56 G. 0. SARS, [.\. S. lY 



of metasome. and Laviug the anterior edge considerably curved in the middle. 

 Frontal spine (see PI. I, fig. 2) rather large and freeh' projecting between 

 the insertion of the eyes. The latter (ibid.) comparatively short, scarcely pi-o- 

 jecting beyond the sides of the carapace, corneal part somewhat dilated and 

 distinctly eniargiuated on the dorsal face. Superior antennae with the i)e- 

 duncle (PI. 1, fig. 3) of the usual somewhat club-shaped form, its last joint 

 being rather dilated, and provided along the inner edge and the tip with a 

 dense series of strong plumose setse, inner flagellum nearly 3 times as long 

 as the peduncle and about half the length of the outer; male appendage 

 (see PI. II, fig. 2) not fully as long as the peduncle and of the usual struc- 

 ture. Inferior antennte (PI. I, fig. 4) having the basal part produced at the 

 outer corner to a strong triangular projection; scale very large, nearly twice 

 the length of the peduncle of the superior antennae, and oblong sublinear in 

 form, fully 3 times as long as it is broad, outer edge perfectly straight and 

 produced at the end to a strong spiniform projection, inner edge slightly 

 arcuate in its proximal part, tip narrowly truncated and carrying about 1 -i 

 of the marginal setae, apical segment indicated by a slight suture cutting off 

 a small part of the scale at the inner corner (see PI. I, fig. 5). Pereiopoda 

 (PI. II, fig. 8) with the meral joint shorter than the ischial one and exhibit- 

 ing interiorly several fascicles of strong setae, tarsal part about the length of 

 the meral joint and having the 2 middle articulations the largest, last arti- 

 culation rather small. Outer ramus of 3'^ pair of pleopoda in male (PI. II, 

 fig. 10) scarcely more than half the length of the inner; 4*"' pair (PI. II, 

 fig. 11) reaching nearly to the tip of the telson, and having the exterior 

 flagellum of the outer ramus about lialf as long as the stem. Telson (PI. I, 

 fig. 11, PI. n, fig. 13) very much prolonged, considerably longer than the 

 last segment of metasome, and gradually tapering distally, lateral edges 

 nearly straight, and each armed with about 20 spinules, the outermost of 

 which is far removed from the tip, apical incision (see PL I, fig. 12, PI. II, 

 fig. 14) very small, narrowly rounded at the bottom, and armed with a small 

 number (from 3 to 7) of dentiform projections, terminal lobes narrow conical 

 and scarcely diverging, npical spine much stronger than the lateral ones. 

 Inner lamella of uropoda (PI. II, fig. 1 2) reaching but little beyond the telson, 

 its base not very much tumefied and having the otolith comparatively small, 

 inner edge armed, below the marginal setae, with about 10 slender spines, 

 the outer 2 of which are placed at some distance from the others. Dorsal 

 face of body ornamented (see PI. I, fig. 1, PI. II, fig. 1) with dendritic rami- 

 fications, issuing from a number of pigmentary centres placed in the usual 

 manner. Length of adult female (including the antennal scales and caudal 

 appendages) reaching 26 mm; that of male somewhat less. 



Melanges biologirjue*. T. XIII, p. 40-t. 



