246 Part III. — Tenth Annual Report 



twenty-four-jointed, the proportional length of the joints as in the for- 

 mula 



i8-20'6-6-5-5-5-7-4- 4- 4' 7' 6' 7' 6' 6' 5' 5- 6' 6' 7 ' 9 '10' 8 

 1 • 2-3 -4 -5 -6 -7 -8 -9 '10 '11 -12 -13 '14 -15 -16 -17 '18 '19 -20 -21 '22* 23 '24 



Sparingly setiferous ; there appears to be a depressed lobe-like process upon 

 the distal end of the first or proximal end of the second joint (fig. 2). 

 Antennas the same in both sexes ; posterior antennae nearly as in Calanus 

 finmarehicuSj but the primary branch is somewhat shorter proportionally ; 

 mouth organs also as in that species. First four pairs of swimming feet as 

 in Pseudocalanus elongatus, fifth pair in the female simple, one-branched, 

 two-jointed, small ; first joint about one and a half time longer than 

 broad ; the second joint about twice as long as the first, diminishing in 

 breadth from the base to the apex, and bearing two small marginal spines 

 — one opposite the other — on the distal half. The female fifth feet re- 

 semble somewhat those of Candace pectinata. Fifth pair of feet in the 

 male long and forming a powerful grasping organ ; both feet are one- 

 branched and four-jointed ; the two last joints of the right foot are elongate 

 and slender, the ultimate joint being strongly curved outward in its upper 

 half and forming a long powerful claw. The left foot is rather shorter than 

 the other, and terminates in two digitiform processes between which the 

 claw-like terminal joint of the right foot interlocks. Abdomen short ; in 

 the female four-, in the male five-jointed, the last segment shorter than 

 either of the others. Caudal stylets short, length about equal to the 

 breadth, and furnished with four long subequal setae, and a few small hairs. 



Habitat. — Off St Monans, Firth of Forth. Several specimens were ob- 

 tained. 



This comes very near Pseudocalanus, and but for the presence of a fifth 

 t>air of feet in the female, and the powerfully developed fifth feet of the 

 male, would have become a member of that genus ; as it is, the affinities of 

 Stephos minor seem to be with Pseudocalanus on the one hand, and 

 Candace or Acartia on the other. 



Family Misophrtadje, Brady (1878), . 



Pseudocyclopia, nov. gen. (provisional name). 



Body robust, and resembling Psevdocyclops in general appearance. Head 

 anchylosed with thorax. Basal joint of the anterior antennae very large 

 and nearly half the entire length of the antenna. The primary branch of 

 the posterior antennae three-jointed, the middle joint long; secondary 

 branch large but scarcely so long as the primary branch, five-jointed, the 

 third and fourth joints small, Mouth organs nearly as in Calanus. The 

 outer branches of the first four pairs of swimming feet three-jointed, and 

 longer than the inner branches ; the inner branch of the first pair one- 

 jointed, of the second pair two-jointed, of the third and fourth pairs 

 three-jointed ; the first basal joint of the third pair bears a long stout 

 spine on the inner distal angle, longer than the inner branch. The fifth 

 pair of feet in the female are small, one-branched, two-jointed, the first 

 joint short, subrotund ; the fifth feet in the male, elongate, one- or two- 

 branched, unequal on the two sides, and forming powerful grasping organs. 

 Abdomen in the female four-, in the male five-jointed, 



Pseudocyclopia crassicornis, n. sp. (provisional name). (PI. VII. figs. 

 15-29). 



Length, exclusive of caudal setae, '66 mm. Cephalo-thorax robust, four- 

 jointed, the first segment more than twice the combined length of the 

 other three. Abdomen small, five-jointed in the male, four-jointed in the 

 female; rostrum short, directed downwards, Anterior antennae short, 



