154 



regularly, obliquely, and distantly ribbed ; ribs narrow, ceas- 

 ing at tbe periphery of the last whorl ; lirae passing over the 

 ribs ; whorls 5, convex, coronate above, suture well impressed, 

 aperture rounded, outer lip thickened, inner lip erect, anter- 

 iorly thickened, canaliculate behind to the umbilicus. Long 

 Bay, Rev. H. D. Atkinson ; Blaekman's Bay, W. Petterd. 

 Obs. The peculiar pointed, narrow, rounded, ribs, are, as it 

 were, hidden under the lirse. The generic position of the 

 shell appears to me very doubtful. Dredged at 10 fathoms 

 sand. 



No. 65. RissoA (ceratia) maccoyi. n.s. R.t. minuta, elongata, 

 turrita, alba, suhpdlucida, undiqut tenuiter spiraliter lirata et obsolete 

 hngitud. striata ; sutv.ra constricta ; an/r. 6, declivis, siiperne subcana- 

 liculatis, convexls ; apice ? (decoll.) a.pertura integra, \ long, spires, ovata, 

 tenui, acuta, aniice eversa ; labio sxi?)-refltxo, -umbiUco simidante. Long. 

 3, lat. 1^ mil. 



Shell minute, elongate, turretted, white sub-pellucid, 

 slenderly, spirally lirate and obsoletely striate, lengthwise all 

 over the surface ; suture constricted ; whorls 6 ; sloping, sub- 

 canaliculate above, convex ; apex ? (decollate), aperture entire, 

 J length of spire, ovate, thin, acute, anteriorly everted ; lip 

 subreflected into a false umbilicus. Long Bay, Eev. H. D. 

 Atkinson ; Blaekman's Bay, W. F. Petterd. 



No. 66. Rlssoi>'A flindersii. n.s. R.t. fusiforme-turrita, minuta, 

 SOlida, pallidissirne carnca vel alba, apire pallidiore, Icevi et 1\ anfr. 

 rotundato ; anfr. 7, convexis, in medio tubercidato-costatis costls 8-12, et 

 suptrne costulis 26-2S coronatis ; apjertura integra, rotundata ; labro antice 

 producto ; labio conspicue quasi umbilicato reflexo, hasi convexa, long, 

 striata. Long. 3, lat. 1^ mil. 



A small fusiformly turretted species, mainly distinguished 

 by the margin of small ribs which crown the whorls. Some- 

 times a prolongation of the larger almost tuberculous ribs 

 enters into the series of the smaller ones, but on many 

 specimens they are entirely distinct. North West Coast, W. 

 F. Petterd. Not very common. 



No. 67. RissoiN'A ST. CLAR^. B.t. pyrmnidate turrita, latiusciUa, nitente, 

 tenui, pallide carnea, lineis tenuihus, et macidis rujis zonata ; anfr. 11, 2 ult. 

 Uei'ibtks, convexis, rdiquis, 'medio angulatis etconvezis, tuberculato costatis ; 

 eostis 9-10, nitentihus, basim versus proniinentioribus, sutura bene impressa ; 

 apice f anfr. spiraliter striato ; apertura integra, elongato-ovata ; basi 

 tUdivo-conve-xa, labro acuto, producto ; labio inconspicuo, refexo. Long. 9, 

 lat. 3i mil. 



Shell pyramidal, turretted, rather broad, shining, thin, pale 

 flesh color, zoned with slender lines, and red spots, whorls 11, 

 2 last smooth and convex, the rest angular in the middle and 

 tuberculately ribbed, ribs 9-10, shining, rather more prominent 

 towards thebase of the whorls, suture well impressed, apex of 

 3-4 whorls spirally striate, aperture entire, elongately ovate, 

 base sloping and convex, outer lip acute, produced, inner lip 

 inconspicuous, reflexed. North West Coast, W. F. Petterd. 



