<5.A NAT., VOL. XIV. 
Ma V, 1933. By Berjiard C. Cotton and F. K. Godtrry. 
105 
are retractile into a common, smoothly margined cavity. Type — 
(7. C' '>'iiv^^Tinu Adams Sc Reeve. Adams adds: In Qcvutosoviu 
the tentacles are bulbous at theii' bases, the body is smooth, 
and tre foot is linear and grooved .... 1 he proboscidiform mouth 
is frcquentlv cxserted in these animals just before death 
The animals, which somewliat resemble Polycerae are inhabitants 
of tr-.-’pical seas, where they are found crawling on the corallines 
and madrepores.’’ Abraham adds, Ann. ^lag. Xat. Hist, 1876: 
“M-ajth subterminal, with a small deep pit at each side; pedal 
surdme long and linear, extending to end of tail, without free 
border, but with the edges contractile across the median groove; 
radula broad, with numerous rows of simple spines, none of which 
are central; a spinous buccal collar." Adams & Reeve described 
the dorsal tentacles as non-retractile, but corrected in Alder Sc 
Hancock’s Synopsis. They are certainly retractile in the four 
species represented in the British Museum collection. 
C. brevlcaudatum. Abraham 1876 (= C. oblouguvi Abra- 
ham 1892). PI. 3, figs. 3, 4, 5, and Pi. 4, fig. 14. Animal 
large, elongate, dorsally flat, rounded in front, sides nearly paral- 
lel except along a slight lateral enlargement in the centre, and 
tapering to an obtuse point behind; sides much elevated, especi- 
ally in the region of the vent; cloak obsolete, subquadrangular, 
with an undulate margin, and ending posteriorly in a peculiar 
mpple-like protuberance; shaded with tints of buff to light brown, 
deeper colour at border and fading inwards, leaving along the 
margin of the dorsal surfacc^^a series of alternate light and dark 
patches, there be'igg in the centre of the former in each case a 
round, violet-purple” spot surrounded by a uniform ring of reddish- 
purple: the central area of this surface is richly sprinkled with 
circular spots of varying size, of a light violet-purple colour, with 
a darker border, and sometimes surrounded b)' a rim of light 
lemon: the post-branchial flesh protuberance ^‘is decorated by a 
series of brown circles, placed contiguously so as to produce a 
regular network with meshes of different dimensions; the sides 
are somewhat similarly marked to the cloak, being lightly tinted 
and richly sprinkled with three irregular, longitudinal rows of 
spots, the two outer rows of rich purple, the inner of a lighter 
violet-purple; the median row does not extend to beyond the 
length of the cloak, and thus leaves the dorsal portion of the 
tail marked with deep purple spots only; foot linear, tapering 
posteriorly to a blunt point, white dorsal tentacles clav^te, 
obliquely laminated, the number of laminae varying from sixteen 
tc thirty or more, rich orange; sheaths slightly elevated; oral ten- 
tacles stout, subconical, tapering; genital aperture prominent, 
branchial plumes twelve; intergrown at the base, incompletely 
