134 Zoological Society. 



bus, maeiilis fuscis perparce pictis, carind superd valde maximd, 

 labro fissxird parvd, subcentrali ; canali recto, spirce longitudinem 

 (Bqxiante. Long. 2 ; lat. •§ poll. 



Hub. 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. 



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

 lide luteo-brunnescente , anfractibus superrie concavis, longitudina- 

 llter leviter Uratis, liris numerosis, anfractu ultimo pallide albo- 

 fasciato ; canali brevi. Long. \^; lat. \ poll. 

 Pleurotoma mitnefonnis var., Kiener. 



Hah. ^ 



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

 Kiener describes as a variety of the Pleurotoma mitrceformis, 1 am 

 forced to the conclusion that it is specifically distinct. 



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

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

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

 brevi subitb refiexo. Long. 1|; 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- 

 nulosa ; canali mediocri, leviter recurvo. Long. \^ ; 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, suhulatd, brunned; 

 anfractibus leviter convexis, liris Icevibus, pallidioribus, numerosis, 

 annulatim cinctis ; canali subelongato. Long. 1^ ; 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 convexis, quasi 

 subitb 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 (Juniors de- 

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

 regularibus, et sulcata stilcisfere obsolelis ; albd, infernb castaneo- 

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



