OF CONCHOLOGY. 143 



surface shelving towards the angle ; and the whorls below the 

 angle ventricose and thence gradually contracted and terminat- 

 ing in a moderately elongated canal, generally little or no longer 

 than the aperture, concurrent with and proximal to the siphonal 

 fascicle, and correspondingly tortuous. Siphonal fasciole coin- 

 cident with the columellar plait : spire variable in evolution, 

 with a papillary nucleus ; sutures plane ; aperture rhombo- 

 ovate ; outer lip in youth striated within ; columella covered 

 with a thin callous coat, decidedly and regularly concave, and 

 with a wide oblique marginal fold. 



The genus Fulgur is thus restricted to species destitute of a 

 sutural canal and ciliated periostraca. It was originally estab- 

 lished by Montfort for F. eliceans \j=F. carica and F. pe7'versu8^, 

 and was distinguished by the armed spire and fold of the colu- 

 mella. It embraces only the typical species of the genus Busy- 

 con of recent authors. From it must be eliminated in the first 

 place the subgenus TapJion Ad. f.,* established for the P. striata, 

 Gray, and which evidently has no affinity to Fulgur. The 

 '■'■ crassicauda, Phil.," is at least very closely allied to the " ^g- 

 mifusus tuba, Gmel.," of the same authors. f Of the other spe- 

 cies B. canaliculatum is transferred to the genus Sycotypus. 

 B. Kieneri, Phil., probably represents a monstrosity of F. p>er- 

 versus, and has lately received a new name (^B. gibhosum) from 

 Mr. Conrad. t 



The three recent species herein admitted appear to be well 

 entitled to such rank; the F. coarctatus is, however, little known, 

 and the identification and characters are accepted solely on the 

 data furnished by Petit, as I am not able to consult Sowerby's 

 description at present. The habitat is said, with doubt, to be 

 Florida ; it certainly requires confirmation ; and the species it- 

 self, although apparently very distinct, may be accepted for the 

 present with reservation. § The F. carica and F. perversus 

 inhabit different geographical areas, which, however, overlap. 

 While F. carica is abundant on the eastern coast south of Cape 

 Cod, the F. perversus is unknown so far north, but occurs along 



♦ Op. cit. i., p. 151. 



t Op. cit. i., p. 83. The identificatioM of the species in question has 

 been made by JVl, Petit de la 8aussaye. 



X A dextral specimen of Fulgur in the writer's collection exhibits the 

 same gibbous revolving ridge, and appears to be referable to F. carica. 



I It may be recalled that the young of F. carica exhibits a similar rela- 

 tively-elongated canal, and possibly the F. coarctatus may represent a 

 form of that species in which the characteristics of the young have been 

 abnormally persistent; the latter, however, is much more ventricose than 

 such young. 



