THE 



JOURNAL OF MALACOLOGY. 



No. ;5. OCTOBER 20x11, 1003. Vol. X. 



DESCRIPTIONS OF NEW SPECIES OF NASSA, 

 PURPURA, LATIRUS, VOLUTA, CONUS, STOMATELLA 

 AND SPONDYLUS. 



By G. B. SOWERBY, F.L.H. 

 (Plate V.) 



Nassa optima, n.sy. 



PL V, figs. 1, 2. 



Testa ovato-acuminata, crassa, polita, cinerea, albo unifasciata ; s})ira 

 elata, acuta ; anfractus 8, primi li laeves, sequentes plana to convexi, 

 costis numcrosis crassis leviter obliquis supcrne nodulosis instructi, siilcis 

 intormptis brevibus paucis spiraliter sculpti, sutura breviter canaliculata 

 scjuncti ; penultimus magis convexus, costis evanidis ; ultimus § longitu- 

 dinis testae aequans, ventricosus, laevis, supernc nodiilis inac(iualibus 

 paulo elevatis coronatus, basim versus liratus, canaliculatus, rostio 

 brevissimo obliquo acutimarginato ; apertura latiuscula, lamina coluniel 

 lari callosa, expansa, intus corrugata, supra uniplicata, peristoma ad 

 marginem acutum, extus late plicato varicosum, intus lira turn ; caualis 

 anticus latiusculus, recurvus, posticus brevis. 



Long. 25, diam. 15 millim. 



Hab.—N.W. Australia. 



A number of spe(;imens of this interesting species were received from 

 Mr. Bernard H. Woodward, of the West AustraUau Museum. Compared 

 with N. cororiata, Brug., the body whorl is much shorter, the spire longer 

 and more acute, the upper whorls being more closely and distinctly plicate; 

 coronation is only faintly indicated. 



JouRN. OF Malac, 1903, vol. X. No. 3. 



