of Edinburgh, Session 1880-81. 239 
Dorsal lamina short, 4 mm. wide, and rather thick. No ribs nor 
teeth. 
Tentacles branched ; eight large and eight small placed alternately, 
and about sixteen very minute ones placed between the others ; the 
largest are of considerable size, and are strong. 
Olfactory tubercle large, prominent. Both horns much coiled. 
One specimen from Station 150 (south of Kerguelen Island) ; 
150 fathoms. 
Ascopera pedunculata, n. sp. 
External appearance. — Club-shaped, consisting of a rudely 
diamond-shaped body on a thick stalk, somewhat compressed 
laterally. Anterior end straight, wide, truncated ; dorsal and 
ventral edges nearly straight, sloping outwards and backwards to 
the wide posterior end ; posterior end prolonged into the long stalk 
which springs from its ventral edge, and is twice as long as the 
body. The stalk is thin, being compressed laterally. It is narrow 
where it joins the body, and increases gradually in width as it 
proceeds backwards, till, at the posterior end, where it is attached, 
it is more than twice its original width. Apertures at the extremities 
of the anterior end, distant, conspicuous, slightly projecting, dis- 
tinctly lobed ; branchial at ventral edge, directed ventrally ; dorsal 
at dorsal edge, directed dorsally. Surface even, slightly roughened 
all over. Stalk smooth. Colour pale grey. Length of body, 
7*5 cm. ; breadth of body, 7 cm. ; length of stalk, 17 cm. ; breadth 
of stalk, 4*6 cm. 
Test moderately thick and tough on body ; very thin and mem- 
branous on stalk. 
Mantle thin and membranous, or semi-gelatinous. The posterior 
part is prolonged for 13 cm. into the peduncle. 
Branchial sac with seven folds on each side. Internal longitudinal 
bars delicate, not distant. Transverse vessels rather irregular • 
generally several more or less perfect smaller vessels between the 
larger ones. Meshes greatly elongated transversely. Stigmata of 
different lengths, but all running longitudinally. 
Dorsal lamina broad but thin and short. 
Tentacles large, branched, sixteen in number; placed long and 
short alternately. 
2 H 
VOL. XI. 
