204° Part IIL—Eleventh Annual Report 
not been observed in the Forth beyond the area referred to, while others 
are not so restricted, and have been obtained in different localities—sea- 
ward as well as inshore. 
Delavalia emulu,* sp. n. (provisional name). (Pl. IV. figs. 36-47.) 
Length, ‘73 mm. Similar in form to Delavalia reflexa, Brady and 
Robertson. Anterior antennz of the female nearly as in Deluvalia 
robusta, Brady and Robertson; male anterior antennz nine-jointed, 
hinged between the sixth and seventh joints; a sensory filament springs 
from the end of the fourth joint in both sexes, but that of the female is 
shorter. ‘The formula shows approximately the relative length of the 
joints of the antennee in both male and female :— 
Pemale antenne,*. 20 O° C8 G2 4e2 78) iG 
102 5B ud iti Ge areas 
Male antenne, 2 2A Me bs 5)? TORTR RRS F 
Secondary branch of posterior antennee three-jointed, middle joint very 
small. Basal joint of mandible palp—elongate—about three times longer 
than broad; the branches, which are subequal, are less than half the length 
of the basal joint. Posterior foot-jaws nearly as in Delavalia robusta, the 
last jot short, narrow, and curved, and appearing to be merely a con- 
tinuation of the base of the terminal claw (fig. 41). Both branches of 
all the four pairs of swimming feet—except the inner branches of the 
second pair in the male—three-jointed ; the inner branches.of the first 
pair are rather longer than the outer, and the first joint is about one 
and a half times longer than the next one (fig. 42). The second 
joint of the inner branch of the second pair in the male is nearly twice 
the length of the first joint, and probably consists of two coalesced 
joints, rather slender, and with the inner margin of the proximal half 
strong, gibbous, and turnished with a plain, flexuous, terminal seta 
fig. 43). Fifth pair in both sexes nearly as in Delavalia reflexa, except 
that the basal joint carries one very small and four elongate stout plumose 
setae, and the outer joint six plain sete. Caudal stylets about equal in 
length to the last abdominal segment. ‘The inner of the two principal 
caudal setae very long, equal to the combined length of the abdomen and 
caudal stylets. 
Habitat.—Largo Bay. Not rare. 
Delavalia ceemula differs especially in the inner branches of the first 
pair of swimming feet being three-jointed, and seems otherwise to com- 
bine characters belonging to all the other three British genera. 
Genus Cletodes, Brady (1872). 
(1) Cletodes tenuiremis, sp. n. (provisional name). (PI. III. figs. 21-28.) 
Animal resembling Cletodes linearis (Claus). Length, -96 mm. <An- 
terior antenne seven-jointed, basal points robust ; all the joints, with the 
exception of the first, subequal in length. The approximate length of the 
joints are shown by the formula— 
be lisa AG CE i 
SI ss ie al 
Eee 
56 
Secondary branch of posterior antennz small, uniarticulate, and bearing 
two short terminal sete. Mandible palp consisting of a small one-jointed 
branch (fig. 24). The first pair of swimming feet have the inuer branches 
* Aymulus, an imitator. 
