DOLABRIFERA. 119 
D. cuviert was originally proposed as a substitute for D. dolabri- 
fera Cuy., evidently in order to avoid the duplication of names con- 
sequent upon the recognition of Dolabrifera asa genus. The type 
of D. dolabrifera, however, has a long shell (see pl. 34, figs. 12, 13), 
and the square one figured by Adams apparently is specifically dis- 
tinct. Possibly the shell figured by Rang as a monster of D. dola- 
brifera isthe same as H. & A. Adams’ species. 
D. M&ILLARDI Deshayes. PI. 34, figs. 26, 27. 
Soft parts unknown. Shell small, caleareo-corneous, elongated, 
trigonal, a little arcuate longitudinally, terminating in a small cal- 
lous posteriorly ; left margin straight, right margin rounded, the 
sinus long and straight. Upper surface regularly concentrically 
striated, lower surface with a thin shining callus; color yellowish- 
white, corneous, semitransparent. Length 7, width 3 mill. 
Island of Bourbon (Réunion). 
D. maillardi Desu., Catal. Moll. Réunion, p. 53, pl. 7, f. 20-22 . 
(1863). 
D. TRIANGULARIS Watson. PI. 65, figs. 7, 8. 
Soft parts unknown. Shell much arched, corrugated, porcella- 
nous, dull, and scored on the upper surface with sharp strong lines 
of growth, on the under surface lustrous and amorphous, with a 
strong but irregular oblique longitudinal furrow and rough radiat- 
ing lines toward the back; it resembles the blade of a fleam, being 
triangular, with a straight back, the handle (where the nucleus is) 
in front, and the point (a bluntly rounded one) on the left. Round 
the nucleus there is an amorphous expansion and _ thickening ; 
across the blade obscure and unequal rays diverge from a point be- 
hind the nucleus. The back of the blade is thick and blunt, the 
other two sides are bluntly beveled to a sharp edge. Length 0°43, 
width 0:21; height of arch 0:1, greatest breadth behind 0:3 inch. 
( Watson). 
Simons Bay, Cape of Good Hope, 15-20 fms. (Challenger). 
D. triangularis Wars., Journ. Linn. Soc. Lond., xvii, p. 346; 
Challenger Gastrop, p. 673, pl. 50, f. 7. 
This species is much more attenuated in front than Dolabrifera 
marmorea Pease from the Sandwich Islands, which otherwise it 
much resembles in form and texture, whilst it is in sculpture much 
more delicate. Dolabrifera maillardi Deshayes from the Island of 
