FASCTOLARIA. 77 



appear in the Swift West Indian Collection, and I have, therefore, 

 some slight doubt of the correctness of the localities. 



F. TRAPEZIUM, Linn. PI. 61, figs. 24-26 ; pi. 62, figs. 27, 28. 



Thick, ponderous ; whorls slanting on the shoulder, armed 

 with a row of tubercles, which, in old specimens, become large 

 and thick. Flesh-color, beneath a yellowish brown epidermis, 

 encircled by brown, engraved lines, which are approximated in 

 pairs ; aperture flesh-color, with revolving brown, raised lines. 



Length, 4-8 inches. 



Philippines ; Java; China ; Red Sea ; Auckland Is. ? 



Among the forms of this species several have received specific 

 names ; among these I figure F. Lischkeana, Dunker (fig. 27), a 

 rather smooth form, the nodules not being developed ; F. Au- 

 douini, Jonas (figs. 24, 25), which is somewhat more slim than 

 the type, and differs somewhat in color. F. ponderosa, Jonas 

 (fig. 28), which, at first sight, appears sufficiently distinct, I am 

 able to connect with the typical form by intermediate stages ; 

 it is very ponderous, the tubercles projecting outwards like spines 

 from the angle of the shoulder. 



F. HEYNEMANNI, Dunker. PI. 62, fig. 29. 



Flesh-color, under a yellowish olive epidermis. 



Length, 3-5 inches. 



Natal, 80. Africa. 



Evidently described from a worn specimen : it is very doubt- 

 ful whether it has any good claim to recognition as a species. 



F. CORONATA, Lam. PL 63, figs. 34, 30. 



Light yellowish brown or flesh-color, under a thin, olive-brown 

 epidermis. Length, 4-7 inches. 



Philippines; Australia; Tasmania. 



The spire is longer, the tuberculations closer, and consequently 

 more numerous than in F. salmo,- Wood ; and perhaps the shell 

 is not quite so heavy : but these are differences of degree only, 

 and sometimes a F. salmo is met with which very reasonably 

 fulfils the above bill of particulars. There is a wide difference 

 of locality between the two forms, and I therefore allow them 

 both to remain for the present, but with considerable desire to 

 merge them under the name of F. coronata. 



