igog.] 
N. Annandale : The Indian Cirripedia Pednnculata. 
83 
Var. IV {Cineras olfersii^ Leach). — Summit of capitulum bluntly pointed ; stripes 
present, but sometimes of a faint colour. Terga straight. Scutum tri- or 
quinquelobate, the three main lobes of equal or nearly equal length, meeting 
one another in such a way as to form two right angles, or one angle slightly 
greater than and one slightly less than a right angle. 
Habitat. — Mediterranean, Atlantic. 
The characters by which the form called Cineras olfersii by Leach is distin- 
guished from the same author’s var. chelonophilus appear from Hoek’s description 
of the latter to be so variable (and certainly are so variable in the variety hunter i) 
that it seems to be impossible to separate the two even as varieties. 
I have already (p. 68, antea) discussed the distribution ‘ of the varieties of C. 
virgatum, but it may be as well to state in greater detail what is known as to the objects 
to which they commonly affix themselves. The typical form is common on ships’ 
bottoms, on the skin of whales, and even of slow-moving fish (Darwin), on the copepod 
parasites of whales and fish (Turner) ; and still more so on the sessile barnacles 
(Diadema) commonly found attached, to whales. The variety known as chelonophilus 
is stated by Darwin to be found on one species of turtle, viz., “ Testudo ” caretta, but 
several specimens are recorded as from Chelone sp., and the number actually 
examined by students of the Cirripedes appears to have been small. The variety 
hunteri has usually been taken on the sea-snake Hydrus platurus, but has also been 
found attached to a telegraph cable and to the carapace of a crab ; the specimen from 
the mouth of the river Hughli, now in the collection of the Indian Museum, was 
apparently attached to a turtle. There does not, therefore, seem to be evidence that 
any of the varieties of the species is confined to one particular host. Although 
Conchoderma virgatum is reported to be a common species, the actual number of 
specimens recorded is by no means a large one. 
Genus Heteraeepas, Pilsbry (1907). 
Capitulum naked or provided with a pair of ill-defined chitinous scuta, the 
capitular membrane greatly thickened and more or less wrinkled on the 
surface ; the muscles of the peduncle extending upwards into the capitulum 
and forming a layer beneath the membrane. A single lateral appendage on 
each side, situated at the base of the first cirrus. Anal appendages long, 
multiarticulate. Mandibles usually with four teeth, the base of which bears 
numerous small spines; maxillæ excavated, their biting edge often irregular. 
This genus is divided by Pilsbry into two subgenera in accordance with the struc- 
ture of the fifth and sixth pairs of cirri. In the subgenus Paralepas the two rami of 
each of these appendages are approximately equal, while in the more typical forms 
the internal (posterior) rami are much reduced, being distinctly smaller and less well 
armed than the external (anterior) rami. 
^ Since this paper was in the press I have found a small example of the typical form of the species 
on the leg of a turtle {€helone imbricata) from the Bay of Bengal . — May ^rd, 1909. 
