134 SIPHONALIA. 



by comparative characters or figures. The variation of coloration 

 and sculpture is known to be great in this genus, consequently it 

 is verj' probable that a portion of these species will prove to be 

 SNnon^^mous with others previously described. I shall merely 

 enumerate these as unidentified species. 



The animal and dentition of Siphonalia are unknown. 



S. Kellettii, Forbes. PI. 54, fig. .352. 



Thick, ponderous, white. Length, 4-6 inclies. 



Lower California ; California ; Jajnm. 



Kobelt justly re nuvrks that this species occupies an interme- 

 diate position between Siphonalia and Neptunea, so that it is 

 ditticult to decide in which genus it ought to be placed. 



S. FUSCOTINCTA, Cpr. 



A. unique, unfigured shell from Sta. Barbara, Cal. It is probably 

 very immature, being only -IT inch long. It is said to look like 

 a minute edition of S. Kellettii, but does not accord with the 

 young of that species. Science is not benefited by the descrip- 

 tion of such material as this. 



S. FuscozoNATA, Angas. PI. 55, fig. 3(U. 



White, with an interrupted, broad brown band on the periphery ; 

 lip acutely lirate within, columella with a superior callus. 



Length, '54 inch. 



S. Australia. 



Said to resemble Periaternia^ but without the columellar 

 plications of that genus. It is too small to be an adult shell, if 

 a Siphonalia. 



S. MODiFicATA, Rcevc. PI. 55, fig. 3()2. 



Light yellowish lu'own. Ijcngth, 44 mill. 



La Pas, L. California, Carpenter; Japan, A. Adams. 



Resembles somewhat Melongena pallida^ B. and 8., and may 

 not be properly classed as a Siphonaliai 



S. SPADICEA, lleeve. PI. 55, fig. 363. 



Light brown, with here and there longitudinal reddish flames 



and reddish brown spiral ridges. Length, 42 mill. 



Japan. 

 I do not know this species ; it resembles some of the Melon- 

 genic quite as much as this group — where it is placed by Kobelt. 



