TETHYS-ORIENTAL. 105 



The whole shell is laterally much curved. 

 T. MARMOREA A. Adams. 



A large species, sometimes 10 inches long. Back elevated ; 

 swimming lobes large, ample, marbled with green and white; an- 

 terior tentacles very broad, truncate ; posterior tentacles sublinear, 

 obtuse. Shell large, thin, fragile, much dilated in front; apex 

 scarcely involute, somewhat thickened. (A. Ad.). 



Port Hamilton (Mah-lu Sau), tidal pools and taken in the seine 







Aplysia marmorea A. AD., Annals and Magazine of Natural 

 History, Series 3, viii, p. 140 (August, 1861). 



T. MARGINATA A. Adams. 



Back elevated ; swimming lobes large, dilated, white edged, and 

 then with a brown margination ; reddish-brown, variegated and 

 dotted with brown. Anterior tentacles broad, short, truncate ; pos- 

 terior small and subacute. Shell fragile, thin, semimembranous, 

 subtriangular, dilated and rounded anteriorly ; apex scarcely invo- 

 lute. (.1. Ad.'). 



Po ft Hamilton in rock pools at low water (Ad.). 



Aplysia marginata A. AD., Ann. Mag. N. H. (3), viii, p. 141, 



(Aug., 1861). 



T. FIMBRTATA Adams & Reeve. PL 18, figs. 20, 21, 24. 



Anterior tentacles with a sinuous, fringed margin from the outer 

 end to the head ; posterior tentacles bent toward the apices, deeply 

 slit. Obscure greenish, with very many eye-spots, with minute 

 white pupils and brown irides ; ornamented with black anastomos- 

 ing lines and minute opaque white dots. (A. & E.). 



Shell oblong-subquadrate, pale, concentrically striped in every 

 part, thin, subventricose, very thinly testaceous within, apex a lit- 

 tle elevated, incurved, scarcely callous, upper margin slightly exca- 

 vated, lineate at the end ; outer lip rather straight, subquadrate at 

 the end, dorsal margin convex, lower margin rounded. (Sowb.). 



Miyako-jima Island (Taipinsan or Typinsan of some charts), 

 Further Loo Choo group. 



Aplysia fimbriata A. & R., Zool. Samarang, Moll., p. 63, pi. 17, 

 fig. 2 (1848). SOWERBY, Conch. Icon., pi. 4, f. 12a b. 



Inner surface of foot, when seen expanded, marbled with black 

 and white. This large and handsome species is remarkable for the 



