TETHYS-ANTILLEAN. 79 



always are retained. The shell of A. protea is one of the most beau- 

 tiful of the genus. Outside it is a beautiful straw-color, covered 

 within by quite a thick calcareous layer, sometimes very nacreous. 

 This animal is known to the negro fisherman by the name baril de 

 vin, on account of the beautiful fluid it secretes. 



The following seems to be a synonym : 



A. schrammii Deshayes. Uniform yellowish-white, prettily orna- 

 mented over the whole surface of the body with small circles of 

 black, unequal and very irregularly scattered (Desk., Journ. de Con- 

 chyl. [2], ii, [1857], p. 140). Described from an alcoholic spec- 

 imen ; no information additional to the above has been published. 

 It may prove to be a T. protea which has lost all coloration except 

 the black circles by the action of alcohol. 



Gaudeloupe (Schramm). 



T. LIVIDA d'Orbigny. PI. 20, figs. 37, 38, 39. 



Length 13-16 cm. Elongated, quite elevated, flabby, wide in the 

 middle, acuminate behind ; neck long. Buccal appendages sepa- 

 rated by a deep groove in front, very long, narrow, smooth. Tenta- 

 cles short, subconic. Eyes black, in front of tentacles. Mouth 

 with thin lips ; foot narrow, plicate in front, lengthened behind. 

 Swimming lobes wide and rounded, united behind. Mantle without 

 perforation above, but having a depressed line. Siphon long, 

 tongue-like ; gill longer than mantle. 



General color yellowish, mixed with green ; upper parts spotted 

 with light yellow. Inner borders of swimming lobes with a series of 

 equidistant, squarish, yellow spots. Its fluid is pale rose colored ; 

 odor musky. 



Shell depressed, very thin, oblong, the posterior sinus shallow ; 

 apex somewhat encrusted. 



Bay of Rio Janeiro, Brazil (Orbigny, in October). 



Aplysia livida OEBIGNY, Voy. dans PAmer. Merid., p. 206, refer- 

 ring to pi. 18, f. 3-5. Aplysia lurida ORB., t. c. on pi. 18, f. 3-5. 



Compare T. willcoxi, which seems to be nearly allied. I consider 

 Sowerby's A.guadaloupensis, known only by a description and figure 

 of the shell, as in all probability a synonym. The original descrip- 

 tion and figure are here reproduced : 



A. guadaloupensis Sowerby. (PI. 35, fig. 36). Shell talon-shaped, 

 subcompressed, pale yellowish ; radiately distantly lightly pitted, 

 concentrically elegantly striped ; within testaceous, pale pink. Apex 



