PLEUROTOMA. 



Plate IX. 



Species 70. (Mus. Stainforth.) 



Pleurotoma Owenii. Pleur. testa elongato-cylindra- 

 ced, apice acuto, pallide cinered ; anfractibus con- 

 verts, striis et nodulorum seriebus duabus cingulatis. 

 ultimo infra) subtilissime noduloso-striatis ; canali 

 brevissimo. 



Owen's Pleurotoma. Shell elongately cylindrical, 

 apex sharp, pale ash-colour ; whorls convex, encir- 

 cled with strise and two rows of white nodules, 

 lower portion of the last whorl striated with very 

 fine nodules ; canal very short. 



Gray, MSS. (private cabinet). 



Hab. East Coast of Africa ; Gray. 



The specimen in Mr. Gray's cabinet is of unusually 

 large size, at least one-third longer than that selected 

 for illustration. 



Species 71. (Mus. Hinds.) 



Pleurotoma Stromboides. Pleur. testd abbreviuto- 

 fusiformi, apice acuto, fulvd ; anfractibus medio an- 

 gulatis, nodulis compressis ad unguium biseriatim 

 cinctis, supra concavis, Icevibus, anfractu ultimo sub- 

 alato, granoso, labro margine subincrassato ; sinu 

 lato ; canali vix elongato, recurvo. 



The Strombus-like Pleurotoma. Shell shortly fusi- 

 form, apex sharp, yellowish ; whorls angulated in 

 the middle, encircled at the angle with a double 

 row of compressed nodules, above the angle con- 

 cave and smooth, last whorls slightly winged, 

 lower portion granulated ; lip rather thickened at 

 the edge; sinus broad; canal a little elongated, re- 

 curved. 



Sowerby, Genera of Shells, Pleurotoma, f. 4. 



Hab. Bay of Panama (found in mud at the depth of 

 seven fathoms) ; Hinds, 



There is always a small white callosity on the body- 

 whorl of this shell. 



Species 72. (Mus. Gray.) 

 Pleurotoma tuberculata. Pleur. testd fusiformi, pal- 

 lida cinereo-olivaced; anfractibus superne concavis, fu- 

 niculo rubido-maculalo cingulatis, medio tuberculatis, 

 tuberculis interstitiis rubidis, infra rotundatis, granu- 

 losis ; canali subclongato. 



The tuberculated Pleurotoma. Shell fusiform, pale 

 ashy olive-colour ; upper portion of the whorls 

 concave, encircled with a single reddish-brown 

 spotted cord, middle portion tuberculated, inter- 

 stices between the tubercles reddish brown, lower 

 portion of the whorls rounded, granulated ; canal 

 rather long. 



Gray, Zool. Beech. Voy., p. 120. 



Hab. ? 



The interstices between the granules are the same 

 colour as between the tubercles. 



Species 73. (Mus. Stainforth.) 



Pleurotoma tenuis. Pleur. testd fusiformi, tenui, 

 fulvescente ; anfractibus converts, medio nodoso-ca- 

 rinatis, supra Icevibus, concavis, infrh striatis, longi- 

 tudinaliter corrugato-costatis, costis irregulariter 

 confluentibus ; canali subelongato. 



The thin Pleurotoma. Shell fusiform, thin, yellow - 

 ish ; whorls convex, middle nodulously keeled ; 

 upper part concave smooth, lower part longitudi- 

 nally striated, and wrinkle-ribbed, ribs irregularly 

 flowing together ; canal rather long. 



Gray, Ann. and Mag. Nat. Hist. 



Pleurotoma corrugata, Kiener, &c. 



Hab. New Guinea ; Kiener. 



I have seen this species with the wrinkle-ribbed pecu- 

 liarity still more curiously developed than in the spe- 

 cimen here figured. 



Species 74. (Mus. Cuming.) 



Pleurotoma zonata. Pleur. testd subfusiformi, fus- 

 cescente ; anfractibus convexis, longitudinaliter albi- 

 costatis, parte inferior i interstitiis fusco zonatis ; ca- 

 nali breviusculo. 



The zoned Pleurotoma. Shell somewhat fusiform, 

 brownish ; whorls convex, longitudinally ribbed, 

 ribs white, the lower portion of the interstices being 

 distinctly zoned with dark brown ; canal rather 

 short. 



Gray, MSS. (private cabinet). 



Hab. Singapore (found in sand at the depth of seven fa- 

 thoms) ; Cuming. 



I have only seen two specimens of this interesting 



April 1843. 



