TETHYS-ORIENTAL. 103 



This species is remarkable for the large size of the oral tentacles. 

 (5m.) 



T. SPARSINOTATA Smith. 



Animal about 45 mill, in length, of a pale color in spirit, varied 

 with a few dark distant dots along the sides, caudate posteriorly. 

 Middle of back between the mantle lobes in front of the shell, also 

 the inner surface of the anterior portion of the lobes themselves, ex- 

 hibiting irregular brownish patches. Lobes commencing a short 

 distance behind the dorsal tentacles, and terminating behind at 

 about the same distance from the end of the body. Oral tentacles 

 moderately large and long ; posterior conical, acuminate, not far 

 apart. 



Shell elongate, rather beaked behind, sharply arcuate in front, 15 

 millim. long, 10 broad. (Smith.) 



Thursday Island, Torres Straits, 4-5 fms. (Coppinger). 

 Aplysia sparsinotata SMITH, Zool. Coll. H. M. S. Alert, p. 89 (1884). 



VI. Species of the East Indies, China and Japan. 



T. GEOGRAPHICA Adams & Reeve. PL 25, fig. 1. 



Whitish-brown, covered with minute dark specks, and large, ir- 

 regular, green reticulated patches, margined with opaque white; 

 under surface of foot of a bright yellow ; left side of foot with a 

 projecting lobe [swimming lobe] which overlaps that of the oppo- 

 site side ; siphon of the mantle prolonged into a tapering, subcylin- 

 drical tube. Shell nearly membranaceous. (A. & jR.). 



Java Sea, among floating fuci (Ad.~). 



Siphonotus geographicus A. &R., Zool. Samarang, p. 64, pi. 18, f. 



1 (1848). 



This species is type of the genus Siphonotus Adams & Reeve, 

 founded for Aplysias with the mantle produced to form a posterior 

 excurrent siphon. The variations from a short to a long tube in 

 various species render it impossible to give this character more than 

 specific value. 



T. CORNIGERA Sowerby. PL 20, fig. 45. 



Shell talon-shaped, narrow, ovate, arched, concentrically striped ; 

 apex much elevated, incurved, acuminated, callous ; upper margin 

 depressed, excavated, obtusely angular at the end ; outer lip sinu- 

 ously obliquely produced below, lower margin a little acuminated 



