94 



49. Peruvianus, Sicain. 



50. plicatus, Lam. 



51. ponderosus, Phil. 



52. pugilis, Linn. 



53. rugosus, Sow. 



55. Sibbaldii, Sow. 



56. succinctus, Limi. 



57. terebellatus, Sow. 



58. Tliersites, Gray. 



59. tricornis, Lam. 



54. Scalariformis, Dmc^. 60. tridentatiis, id. 



61. troglodytes, tV/. 



62. turritus, id. 



63. urceus, Linn. 



64. Vanikorensis, Qwoy. 



65. variabilis, Swain. 



66. vittatus, ijww. 



Figure. 



Steombus Nov^ Zelandi^e. PL 8. Fig. 37. Shell, showing its ex- 

 panded wing-hke lip, WTinkled aperture, and sinus. 



Family 5. CANALIFERA. 



Sliell ; canaliculafed, canal sometimes very long, sometimes very 

 short ; lip not changing with age. 



The family Canalifera comprises an extensive range of mollusks whose 

 shells exhibit great diversity of structure, but are all more or less chan- 

 nelled at the base ; this channel is, however, extremely variable ; in some 

 Mn rices, for example, it almost rivals that of the Rostellaria fusus in length 

 and tenuity, whilst in most of the Ranellce and CmiceUaria it is com- 

 paratively obsolete. There are other characters of no less importance dis- 

 tinctive of groups; the genera Fasciolaria, Cancellaria and TurUnella 

 are characterized by a row of oblique plaits on the columella somewhat 

 after the manner of the Volutes and Mitres; and the Tritons, Miirices 

 and Ranella, are distinguished by a system of varicose growth, developed 

 with a regularity which is not to be found in any other genus. 



The animals of the different genera referred to this family, so far as they 

 are at present known, are, with certain modifications, the same tliroughout ; 

 characterized by a short stout disk, truncated head, and fine pointed tenta- 

 cles, such as are represented in the Triton tvherosus (Plate (r.), the chief 

 variation consists in the developement of the mantle, which in some genera, 

 and even species, is simple, whilst in others, it is furnished with that variety 

 of filamentary processes which secrete the fronds, spines and tubercles. 



It has been remarked by M. Deshayes, that the Cerithia and Cancellarice 

 should not be included in the present family, because they do not strictly 

 come within the category of the flesh-eating tribe ; the former have been 

 described to be of phytiphagous habit, and of the latter M. Deshayes ob- 

 serves, that a species inhabiting the shores of the Mediterranean is inva- 

 riably attached to plants ; has it been demonstrated, however, that they are 

 not carnivorous? This is a question that remains open to future observers. 



