OF CONCHOLOGY. 77 



Dolabrifera Tahitensis, Pease. — Plate 8, fig. 5. 



Description. — Animal rather slender, elongate, pyriform, deep- 

 est and widest posteriorly, rounded behind, margins thin ; back 

 arched and furnished with scattered, minute, subretractile, simple 

 and branched filaments ; head rounded above, convex in front ; 

 eyes immersed, a little in advance of the dorsal tentacles, the 

 pupil bluish-black and iris bluish-slate ; dorsal tentacles strongly 

 dilated outwards, ear-shaped, obliquely truncate and grooved ; 

 anterior pair of about the same size, rather more, dilated. Va- 

 riegated with different shades of white, green, olive brown, and 

 sometimes blotched with rusty brown ; foot pale greenish-gray, 

 closely and finely dotted with opake white and olive. 



Hah.— Tahiti. 



Remarks. — Common under stones in littoral zone. Active in 

 its motions, gliding along by the middle and lateral portions of 

 the foot alternately. 



This species approaches D. olivacea, Pse. Sandwich Islands. 



Syphonota viridescens, Pease. — Plate 10, fig. 1. 



Description. — Testa ? 



Animal elongate, smooth ; dorsal region moderately 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, and ornamented with remote, large, diffused 

 dusky rings. Foot greenish flesh color, slightly mottled with 

 dusky, upper sides of the posterior portion black. 



Dimensions. — Length one foot, 



Hab. — Kingsmill Islands. 



Syphonota punctata, Pease. — Plate 9, fig. 2. 



Description. — Animal oblong, slender, smooth, dorsal region 

 much elevated, convex in outline, gradually sloping posteriorly 

 to the termination of the foot, anteriorly abrupt ; neck long ; 

 cervical tentacles slender, long and cylindrical; labial tentacles 

 large, moderately dilated. Siphon large, erect. Color pale 

 fawn, mottled with darker, and covered with minute crowded 



