135 



tuberculis inferioribus superni olbo maculatis ; anfractu ullimo 

 subdistorto, pone aperturam tubercido magno ; aperturd ovali, 

 labio externo tenui, sinuoso: long. 1'3, lat. 0'55 poli. 



Hab. ad Montera Chrisli Columbiae Occidentalis. 



Found under stones. — G. B. S. 



Pleurotoma Oxytropis. Pleur. testd turrito-suhdatd, hriin- 

 nescente ; anfractibus decem, spiraliter carinatis, carind mediand 

 albicante, conspicud, interstitiis decussatis ; aperturd. oblongd, ca- 

 nali recid, elongatd, emarginaturd laterali in carinam medianam 

 decurrente: long. 1*8, lat. O 5 poli. 



Hab. ad Panamam et ad Portam Portreram. 



Found in sandy mud at from thirteen to twenty fathoms' depth. — 

 G. B. S. 



Pleurotoma maculosa. Pleur. testd oblongo-fusiformi, tur- 

 ritd, albido-ccerulescerde, Jiisco maculosd ; anfractibus undecim, 

 Icevigatis, medio tuberculiferis, tuberculis uniserialibus ; apeiiurd 

 oblongd, emarginaturd laterali posticali {seu supra tubercula 

 ęffbrmatd) ,• canali brevi ; columeUd rectiusculd : long. 2'2, lat. 

 {}-6poll. 



Hab. ad Montem Christi Columbiae Occidentalis, 



One specimen only was dredged in sandy mud at a depth of six- 

 teen fathoms. The aperture is about two fifths of the length of the 

 shell.— G. B. S. 



Pleurotoma albicostata. Pleur* testd acuminato-pyramidali, 

 rosed; anfractibus novem, Icsvibus, longitudinaliter costatis, costis 

 conjertis albis ; aperturd brevi, emarginaturd posticali; canaU 

 brevissimd : long. 0*9, lat. 0'3 pdl. 



Hab. ad Insulas Gallapagos. 



A very elegant small species, found in fine coral sand at a depth 

 of six fathoras. — G. B. S. 



Pleurotoma clavata. Pleur. testd acuminato-pyramidali, 

 roseo-albicante ; anfractibus decem, Icevibus, longitudinaliter sub- 

 obsolete tuberculato-costatis ; aperturd brevi, latiusculd ; emargi- 

 naturd posticali : long. 1', lat. 0"3 poli. 



Hab. ad Aipixapi Columbiae Occidentalis. 



A fevr speciraens were found in sandy mud at a depth of ten fa- 

 thoms.— G. B. S. 



Pleurotoma bicolor. Pleur. testd oblongd, pyramidali,fuscd, 

 albicante cingulatd ; anfractibus sex vel septem, longitudinaliter 

 costatis, spiraliter sulcatis, costis postice tuberculiferis ; aperturd 

 brevi, margine crenatd, emarginaturd posticali; canali brevis- 

 simd : long. 0-85, lat. 0-3 poli. 



Hab. ad Panamam et ad Insulas Gallapagos. 



Found under stones at Panama, and dredged from a sandy floor 

 at a depth of eight fathoms at the Gallapagos Islands. — G. B. S. 



Pleurotoma splendidula. Pleur. testd elongato-pyramidali, 

 roseo-Jusceicente ; anfractibus undecim, Icevigatis, costis longitu- 

 dinalibus obliįuis, medio prominulis, siibconfertis, albis ; anjrac- 



