212 



and other colours, with 3 transverse, more or less distinct bands, 

 composed of transverse, parallel, fuscous lines, together with 2 other 

 dotted hues, marked in the intermediate edges with large black 

 spots ; spire rather short, conical, sometimes rather prominent, with 

 a small mis-shapen papillary apex of 3 volutions, the remaining 3 

 or 4 volutions furnished ^ntll large oblong tubercles ; the last both 

 anteriorly and posteriorly roughened with transverse striae ; colu- 

 mella with from 9 to 1 2 folds, of which the 5 or 6 anterior are the 

 larger. 



Tliis is another of the species that varies so excessively both in 

 form and colours, that it is not surprising that Lamarck, who had 

 but comparatively slight opportunities, should have distinguished 

 its varieties specifically ; we have carefully examined a great series 

 of them, from which we are satisfied that Lamarck^s f . Thiarella, 

 V. carneolata, V. gumaica, V. Imiigata, and probably his V. noda- 

 losa, are merely varieties of V. nrnsica. We have represented each 

 of the principal varieties. 



45. VoLUTA SULCATA (pi. liii. f. 17.), Lam. 



Testa oblongo-ovata, crassa, subrugosa, palHde fnlva, longitudi- 

 naliter costata, costis obtusis ; transversim sidcata ; spira brevius- 

 cula, obtusa, anfractibus tribus primis papillam efibrmantibus, ultimo 

 fasciis subfuscis duabus lineisque parallelis castaneis, seriebus tribus 

 macularura castanearum instructis; colmnella plicis 10 ad 11. 



Shell oblong-ovate, thick, rather rugose, pale fulvous, ^dth obtuse 

 longitudinal ribs, and transver;^ely grooved ; spire rather short, ob- 

 tuse, with a papillary apex formed of the 3 first volutions ; the last 

 volution with 2 subfuscous bands, wit] i several parallel chesnut lines; 

 and three rows of chesnut spots; colmnella with 10 or 11 folds. 



Tliis species closely resembles several of the varieties of musica ; 

 it shows moreover the same general system of coloration. We have 

 ventured to consider it distinct, on account of its transverse grooves 

 from one end of the last volution to the other. 



46. VoLUTA poLYZoNALis (pi. Hi. f. 77, 78.), Lam. 



Testa subconica,turbinata, subcrassa, transversim sulcata, cinereo- 

 virescente, castaneo-punctulata, tteniis transversis plurimis palles- 

 centibus sparsim fusco-guttatis ; spira brevi, conica, anfractibus 

 duobus primis papillam parvam efformantibus, cseteris 5 submuri- 

 cato-tuberculatis ; ultimo postice angulato, tuberculis acutis coro- 

 nato ; apertura oblonga, suboblic(ua, utra(|ue extremitate subangu- 

 lari ; labio externo incrassato, maculato, postice tenui ; columella 12- 

 ad 14- plicata, plicis variis, anticis plerumque majoribus. 



