TETHYS—ORIENTAL. 103 
This species is remarkable for the large size of the oral tentacles. 
(Sm.) 
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 Smiru, Zool. Coll. H. M.S. Alert, p. 89 (1884), 
VI. Species of the East Indies, China and Japan. 
T. ceocrAPHIcA Adams & Reeve. PI. 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. & R.). 
Java Sea, among floating fuci (Ad.). 
Siphonotus geographicus A. & R., Zool. Samarang, p. 64, pl. 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. PI. 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 
