222 GIBBULA. 



Compared by Philippi with G. racketti Payr., which is similarly 

 colored, narrower, more ovoid, less conical. 



G. SEMINULA Philippi. PI. 33, fig. 85. 



The shell is rather thin, globose-conical ; the 5 whorls are 

 moderately convex, the last quite circular, somewhat angular in the 

 middle, but the angle appears much more prominent on account of 

 a thread-like ridge which encircles it. Above this are 4-5 elevated 

 lirse, as wide as their interstices ; and upon the base are 9 or 10 lira?, 

 which become narrower and weaker toward the periphery. The 

 umbilicus is very narrow, a mere crevice. The aperture is rhom- 

 boidal, with rounded angles ; the columella slightly arcuate, simple. 

 The color is red, verging on yellow, with 4 to 5 broad white rays ; 

 the apex is white. Alt. 3-1, diam. slightly less. (Philippi.') 



Habitat unknown. 



T. sem'nuilnm PHIL., Conchyl. Cab., p. 308, t. 44, f. 12. 



The most similar species is our T. helicoides [G. adansonsii Payr.], 

 but that species differs in the larger size, wider umbilicus and 

 rounder aperture ; at least no transition forms have come under my 

 notice. (Philippi.) 



G. TIBERIANA Crosse. PL 32, fig. 53. 



Shell imperforate, conical, rather thin, olivaceous with nacreous 

 reflections, ornamented with flexuous longitudinal grayish streaks; 

 spire .moderately elevated ; suture impressed ; whorls 5-1 to 6, sub- 

 planate, the last obtusely angulated ; base obsoletely striated and 

 covered with spots of grayish-white; aperture oblique, quadrate, in- 

 side white, nacreous ; columella somewhat expanded ; outer margin 

 simple, acute. (Crosse). Alt. 4-}, diam. 4-1 mill. 



Coodgee Bay, S. Australia. 



T. tiberianus CROSSE, Joum. de Conch., 1863, p. 381, t. 13, f. 2 

 FISCHER, Coq. Viv., p. 408, t. 120, f. 2. Cantharidus tiberianus 

 ANGAS, P. Z. S. 1867, p. 215. 



G. YESSOENSIS Schrenck. PI. 37, figs. 23, 24 ; pi. 40, fig. 43. 



Shell small, imperforate, conical, rather thin, smooth, shining, light 

 olivaceous, longitudinally marked above with radiating red stripes, 

 with short alternating white maculations at the suture and periphery ; 

 upper surface of whorls with three spiral girdles of alternating white 

 and blackish spots, continuous over the longitudinal flames; spire 

 conical, whorls 6, slightly convex, obsoletely lirate, especially at 



