134 Zoological Society. 



bus, maculis fuscis perparce pictis, carind super a valde maximd, 

 labro fissurd parvd, suhcentrali ; canali recto, spires longitudinem 

 aquante. Long. 2 ; lat. J poll. 



Hab. Panama, St. Bias, Gulf of Nicoya, &c. 



This shell is of a straight solid growth, and cannot well be con- 

 founded with any species hitherto described. 



Pleurotoma papalis. Pleur. testa fusiformi, acute turritd, pal- 

 lide luteo-hrunnescente, anfractihus superne concavis, longitudina- 

 liter leviter liratis, liris numerosis, anfractu ultimo pallide alba- 

 fasciato ; canali brevi. Long. 1 J ; lat. ^ poll. 

 Pleurotoma mitrceformis var., Kiener. 



Hab. .^ 



After carefully examining one or two specimens of this shell, which 

 Kiener describes as a variety of the Pleurotoma mitrceformis, I am 

 forced to the conclusion that it is specifically distinct. 



Pleurotoma obesa. Pleur. testd obeso -fusiformi ; spird turritd, 

 anfractibus luteolis, superne albis, lineis fulvis , obliquis, longitu- 

 dinaliter venosis ; labro acuto, sinu subcentrali ; canali mediocri, 

 brevi subith reflexo. Long. Ig ; lat. \ poll. 



Hab. ? 



The solid obesity of this shell has suggested the above title. 



Pleurotoma virginea (Beck, MSS.). Pleur. testd fusiformi- 

 turritd, pallide luteold ; anfractibus in medio angulatis, tuberculis 

 minutis albis seriatim cinctis ; anfractu ultimo multiseriatim gra- 

 nuloso ; canali mediocri, leviter recurve. Long. 1^ ; lat. \ poll. 



Hab. Mouth of the Gambia. 



This shell, though comparatively common in our collections, does 

 not appear to have been hitherto described. 



Pleurotoma annulata. Pleur. testd solidd, subulatd, brunned; 

 anfractibus leviter convewis, liris Icevibus, pallidioribus, numerosis, 

 annulatim cinctis; canali subelongato. Long. IJ; lat. \ poll. 

 This shell is not very much unlike the Pleurotoma Deshayesii ; it 

 may however be readily distinguished from that species by the num- 

 ber of well-marked ring-like ridges by which the entire surface is 

 encircled. 



Pleurotoma catena. Pleur. testd elongato-fusiformi, turritd, acu- 

 minata, flavido-grised ; anfractibus medio valde convewis, quasi 

 subith tumidis, tuberculis eximiis, albis, obliquis, seriatim coro- 

 natis ; labro tenui, sinu lato ; canali elongato, recto. Long. 2\ ; 

 lat. \ poll. 



Hab. ? 



The leading feature of this new and very distinct shell is the bright 

 perlaceous series of link-shaped tubercles which run round the peri- 

 phery of the whorls. 



Pectunculus giganteus. Pect. testd valde convexd (juniore de- 

 pressd), solidd, giganted, longitudinaliter striatd, striis contiguis, 

 regularibus, et sulcata sulcisfere obsoletis ; albd, inferne castaneo- 

 tinctd, superne maculis rubido-fuscis numerosis, undatis, contin- 



