FEOM THE QVLF OF GUINEA. 121 



apex of the outer branches ; the apex of the inner branches is also provided with similar 

 spines ; the inner branch of the fourth pair is 2-jointed (fig. 4G). Fifth pair subquad- 

 rangular, rather longer than broad, and furnished with two stout terminal spines. 

 Abdomen scarcely equal to half the length of the cephalothorax. Caudal stylets about 

 as long as broad, and three-fourths the length of the last abdominal segment. The 

 fourth tail-seta, counting from the outside, is stouter and rather longer than the others. 



HahitcU. Bananah Creek, Congo River, in a surface tow-net gathering, collected 

 Eebruary 6th. Only two specimens (females) were obtained. 



Genus Pseudanthessius, Claus. 



Pseudanfhessius, Claus, Arb. Zool. Inst. Wien, 1889. 

 PSETJDANTHESSITJS PUOPINQUITS, n. sp. (PI. XIII. figs. 49-56; PL XIV. figs. 1, 4.) 

 Length 1'3 mm. (l-18th of an inch). Anterior antennae 7-jointed; the formula shows 



the proportional lengths of the joints : — 



12 . 21 . 6 . 12 . 12 . 11 . 8 



12 3 4 5 7 



The short penultimate joint of the posterior antenna3 bears a long slender spine on its 

 upper distal angle ; the last joint is provided \vdth a stout curved apical spine and five 

 setae. Mandibles somewhat as in Lichomolgus congoensis, but the stylet-like appendage 

 is longer and strongly dentate on the upper edge, the basal tooth being much larger 

 than the others (PI. XIII. fig. 52). Maxillae armed with three stout terminal spines, 

 two of which are serrate on both edges, and a small marginal seta (PI. XIII. fig. 53). 

 Anterior foot-jaws stout, 1-jointed, and provided with four strong terminal spines, the 

 two larger of which are furnished with several tooth-like processes. Posterior foot-jaws 

 in the female short, 3-jointed ; the second joint carries two short, stout, marginal spines, 

 and the last joint, which is small, carries one terminal and four lateral seta3 (PL XIII. 

 fig. 54). In the male the posterior foot- jaws are more slender; the first and second 

 joints are fully twice as long as broad, and the inner margin is fringed with cilia ; the 

 last joint is very short and forms the base of a stout, elongate, curved claw, which is fur- 

 nished with two small setae near the base. The fourth pair of swimming-feet are nearly 

 as in Pseudanthessim Thorelli (Brady), but the margins of the 1-jointed inner branches 

 are not ciliate ; a moderately long plumose seta springs from the proximal half of the 

 inner edge (?and probably also from the outer edge opposite to the other) (PL XIV. 

 fig. 3). The first three pairs of swimmiug-feet are nearly as in Lichomolgus fucicolus. 

 The fifth pair consist each of a moderately stout joint, furnished with two apical spines. 

 Abdomen, inclusive of stylets, nearly equal to three-foiu'ths the length of the cephalo- 

 thorax : in the male the first segment is as long as the next two together ; in the female 

 the first segment is rather more than half the length of the abdomen, the remaining three 

 segments are as in the male. Caudal stylets once and a half the length of the last 

 abdominal segment, and furnished with one seta near the middle of the outer margin and 

 four apical setae. 



Habitat. Loanda Harbour, in a surface tow-net gathering, collected February 15th. 

 Very few specimens were obtained. 



SECOND SERIES. — ZOOLOGY, VOL. VI. 16 



