534 PROF. C. H. o'DONOGHUE : REPORT ON 
Genus Dolabrifera Gray, Proc. Zool. Soc. London, p. 162 (1847). 
Type by tautonomy and designation : 
D. dolabrifera Rang, Hist. Nat. Aplys. p. 51, pi. 4. figs. 1-6, ex Cuvier, 
lieg. Anim. (edit, i.) ii. p. 398, " 1817 " for 1816 (name only). 
Synonymy : Dolabeifee Kscher, Man. Ooiicliyl. 1883, p. 568. 
The general form is ovate-oblong or sack-like, tapering towards the tail. 
Tentacles and rhinophores are slit and expanded distally, the latter lie nearer 
to the front margin than to the dorsal slit. The eyes are as in Tethys. 
The pleuropodial lobes arise far behind the middle of the length, are 
contiguous, scarcely mobile, united behind, and enclose a large gill-cavity ; 
the dorsal slit is short. The mantle is small, not perforated over the shell, 
nor covering much of the gill. The foot is broad, often expanded at the 
edges. The genital pore lies in front of the gill, under the mantle-edge. 
The shell is small, not spiral, solid and calcareous, and sub-triangular, 
trapezoidal or irregularly oblong ; the apex is projecting and calloused, 
with no spiral tendency. The radula bears large sub-triangular rachidial 
teeth, with several denticles on the cusp, and the lateral teeth possess long, 
coarsely denticulate cusps. 
Species Dolabrifera pelsartensis, sp. nov. (PI. 27. fig. 3 ; PL 29. 
figs. 26-28.) 
Body. The body is oblong-ovate, reaching its maximum width behind the 
middle and passing backwards to a bluntly pointed tail. The back is arched 
and the whole integument is wrinkled, and bears a series of wart-like pointed 
projections. The pleuropodial lobes take their origin towards the middle 
region of the body ; they are not easily movable, and are separated by a slit 
lying slightly to the right of the mid-dorsal line and mainly in the posterior 
half of the animal's length. At the anterior end the lobes are practically 
contiguous, but separated by the narrow genital groove. Within the gill- 
cavity, the mantle entirely covers the shell and is not perforated ; it only 
covers a small part of the gill. 
Colour. The colour of the preserved specimens is of a uniform dirty 
brownish grey, and Professor Dakin informs me that the living animals were 
much the same colour, but of a deeper warmer brown. 
Dimensions. The larger specimen measured 32 mm. long by 9 mm. wide, 
and 8'5 mm. high. 
Head. The head is relatively small and the front of it is occupied by the 
vertical slit-like mouth. It is separated from the front end of the foot by a 
groove. Antero-laterally it bears two split auriculate oral tentacles. The 
tiny eyes lie just in front of and outside the rhinophores. In the larger of 
the two specimens tiie head is practically withdrawn into the body. 
Foot. The muscular foot is well developed and broad. At the anterior end 
it is bluntly rounded and, as noted, separated from the head by a transverse 
groove. Posteriorly it narrows off and terminates in a blunt point. 
