DOLABRIFERA. - 121 
straight below; left margin gently convex. Outside gently concave 
along the middle, sculptured with growth-stris, white with some 
concentric bluish bands. Interior white, but slightly convex, 
scarcely calloused. Length 7, breadth 3:2 mill. 
Port Jackson, New South Wales, Australia (Dr. J. C. Cox). 
D. braziert is described as “straight”, “apex straight,’ words 
that in no way apply to the present form. Still, the two examples 
of this species which I possess are much smaller than D. brazieri, 
which has a shell nearly 19 mill. long. Further comparisons are 
necessary to determine fully the relationship existing between the 
two forms. A notable feature of D. jacksoniensis is the anterior 
position of the genital opening. 
D. virrma Sowerby. PI. 34, figs. 23, 24. 
Soft parts unknown. Shell small, thin, glassy, pellucid, narrow ; 
rostrum short, rather wide, apex incurved, thick; basal margin 
slightly arched, outer margin a little rounded. (Sowerby). 
“ Narai,” Fyi Islands. 
D. vitrea Sows., Conch. Icon.; xvi, pl. 1, f. 1 (1868). 
The smallest of the known species; it is thin and glassy. 
D. rantrensis Pease. PI. 34, figs. 6, 7, 8. 
Animal rather slender, elongate, pyriform, deepest and widest 
posteriorly, rounded behind, margins thin; back arched and fur- 
nished with scattered, minute, subretractile, simple and branched fil- 
aments ; 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. Variegated with different shades of 
white, green, olive-brown and sometimes blotched with rusty-brown ; 
foot pale greenish-gray, closely and finely dotted with opaque white 
and olive. (Pse.). 
Tahiti. 
Dolabrifera tahitensis Psr., P. Z.S., 1861, p. 245; Amer. Journ. 
Monch, iv, p. 77, pl. $f. 5. 
Common under stones in littoral zone. Active in its motions, 
gliding along by the middle and lateral portions of the foot alter- 
nately. The species approaches D. olivacea Pse., Sandwich Islands. 
(E2e:). 
