83 
feature I failed to detect when deseribing tbe species, owing to 
my desire not to injure a unique specimen more than was neces- 
sary. The anal appendages are somewhat broader than I originally 
thought, and the inner margin is distinctly convex. 
S. kampeni is closely allied to H o e k ’ s >S. pollicipedoides, from 
which it may be distinguished, so far as the external characters 
of the hermaphrodite are concerned, by the faet that the dorsum 
of its carina is not undulated and that the rostrum is relatively 
mueh smaller. There are also distinet anatomical differences, while 
the male is relatively mueh narrower than that of Hoek’s species 
and exhibits less separation between the capitulum and the peduncle. 
It is perhaps worthy of note that S. kampeni appears to be 
the common species of the genus in the Gulf of Siam, just as 
S. squamuliferum is in the deeper parts of the Bay of Bengal 
and S. rostratum in the east of the Malay Archipelago in shallow 
water. 
Fam. Lepadidæ. 
Lepas anserifera, Linn. 
Several small but typical specimens attached to floating wood. 
One individual from between Koh Mesan and Cape Liant has a 
pale vertical stripe on one side of the peduncle. It is accompanied 
by four normal individuals. 
The range of this species, which is mueh commoner than any 
other Lepas in eastern seas, is practically cosmopolitan. 
Pæcilasma (Trilasmis) eburneuin, Hinds. 
Three specimens on spines of a sea-urchin from Koh Kram 
(2—iii—1900); one specimen on a spine of Plococidaris bispinosa 
from the same locality (23—ix—1900), and one on a spine of 
the same cidarid from Koh Chuen; all from a depth of 30 fms. 
In Dr. Mortensen’s collection there are also several minute 
individuals that belong to this subgenus and are probably the young 
6 * 
