OF NEW SOUTH WALES. 265 



margine rotundato spiraliter circumscripta. Long. 4, lat. 2| 

 mil. Hab. Cape Solander, Botany Bay. J. Brazier. 



Shell small subpellucid, spire slightly exsert, saturated brown, 

 shining, whorls 4, rapidly decreasing, spirally regularly keeled 

 and thickly cancellate, with oblique lirae which pass over the 

 rounded keels ; whorls 13, apex smooth, shining, white, diapha- 

 nous aperture entire, circular, anteriorly unicarinate, outer lip 

 thin, acute, posteriorly globosely arched and produced ; inner lip 

 straight, acute, furnished with a conspicuous tooth, umbilicus 

 narrow, deep, spirally circumscribed with a rounded margin. 



Drillia tricarinata. 



T. parva, elongato-fusiformi, angusta, turrita, spira quam apertura 

 longiori, opaca, alba pallidissime fulva. zonata ; anf. 6 (nucleo 

 tumide obtuso, \\ anfr. incluso) convexis, in spira tenuiter tricari- 

 natis, interstitiis, latis, regulariter concavis, ultimo anfr. tricarinato 

 ct lirato, sutura una carinarum insignita ; apertura ovata, postice 

 late profundoque sinuata, labro incrassato, labio encausto, exacte 

 definitOf canali lato, recto, sat brevi, basi concava, spiraliter multi- 

 lirata. Long. 6, lat. 2 mil. 



A small banded shell without plaits, which is unusual in the 

 genus, but it has three delicate keels, one of which is on the 

 suture, and the spaces between are shallow concave grooves. 

 The sinus is entirely posterior, is wide and deep, and the outer 

 lip is thickened 



RlSSOINA CRETACEA, U.S. 



T. parva, turrita, pyramidali alba polita sed periostraca cretacea 

 quasi obtecta ; anfr. 7, convexis, crebre plicatis ; plicis validis, acutis 

 a sutura ad suturam pertingentibus ; suturis bene impressis ; apice 

 Icevi tumido 1| anfr., apertura angusta, labio crasso ; basi IcBvi. 

 Long. 6, lat. 1^ mil. 



I don't know any distinguishing character for this Bissoina, 

 except its chalky periostraca. It is much smaller than H. nivea 

 but larger than R. gertrudis, nobis; is neither pellucid nor 

 margined at the suture. Hab. Off Port Jackson, 45 fathoms. 

 J. Brazier. 



