of the Fishery Board for Scotland. 245 



sharp-pointed teeth, decreasing in size from the external edge. The basal 

 part of the mandible-palp is comparatively large, becoming dilated out- 

 wardly, and bearing a few small marginal hairs. • Apical joint elongate, 

 narrow, with two marginal and four terminal setae ; the secondary marginal 

 joint is very small (fig. 7). Posterior foot-jaws slender, the second joint 

 elongate, end joint very small, terminal claw very slender (fig. 8). The 

 first pair of thoracic feet somewhat like those of Tetragoniceps bradyi, 

 but the inner branches are three-jointed, the first very long, the last two 

 short. A small seta springs from near the distal end of the inner margin 

 of the inner branches, and the third joint bears two moderately long and 

 somewhat curved setae at the apex. The outer branches are three-jointed, 

 and do not reach the end of the first joint of the inner branches (fig. 9). 

 Inner branches of- the second, third, and fourth pairs short, and two-jointed ; 

 outer branches three-jointed, elongate, and slender (fig. 10). Fifth pair 

 two-jointed. Basal joint short, broad, and somewhat produced exteriorly 

 to an angular apex armed with two short spines ; while two small seta? 

 spring from the outer margin. Secondary joint very large and foliaceous, 

 sub-quadrate in form, and one and a half times longer than broad, and 

 bearing one small seta near the middle of the inner margin, and three 

 short, stout, spmiform, and two small seta? on the obliquely truncate apex 

 (fig. 11). Caudal stylets comparatively long and narrow, and about equal 

 in length to the last abdominal segment, and furnished with five terminal 

 setae, two of them being stout and spiniform, the other three slender. One 

 of the spiniform setae is short, and springs from the outer edge of the 

 stylet; the other is elongate, and forms the third from the outside. 



Habitat. — Off St Monans, Firth of Forth. Rather scarce. 



Remarks. — This species closely resembles Tetragoniceps bradyi in 

 general appearance as well as in a few anatomical details, but there are 

 important differences that may require its removal from the genus in 

 which it is provisionally placed. Two very important differences are 

 observed in the structure of the first and fifth pairs of thoracic feet. In 

 the first pair the inner branches are three-jointed, and the fifth pair are 

 two-branched. These two characters indicate a considerable divergence 

 from the typical Tetragoniceps ; but I prefer to leave it in that genus in 

 the meantime, pending a further study of the species. 



Genus Laophonte, Philippi (1840). 

 Laophonte depressa, sp. n. (PI. VI. figs. 24-31 ; PL VII. figs. 1-3.) 



Description. — Female. Length, '84 mm. (-g^th of an inch). Body elon 

 gate, depressed sub-cylindrical. Breadth across the thorax equal to fully one- 

 fourth of the length. The postero-lateral angles of the second, third, and 

 fourth abdominal segments produced and rounded. Rostrum broad, with 

 the apex rounded. Anterior antennae sparingly setiferous, shorter than 

 the first cephalo-thoracic segment, and composed of seven joints ; the 

 third joint is longer than any of the others, the fourth and fifth are 

 small. The proportional lengths of the joints are shown by the 

 formula : — 



12 • 11 • 15 • 5 ' 4 • 6 • 7 • 

 "T" T "2" -3 '4 r 5 • 6 • 7 • 



Posterior antennae robust ; the end joint is about equal in length to the 

 preceding one, and bears a few stout slightly curved spines on the 

 distal half of the upper margin and apex. A small secondary branch 

 with four terminal plumose setae springs from the middle of the first 

 joint (fig. 2, PI. VII.). Mandibles well-developed. The mandible-palp 

 is comparatively small, and consists of a narrow elongate joint, with one 



