104 



suture, either as a mere notcli or narrow slit, or it is at some 

 distance from it. 1st. On a keel which becomes nodose, 

 granular or imbricately squamose. Or, 2nd. By the side of 

 the keel, next the suture, or outside. On this particular the 

 striation and ornamentation I have found depend very much. 

 For convenience also we may divide the genus into : — 1. 

 Plicate, or ribbed. 2. Spirally keeled. 3. Plicate and 

 keeled. Each division may also be subdivided thus : — A. 

 SpirQ longer than the body whorl. B. Body whorl longer 

 than the spire. In New Zealand the plicate division is repre- 

 sented best. Eleven fossil species are known, two of which are 

 living, and there are four living forms in the same seas, and 

 one which Captain Hutton refers to DapJmella, the Drillia 

 (Maiiffelia) letoiirnenxiana of Crosse. It does not correspond 

 with the Daphnella genus referred to here. We find in the 

 Australian tertiaries none of those mitrae like forms of Europe 

 such as P. ramosa, Bast., neither is the style of ornamentation 

 that of P. granulocincta, Miinst, P. Sclireihersii, Horn. The 

 shells are simply granular, and not often ribbed as far as they 

 have been examined. 



Pleueotoma pullulascens. n.s. Shell small, slender, 

 rather solid, fusiformly turretted, spire nearly twice exceed- 

 iug body whorl, apex naticiform shining, smooth of li turns ; 

 whorls (exclusive of apex) 6, angular, equally, distantly, 

 spirally lirate ; upper ones subplicate with rounded un- 

 dulating ribs ; all finely long, undulately striate ; suture with 

 a distinct margin much broader than the liree ; sinus a rather 

 deep broad crescentic bend, occupying all the space between 

 the angle of the whorls and .the suture, which is slightly 

 sloping, lirate and very distinctly striate with the lines of 

 growth ; aperture sub ovate, outer lip simple ; inner lip thick- 

 ened distinct, enamelled ; canal short, not recurved. Long. 8, 

 Lat. 2|. 



This is a form which closely allied to P. crispata, San. (cited 

 by Homes as agreeing with Mures turricula, Brocchi, and P. 

 turrella, Beineri, Basteroti, Tarentini, of other authors) the 

 differences being that is smaller, the canal is not contorted, 

 and the granular apex. There is no known form like it existing 

 on our coasts. 



PiiERTjROTOMA SANDLEEOiDES. U.S. Shell small, somewhat 

 solid acutely fusiform, turretted, spire twice longer than body 

 whorl, apex naticiform, smooth shining ; whorls 7, rounded, 

 accurately, closely, diagonally plicate ; lirse solid, smooth, 

 shining, &-12 in a whorl ; sinus deep and conspicous, aperture 

 narrow much contracted anteriorly, canal short, outer lip thin, 

 and curved so as to appear thickened and conspicuous, colu- 

 mella slightly twisted, base spirally striate. Long. 7|, Lat. 2. 



