PLEUROTOMA.— Plate VIII. 



subtilissime sulcata et striatd ; anfractibus longitudi- 

 naliter costatis, superne subdepressis ; sinu lato. 



The alabaster Pleurotoma. Shell turrited, snowy 

 white within and without, sometimes faintly tinged 

 with rose, transversely very finely grooved and stri- 

 ated ; whorls longitudinally ribbed, somewhat de- 

 pressed next the suture ; sinus broad. 



Reeve, Pro. Zool. Soc, 1843. 



Hab. Island of Siquijor, Philippines (found in loose co- 

 ral sand on the reefs at low water) ; Cuming. 

 The sculpture of this shell is exceedingly delicate, the 



cross grooves looking as if they had been graved with 



an etching point. 



Species 66. (Mus. Dennison.) 



Pleurotoma flavidula. Pleur. testd turrito-subulatd, 

 longitudinaliter suboblique plicatd, plicis antic'? evani- 

 dis ; transversim striatd, striis super plicis nodulo- 

 sis ; canali brevi, subrecurvo ; sinu lato. 



The yellowish Pleurotoma. Shell sharply turrited, 

 longitudinally rather obliquely plaited, plaits dis- 

 appearing anteriorly ; transversely striated, stria? 

 knobbed in passing over the plaits ; canal short, 

 slightly recurved ; sinus broad. 



Lamarck, Anim. sans vert., vol. vii. p. 92. 



Chemnitz, Conch., vol. xi. pi. 190. f. 18-29 and 1830. 



Hab. Chinese and Japanese Seas. 



There is a striking variety of this shell of a dark 



brown colour, the form and general appearance of which 



are the same. 



his " Genera of Shells" as having all the appearance of 

 a fresh-water Melania. 



Species 67. (Mus. Walton.) 



Pleurotoma semicostata. Pleur. testa turritd, albidd, 

 epidermide olivaceo-luted, corned, indutd ; anfractibus 

 convexis, semicostatis, costis latis, superne nodulosis ; 

 aperturd ovatd ; labro simplici, sinu lato. 



The half-ribbed Pleurotoma. Shell turrited, white, 

 covered with a horny olive-yellow epidermis; whorls 

 convex, ribbud half-way, ribs broad, and nodulous 

 at the upper extremity; aperture ovate; lip simple, 

 sinus broad. 



Kiener, Icon, p. 39. pi. 19. f. 1. 



Hab. ? 



This is probably the shell alluded to by Sowerby in 



Species 68. (Mus. Cuming.) 



Pleurotoma Buccinoides. Pleur. testd turritd, pallidi 

 ferrugined, epidermide corned, fusco-nigricante, in- 

 dutd; anfractibus leviter convexis, longitudinaliter 

 costellutd, costellis superne nodulosis, ante suturas 

 terminatis ; aperturd basi emarginatd. 



The Buccinum-like Pleurotoma. Shell turrited, pale 

 rusty brown, covered with a dark horny blackish 

 brown epidermis ; whorls slightly convex, longitu- 

 dinally ribbed, ribs with the upper extremity nodu- 

 lous, terminating before the sutures ; aperture with 

 the base emarginated. 



Lamarck, Anim. sans vert., vol. vii. p. 94. 

 Boletus turbinatus, Martini. 

 Buccinum sinuutum, Born. 

 Buccinum phallus, Gmelin. 



Hab. ? 



This species, like the former, is evidently an inha- 

 bitant of fresh or brackish water, having the complete 

 external character of a Melania, 



Species 69. (Mus. Stainforth.) 



Pleurotoma auriculifera. Pleur. testd oblongo-ovatd, 

 subventricosd, albidd, sapissime unizonali; anfracti- 

 bus superne leviter angu/atis, squamis grandibus corn- 

 plicatis, auriculi-formibus, distantibus, coronatis; an- 

 fraclu ultimo serie tuberculorum fascidque adustd 

 cincto. 



The eared Pleurotoma. Shell oblong-oval, rather 

 ventricose, white, generally single banded ; whorls 

 slightly angulated round the upper part, which is 

 coronated with large, distant, ear-shaped, folded 

 scales ; last whorl encircled with a row of tuber- 

 cles and generally a single brown band. 



Lamarck, Anim. sans vert., vol. vii. p. 91. 

 Strombus lividus, Linnreus. 

 Clavatula auriculifera, Enc. Meth., pi. 439. f. 10 «. b. 



Hab. Philippine Islands. 



Specimens of this remarkable shell, of different ages, 

 were collected by Mr. Cuming at several of the above- 

 mentioned islands. The ear-shaped scales gradually 

 increase in importance as the shell increases in growth. 



