94 TETHYS-POLYNESIAN. 



much more developed " hood." The mantle foramen is extremely 

 large, judging from the rather poor alcoholic specimens before me. 

 I see no pore of the opaline gland, and it is probably multiple, as 

 in T. punctata. My specimens are yellowish-gray, duskier in front, 

 with some blackish on the head. 



T. VIRIDESCENS Pease. PL 25, fig. 3. 



Length 30 cm. Animal elongate, smooth ; dorsal region, moder- 

 ately elevated, slightly convex in its outline, terminating abruptly 

 posteriorly, beyond which the foot extends but a short distance, 

 ending in a rounded point. Head depressed, neck long; labial 

 tentacles large, broad, much dilated ; cervical tentacles moderate in 

 length, stout, cylindrical, grooved their whole length on the outer 

 sides. Eyes immersed, a short distance in advance of the base of 

 the cervical tentacles. Siphon large, recumbent, long, corrugate 

 transversely near its termination. Ground color pale green mottled 

 with white, and dusky, whole surface reticulate with fine black lines, 

 arid ornamented with remote, large, diffused dusky rings. Foot 

 greenish flesh color, slightly mottled with dusky, upper sides of the 

 posterior portion black. (Pse.*). 



Shell undescribed. 



Kings-mill Is. (Pse.). 



Syphonota viridescens PSE., Amer. Journ. of Conch, iv, p. 77, pi. 

 10, f. 1 (1868). 



A large species " length one foot," which will probably retain in 

 alcohol the dusky rings described by Pease. 



T. SOREX Rang. PI. 22, figs. 1, 2, 3, 4, 5. 



Length 2'5 cm. Body short, oblong and much swollen ; mantle 

 thick and a little rough ; foot large and callous ; lobes narrow. 

 Opercle with a median tube. 



Color deep green, marbled with black spots. (Rang). Dirty 

 green, marbled or spotted with black, foot olivaceous. (Less.). 



Shell very thin and not very concave, oval-oblong, yellow outside, 

 white within ; the sinus rather shallow, and situated far back. 

 Length 25 mill. 



Island of Oualan ( Ualari), Caroline group (Lesson). 



Aplysia sorex RANG, Hist. Nat. Aplys., p. 57, pi. 10, f. 4-8. LES- 

 SON, Voy. autour du Monde, La Coquille, Zool., ii, pt. 1, p. 294. 



