APPENDIX. 301 



H. SEPULCHRALIS Fer. typical. 



The type of Ferussac is a shell with rather elevated spire, having 

 a distinct furrow on both upper and lower surfaces ; a light zone 

 upon the gibbous, subangular ridge around the umbilicus. Alt. 25, 

 diam. 45 mill. (From Ferussac's illustration, Hist. t. 75, f. ]). 



Var. SGANZINIANA C. & F. (pi. 64, figs. 58, 59.) 



Spire nearly plane ; last whorl concave above, flattened beneath, 

 etc. To this variety are to be referred many depressed specimens 

 of a uniform dark hue, which are not angled around the umbilicus 

 but have the base convexly flattened. Umbilicus encircled by a 

 light or dark band or by none. Color-varieties very numerous. 

 There are no white or creamy streaks or bands. 



Var. EURYCHILA C. & F. (pi. 64, figs. 56, 57). 



A distinct furrow above and below, as in the type ; shell large 

 (diam. 57-64 mill) ; spire low ; umbilicus bounded by a gibbous 

 ridge and usually a light band ; surface streaked or banded with 

 hydrophanous whitish markings. H. cadaverosus Pilsbry (pi. 62, figs. 

 29-31) is a depressed form of this variety, connecting it with Mar- 

 tens' funebris, which is intermediate between cadaverosus and sgan- 

 ziniana. 



Connected with the typical sepulchralis by numerous shells smaller 

 than eurychila but having the same " papery" epidermis. I have 

 acquired a large series of these shells since my description of eadav- 

 erosus was printed. The oblique light streaks are sometimes cut 

 into spiral bands (like Martens' funebris*) by dark spirals. A pale 

 color-form (pcUlidior, pi. 64, fig. 56) is diagnosed by Crosse & Fischer. 



Var. FUNEBRIS Morelet, (not Martens). PL 67, figs. 67, 68, 69. 



No furrow or depression on the convex upper surface, or only a 

 very slight one; base having a circular impression ; purplish-black 

 or rufous, unicolored ; aperture dark within, lip whitish, the basal mar- 

 gin having a low, slight tooth-like prominence in the middle. Alt. 

 24-26, diam. 45-53 mill. (See Morelet, Journ. de Conchyl. 1877, p. 

 217, also Crosse & Fischer, in Hist. Madag., Moll. t. 11, f. 3). The 

 series before me shows this to be a mere variety of sepulchralis. It 

 often shows whitish streaks, like H. eurychila. 



I have. not seen H. excoriata Martens. It is probably a form of 

 eurychila. 



