240) Part TIT —WNineteenth Annual Report 
CYcLoPIDsé. 
Pterinopsyllus insignis, G. S. Brady. 
A few specimens of this somewhat rare species were obtained in some 
material collected in the Moray Firth about thirteen or fourteen miles 
north-east of Buckie, in about 50 to 55 fathoms, on November. 3rd, 1900 ; 
one or two of them were females, and carried small roundish ovi-sacs, 
—these are the first specimens of Pterinopsyllus which I have seen 
carrying eggs. 
Cyclopina gracilis, Claus. 
Specimens of this small but distinct species were obtained in the store 
pond of the Sea-Fish Hatchery at Bay of Nigg on October Ist, 1900. 
Cyclopina longifurcata, T. Scott (sp. n.). (Pl. XVII, figs. 5-14.) 
Description of the female.-—In this species the body is moderately 
stout, the forehead is narrowly but evenly rounded, and the abdomen is 
slender and elongated ; the caudal furca are very long and somewhat 
lamelliform, being rather more than half the length of the abdomen; the 
entire length of the animal from the forehead to the end of the furca is 
about 1:56 mm. (about 7; of an inch) ; (fig. 5). 
The antennules (fig. 6) are slender and about as long as the cephalic 
segment ; they appear to be composed of twenty-six joints, and are 
sparingly setiferous ; all the joints are short, but the ultimate and pen- 
ultimate joints are rather longer than the others; the formula shows the 
number and approximate proportional lengths of all the joints :— 
Number of the joints, - - - - 1.52.3 254 75). 1.218 .19 4(10 Se 
Proportional lengths of the joints,11. 4.4.3.3. A PD Pe ES VOR 
No.iof joints, , 13 $44 45,16. 4d dB. 19) 21.20 24 522, D3 a2 ee 
Prowlen..ofjts., 0) Dib le OL .AG G48 SEE LOM Bek Fees Baio eee ees 
os 
a 
The antenne are four-jointed, the joints are sub-equal and of moderate 
ength, the third and fourth joints carry one or two long, slender, plain 
sete at their distal extremities, the first joint is furnished with a few 
plumose hairs, three of which spring from a small tubercle situated near 
the distal end of the outer margin, as shown in the figure (fig. 7). This 
tubercle, with its fascicle of three plumose sete, is probably a rudimentary 
secondary branch. 
The mandibles are moderately stout, and provided with well-developed 
two-branched palps, the branches of which arise from a movlerately stout 
basal joint, the upper branch is two- but the lower is four-jointed, both 
branches carry several long plumose sete (fig. 8). The mandibles of this 
species have a general resemblance to those of Cyclopina littoralis, G. 8. 
Brady. 
The maxille, which are small, possess a distinctly two-branched palp, 
both branches of which are furnished with long plumose sete, the 
manducatory lobe bears on its inner distal aspect one or two moderately 
stout and several small setee, all of which are plumose (fig. 9). 
The first maxillipedes resemble those of Cyclopina littoralis, they 
are moderately stout, apparently six-jointed, but though the basal joints 
are dilated, the end ones are small; the marginal lobe-like processes of 
the second and third joints are each armed with a moderately stout and 
long claw-like spine and a few sete, while a number of stout plain sete 
spring from the margins and apex of the three end-joints (fig. 10). 
The second maxillipedes are also somewhat similar to those of Cyclopina 
littoralis. The first and second joints are elongated and moderately stout ; 
