliter oblique cos- 

 tati et paululum infra suturam linea iinpressa spirali sulcati, inferiores 

 supra coronati, laeves ; anfr. ultimus uiaguus, laevis, coronatus, linea 

 incisa superne baud einctus, circa basim striis transversis 10-12 in- 

 sculptus ; sutura profunda, canaliculata ; apertura subovata, intus 

 albida vel pallide fuscescens ad suturam et basim, et paululum labri 

 margine saturate fusco cincta vel zonata ; labrum margine teniie, in- 

 ferne denticulis, superne ad sutui'am subprofunde incisum, exti'a albo- 

 varicosum, intus denticulo-liratum ; columella valde arcuata, callo 

 crassiusculo superne subtuberculato inferne dentiformi, producto 

 amicta, et supra callum, callo crenulato secundo notabili ornata ; 

 canalis brevissimus, mediocriter latus. Long. 24 mill., diam. 12. 

 Hah. West Australia, [Brazier) ; Swan River, Cape Natal. 

 This species somewhat resembles N. algida, Eeeve ; but there 

 are several peculiarities which well distinguish it from that form. 

 The spiral striation which encircles the upper whorls does not 

 extend to the last. The tubercles forming the coronation gradu- 

 ally enlarge as the whorls increase. The most remarkable pecu- 

 liarity in this species is the second callosity upon the columella. 

 It is parallel with the margin of the other, is crenulated or den- 

 tate, and extends upward and curves inwards within tlie aperture 

 upon the wall of the body-whorl ; and the lower end of the colu- 

 mella stands out in the form of a prominent callous tooth. The 

 slit in the sutural end of the labrum forms, with the tubercular 

 callosity of the columella, a narrow well-defined sinus. The in- 

 terior of the aperture is usually whitish or brownish white ; but 

 along the suture, and around the base, and in a line with the 

 margin of the labrum, at a little distance from it, it is stained or 

 striped with very deep brown. The lirations within the lip are 

 about twelve in number, and do not quite extend to the margin 

 of it. 



24. N. Marratii, sp. nov. PI. XXX. fig. 4. 



Testa ovata, superne acuminata, albida vel flavescens, maculis irregula- 

 ribus rufo-fuscis picta et lineis spiralibus rufo-fuscis cincta : anfractus 



