89 



inSc. communiformis. Xipixappi,WestColumbia, Mr. Cuming. 

 This shell agrees wdth Pallas's figure, which is copied by 

 Martini, in every respect but size. 



24. Sc. OBLiQUA. (pi. xxxiii. f. 69.) Soto. Jun. 



T. tenui, pyramidali ; anfractibus obliquis, vix separatis; 

 varicibus numerosis, angulatis, laminatis. Colore albo. 



More slender and obhque than Sc. tenuis, with ribs less 

 angular. From Mr. Cuming's collection. 



25. Sc. OBESA. (pi. xxxiii. f. 70. 71.) Sow. Jun. 



T. ventricosa, brevi; anfractibus prominentibus, vix separ- 

 atis,rapide crescentibus, varicibus insequalibus, sub-distantibus, 

 leevibus, reflexis, prope suturam elevatis ; non-nulhs, incras- 

 satis, duphcatis : apertura oblique ovali, magna; umbilico 

 parvo. Colore inter varices pallide griseo, margine aperturae 

 luteo. 



A very ventricose species, with rapidly increasing whorls 

 and not very regular varices, simple in form, shghtly reflected. 

 The margin of the aperture has a yellow tinge. The whorls 

 do not quite touch each other — although the distance is 

 scarcely perceptible. Mr. Cuming and Mr. Metcalfe have 

 it from Austraha. 



26. Sc. VENOSA. (pi. xxxiii. f. 72, 73.) Sow. Jun. 



T. pyramidali, laevi, acuminata, imperforate ; anfractibus 

 sub-numerosis, prominentibus, vix contiguis ; varicibus 12, 

 proximis, crassis, in medio valide reflexis, latis, superne angu- 

 latis, prope suturam sub-angustatis ; apertura rotundata: colore 

 inter varices pallide fulvio. 



Remarkable for the shape of the varices, which are turned 

 backward, so as to give the appearance of rounded, tumid 

 veins ; the interstices, which appear narrow, are of a delicate 

 idi.vm. colour. From the West Indies. 



27. Sc. Lyra. (pi. xxxiii. f. 38, 39, pi. xxxiv. f. 81, 

 82.) Sow. Jun. 



T. ventricosa, acuminata ; anfractibus prominentibus 

 rapide crescentibus, prope suturam elevatis, sutura profunda 

 distinctis : varicibus tenuis, valde numerosis, obliquis ; aper- 

 tura magni, ovali; labio intemo tenui, obliquo; umbiHco 

 parvo : colore pallide fulvo, fasciis duabus fuscis, plus 

 minusve distinctis. 



A very beautiful species with ventricose whorls, distin- 

 guished by a deep suture, and numerous thin, close, regular 

 varices entering the suture obliquely. The colour is very pale 

 brown, or dull white, with two bands of deeper or paler brown ; 



