Po be re Br Ay Bs Bre 8 28-6 S 
eee bx 6° 7'° 8° 9 10" 1) 12 13> Lae TS 16 - 
Peace antennee three jointed, the middle joint elongate with two small 
setze on the exterior margin, and the last joint’ with a number of apical 
setee, Secondary branch large, five-jointed, but shorter than the primary 
branch, the third and fourth joints very small. Mandibles small, consist-. 
ing of a broad biting part, and a two-branched palp—one of the branches 
being two-, the other threejointed. Anterior foot-jaw small, four-jointed, 
with several marginal setiferous processes. The basal joint of the posterior 
foot-jaw elongate, the lower distal angle produced, with a blunt tooth-like 
process ; second joint also elongate, slender ; the last four Joints small and 
setiferous. The outer branch of the first pair of swimming feet three- 
jointed, each joint armed with a stout spine at the outer distal angle, the 
inner branch one-jointed and rather longer than the first joint of the outer. 
branch. . The outer branch of the second pair is also three-jointed. Each» 
of the first and second joints bear one, and the last joint four, stout: 
spines of variable length, that of the second joint and the terminal spine 
of the last joint being larger than the others; the inner branch is two- 
jointed and shorter than the outer one, and the first joint is rather smaller 
than the second. The third and fourth pairs have both branches three- 
jointed. A stout and nearly straight spine—longer than the inner branch— 
springs from the inner distal angle of the first basal joint of the third 
pair, otherwise the third and fourth pairs are similar. The fifth pair im 
the female is one-branched, two-jointed, the first joint short and somewhat 
dilated ; the extremity of the second i is produced into two elongate spini- 
form. processes (these are not spines articulated to the end of the joint but 
are Bay epeations of it), the inner one much longer than the other ; there 
is also a subapical spine exterior to the two processes. and shorter than 
either, Fifth pair in the male also one-branched, four-jointed, and elongate; 
that of the left (?) very slender. -The first joint of the right (2) foot is 
short and dilated, the second and third long, the last very’ small and- 
furnished: with a marginal hooklet and a subapical digitiform process. 
Caudal stylets short, each bearing four long, plumose, terminal sete, the 
two middle ones being stout and spiniform. Spermatophore elongate, 
narrow, curved, and showing under the ad a beautifully ‘Teti: 
culated structure (fig. 29). 
Habitat. —Of St Rats Firth of Forth. Several specimens were, 
obtained. © 
Pacudocyelopia minor, n. sp. (provisional name). (Pl. VIII: figs. es iat 
- Lensth, exclusive of caudal sete, -43 mm. Cephalothorax ‘robust, four- 
jointed, fitst segment large, more than twice the combined lengths of the ' 
other three. Anterior antenns short, setiferous, seventeen-jointed, the 
basal joint large, provided with a hook-like spine on the outer margin and ° 
near the middle of the joint, and’ with a sensory filament at the outer 
_ distal angle ;' the fourth, seventh, ninth, and thirteenth joints are also each’ 
furnished with a small sense-organ. The proportional length of the joints: 
are very nearly : as shown in the annexed formula | | 
eee 2 89°38 8: 8 8s Oh Bs weg: Bl 
ae 8 TR Tag cee 17 
