1 6 SIMPULUM. 



The epidermis differs from that of most of the Tritons in being 

 a thin, smooth skin. The species is found from low to deep 

 water. Philippi describes the animal thus : Body on the upper 

 part painted with irregular spots of dark purple, which are 

 separated by narrow white lines ; foot pale violet above, marbled 

 on the sides, and speckled here and there with reddish spots 

 which are edged with white. 

 T. DOLIARIUS, Linn. PL 9, fig. 60. 



Pale yellowish to brown, sometimes spotted with brown on the 

 ribs; white within the aperture. Epidermis short-tufted, light 

 olive-brown or yellowish. Length, 1'25 to 1*75 inches. 



Cape of Good Hope; Nrir tfotith Walr*, Australia. 



Ranella tuberculdta, Risso, is a synonym of T. cutaceus, but 

 the shell figured for Risso's species by Kiister in his monograph 

 of Purpura is a T. dollar ius, typical in every respect. 

 T. AFRICANUS, A. Ad. PI. 10, tig. 73. 



Red-brown, white within the aperture. Length, 2'25 inches. 



Ichaboe, /S. Africa. 



I separate this from T. doliarius with considerable hesitation. 

 It may prove to be merely a lengthened, more solid form of that 

 species I have before me an example of T. doliariti* which is 

 rather longer than usual, with the peculiar revolving sculpture 

 almost obsolete. 

 T. FOSSATUS, Gould. 



Shell solid, subglobose, yellowish; spire short; whorls six, the 

 sutures profoundly canaliculate ; surface with two revolving ribs, 

 crossed l>y nodulous longitudinal undulations ; aperture narrow, 

 rounded behind; lip varicose, denticulate, sulcate within; 

 columella erectly sulcate, the posterior sulci larger. 



Length 35, diam. 20 mill. Honko-ug, China, 



Not figured ; said to approach T. doliarius in form and sculp- 

 ture, but has the sutural canal and a longer beak. 



T. SPENGLERT, Lam. PI. 9, fig. 61. 



Yellowish brown, the incised revolving lines chestnut-brown ; 

 all the ribs crossed by longitudinal striae, cutting their surface 

 into bead-like nodules ; white within the aperture. 



Length, 3'5 to 5 inches. & Australia; Chatham Maud*. 



The epidermis is thin, smooth, yellowish olive. 



