254 Part LI1—Twelfth Annual Report 
Leptopsyllus typicus, sp.n. (Pl. IX. figs. 2-11.) 
Description.—Female. Length, ‘74 mm. (;th of an inch). Anterior 
antenne elght-jointed, short and robust; the fifth, sixth, and seventh 
joints are shorter than any of the others. The formula shows the pro- 
portional lengths of the joints :— 
18 NO SNC oe8 tee moe 
JTRS Ja SGI VON 76 Pincay 
Posterior antennz composed of three moderately long joints; and the 
small one-jointed secondary branch springs from near the end of the first 
joint (fig. 4). The two-jointed branch of the mandible-palp has the first 
joint elongate, and furnished with a marginal second joint, very short, and 
provided with three terminal hairs (fig. 5). Maxillesas in Cylindropsyllus. 
Anterior foot-jaws stout, two (or three) jointed, furnished with three 
marginal processes, each with two small spinulose terminal sete ; the 
distal end of the second joint is produced, and supports a stout curved 
spine. Ina notch near the distal end of the second joint there is what 
locks like a rudimentary third joint, from which spring three small sete 
(fig. 6). Posterior foot-jaws slender, three-jointed, the end joint small. 
The terminal claw is very long and slender, and is accompanied by a 
spiniform seta nearly equal to half the length of the claw (fig 7). Both 
branches of the first pair of swimming-feet are short and two-jointed, and 
somewhat widely apart ; the second joint is rather shorter than the first in 
both branches (fig. 8), The second and third pairs are only one-branched, 
the inner branches being apparently entirely absent. Each branch consists 
of three joints, the middle one being shorter than the one on either side. 
The first two joints are each armed with a moderately stout slightly 
curved spine on the outer distal angles, while the last joint carries two 
terminal spines (fig. 9). In the fourth pair the inner branches are 
slender and two-jointed. The end joint is small, and provided with a 
moderately stout terminal spine. The outer branches are three-jointed. 
The joints are sub-equal, and armed similar to those of the second 
and third pairs (fig. 10). Fifth pair small and foliaceous. Each 
consists of a basal and a secondary joint. The inner portion is produced 
into a sub-cylindrical lobe, rounded at the end, and bearing two terminal 
hairs. The outer portion is also produced, but not so much as the inner 
portion, and bears one hair. The small secondary joint is situated in the 
hollow between the two produced portions of the basal joint, and is fur- 
nished with three terminal hairs (fig. 11). Caudal stylets elongate, and each 
composed of two distinct joints. The first joint is about one and a half 
times the length of the last abdominal segment, and about three times 
longer than broad, and has the inner distal angle produced into a blunt- 
pointed tooth-like process. The second joint (or appendage to the stylets) 
is of an elongate oval form, and equal to about one-third the length of 
the first joint to which it is attached by a narrow hinge-like articulation. 
Habitat.—West of Queensferry. Washed from lumps of hardened 
mud composed of the agglutinated tubes of a species of Sabella. Rare. 
No males have yet been observed. 
Genus Dactylopus, Claus (1863). 
Dactylopus stromii (Baird). 
1850. Canthocamptus stromit, Baird (2), p. 208, pl. xxvu. fig. 3. 
1880. Dactylopus strom, Brady (8), p. 3, pl. lv. figs. 1-138. 
1892. Dactylopus stromit, Canu (11), p. 159. 
1893. Dactylopus stromit, I. C. Thompson (33), p. 27, pl. xxii. 
fig. 4-a, b. 
