PLEUROTOMA.— Plate XI. 



other ; sinus nearly central ; canal straight and 



rather long. 

 Reeve, Pro. Zool. Soc, 1843. 



Murex Perron, Chemnitz, Conch., vol. x. pi. 164. 

 f. 1573. 



Hab. ? 



This interesting shell has been confounded by La- 

 marck with the P. spirata (vide PL VI. Sp. 44.). It dif- 

 fers from that species in being more erect and fusiform, 

 in the sutures of the whorls being less deeply chan- 

 neled, and in the lower portion of the last whorl being 

 crossed with about four or five narrow, well- developed 

 ridges. ^_ 



Species 95. (Mus. Cuming.) 

 Pleurotoma funiculata. Pleur. testd subobeso-fusi- 

 formi, turritd, pallide cinered, epidermide olivaceo- 

 viridesce/ite indutd ; anfractibus superne concavo-de- 

 pressis, lavibus, in medio nodosis, funiculis out liris 

 binis cingulatis, anfractu ultimo inferne noduloso- 

 lirato ; sinu Into ; canali breviusculo. 

 The corded Pleurotoma. Shell rather stoutly fusi- 

 form, turrited, pale ash-colour, covered with an 

 olive- green epidermis ; upper part of the whorls 

 concavely depressed, smooth, middle knobbed, and 

 encircled with a pair of cords or ridges, lower por- 

 tion of the last whorl nodulously ridged; sinus 

 broad ; canal rather short. 

 Valenciennes MSS., Mus. Jardin des Plantes. 

 Kiener, Icon., p. 24. pi. 16. f. 1. 



Hab. Gulf of California (found in sandy mud) ; Babb, R.N. 

 Having obtained a drawing and careful examination of 

 this shell described and figured by Kiener, I find it to be 

 very distinct from the P. olivacea, to which I incau- 

 tiously ventured to refer it on the publication of that 

 species (vide PI. IV. Sp. 27.). 



Species 96. 

 Pleurotoma lineata. Pleur. testd clavato-fusiformi. 

 solidd, spird elatd, mucronatd; luteold vel castaned, 

 lineis longitudinalibus, undulato-angulatis, spadiceis, 

 plus minusve vivide pictd ; canali longiusculo ; colu- 

 mella superne callosd. 



The lineated Pleurotoma. Shell clavately fusiform, 

 solid, spire raised, pointed ; yellowish or chestnut 

 colour, more or less vividly painted with waved, 

 angular, brown lines ; canal rather long ; a solid 

 white callosity on the body whorl. 



Lamarck, Anim. sans vert., vol. vii. p. 93. 



Variety a. (Fig. 96 b, Mus. Stainforth.) 

 Testa luteola, lineis vividis, latis. 

 Shell yellowish, lines vivid and broad. 



Variety /3. (Fig. 96 c, Mus. Hankey.) 

 Testa medio coarctata, castanea, lineis subindistinctis. 

 Shell contracted in the middle, dark chestnut colour, 

 lines rather indistinct. 



Variety y. (Fig. 96 a, Mus. Stainforth.) 

 Testa gracilior, lineis numerosis, subtilissimis. 

 Shell more slender, lines numerous, very fine. 

 Hab. Cabenda, west coast of Africa (found at the depth 

 of five fathoms in mud washed down by the waters 

 of the Congo) ; Hankey. 

 The club-like peculiarity of this shell arises from the 

 solid colourless matter which the animal deposits in its 

 course of growth for the lodgement of one whorl upon 

 the other. 



Species 97. (Mus. Gray.) 



Pleurotoma umbilicata. Pleur. testd oblongo-turritd, 

 pallide luteold, basi umbilicatd, spird acuminata; 

 anfractibus transversim lineariter insculptis, superne 

 depressis, infra longitudinaliter costatis, costis pro- 

 minentibus, subdistantibus ; labro sinuato-effuso, sinu 

 lato ; canali brevissimo. 

 The umbilicated Pleurotoma. Shell oblong, turrited, 

 pale yellowish or stone-colour, base umbilicated, 

 spire acuminated ; whorls linearly engraved across, 

 upper part depressed, below longitudinally ribbed, 

 ribs prominent, rather distant ; lip sinuately spread, 

 sinus broad; canal very short. 

 Drillia umbilicata, Gray MSS. (private cabinet). 



Hab. ? 



The ribs of this shell, which is very peculiarly umbi- 

 licated, assume almost the form of tubercles. 



