FROM THE SOLOMON ISLANDS. 545 



29. Nassa tri nodosa, sp. nov. PI. XXX. lig. 2. 



Testa globoso-conica, crassiuscula, livido-cinerea, fascia angusta utrinque 

 fusco marginata vel lineata ornata ; anfractus 8 sutura subprofunda 

 undulata sejuncti, infra earn fortiter marginati et leviter excavati, pau- 

 lulum supra medium aliquanto angulati, deinde convcxiusculi, costis 

 ad 10 subobliquis, mediocriter tenuibus, superne attenuantibus ad an- 

 gulum acute nodosis instruct!, et liris spiralibus 4-6 inter supraque 

 costas continuis ornati ; anfr. ultimus infra angulum superiorem con- 

 caviis et triangulatus, costis longitudinalibus ad angulos duos nodosis 

 et infra angulum infimum obsoletis instructus, liris transversis circiter 

 20 cinctus ; apertura parva irregulariter ovata fuscescens, zona alba 

 externa fasciata ; labrum margine tenui extra intusque incrassatum versus 

 basira baud profunde sinuatum, intus album liris tenuibus albis 6-7 

 armatum ; columella arcuata callo mediocriter crasso inferne incras- 

 sato amicta, superne tuberculo parvo munita; canalis angustns. Long. 

 13 mill., diara. 7. 

 Hab. San Christoval, Solomon Islands. 



The marginafcion of the wliorls beneath the suture is very de- 

 cided, and in some specimens appears to consist of the two 

 uppermost spiral lirations. It is remarkable that the upper whorls 

 below the superior angle are convex, whilst the last is concave. 

 The ribs on the body-whorl are noduled in three places, the no- 

 dules not being very prominent, particularly the two lower ones. 

 The middle one is situated about the centre of the whorl, and 

 the lowest one only at a little distance below it and not so remote 

 as the uppermost. iV. coronula, A. xidams, is of very much the 

 same form as this ; but its much thicker costations, finer transverse 

 iirations, and the absence of the keel-like margination beneath the 

 suture at once define its distinctness. 



30. N. INTERLIRATA, sp. nov. PI. XXX. fig. 6. 



Testa parva, acuminato-ovata, saturate fusca, infra suturam nigrescens ; 

 anfractus 7, leviter convexi, superiores tres Iseves politi, cajteri costis 

 arcuatis vel flexuosis confertis circiter 24 et liris spiralibus teuuibus 

 6-6 inter costas ornati ; anfr. ultimus liris spiralibus lS-1!) oniatus; 

 lirse infinite 4 circa caudam brevissimam fere contigmv; apertura 

 parva ovata, intus fusca ; labrum extra late varicosum, intus deuticulis 

 7 munitiim, versus basim baud profunde sinuatum ; columella callo 

 tenui induta, ai-cuata, superne tuberculum parvum elongatum gerens ; 

 canalis brevissimus, angustus. l.ong. 6A mill. ; diam. 3^. 



Hab. San Christoval, Solomon Islands. 



This is very distinct from any species hitlierto described. Ti\o 

 dark uniform brown colour, except just beueatli the suture, (wliore ;i 



LINN. JOURN. — ZOOLOGY, VOL. XII. 30 



