134 SIPHONALTA. 



by comparative characters or figures. The variation of coloration 

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

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

 synonymous 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 inches. 



Lower California; California ; Japan. 



Kobelt justly remarks that this species occupies an interme- 

 diate position between Siphonalia and Neptunea, so that it is 

 difficult 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. PL 55, fig. 361. 



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 Peristernia, but without the columellar 

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

 a Siphonalia. 



S. MODIFICATA, Reeve. PL 55, fig. 362. 



Light yellowish brown. Length, 44 mill. 



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



Resembles somewhat Melongena pallida, B. and S., and may 

 not be properly classed as a Siphonalia; 



S. SPADICEA, Reeve. PL 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- 

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



