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. I'hilippi describes the animal thus : Body on the upper 

 part painted with irregular spots of dark purple, which are 

 separated b}* 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. PI. 9, fig. ()0. 



Pale 3'ellowish to brown, sometimes spotted with brown on the 

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

 olive-lirown or ^-ellowish. Length, 1'2.5 to 1*75 inches. 



Giipe of Good Hope; Neic SoutJi Wales, Australia. 



Ranella tuberculata, Risso, is a sj'nonym of T. cutaceua, but 

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

 of Purpura is a T. doliarius, t^'pical in every respect. 

 T. Africanus, a. Ad. PI. 10, fig. 73. 



Ued-brown, white within the aperture. Length, 2*25 inches. 



JrJidhoe, 8. Africa. 



I separate this from T. doUariua witii considerable hesitation. 

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

 species 1 have before me an example of T. doUarivx which is 

 rather longer than usual, with the peculiar revolving sculpture 

 almost obsolete. 

 T. FossATUS, Gould. 



Shell solid, subglobose, yellowish ; s))iie short; Avhorls six, the 

 sutures profouudly canaliculate ; surface with two revolving ribs, 

 crossed by nodulous longitudinal undulations ; aperture narrow, 

 rounded behind; lip varicose, denticulate, sulcate within; 

 columella erectly sulcate, the posterior sulci larger. 



Lengtli :^>r), diam. 20 uiill. ]I<>nkon<f, Vhina. 



Not figure<l ; said to approach T. <h)li(iri(i>^ in form and sculp- 

 ture, but has the sutural canal and a longer Ix^ak. 



T. Spknoleri, Lam. PI. 9, tig. 61. 



Yellowish brown, the incised revolving lines chestuut-lirown ; 

 all the ribs crossed b}^ longitudinal strise, cutting their surface 

 into bead-like nodules ; white within the aperture. 



Length, 3'.o to 5 inches. ,S'. Australia; Chatham hlaads. 



The epidei'mis is thin, smooth, yellowish olive. 



