637 



Occurrence. — I have only met with this form oif the coast of Fin- 

 mark (Hammerfest and Varde), in depths ranging from 30 to 50 fathoms, 

 especially on hard bottom among Hydroida and Polyzoa. 



Disfribu/ion. — Greenland (Kreyer), Spitsbergen (Goes) 



5. Dulichia porrecta, Sp. Bate. 



(PI. 229). 

 Dyopedos porrectus, Sp. Bate, Ann. Nat. Hist. 2 ser. Vol. XIX, p. 1.51. 



Body smooth throughout, being considerably more slender in male 

 than in female. Cephalon not carinated above, but somewhat produced in 

 front above the base of the superior antennae. First pair of coxal plates in 

 both sexes small, quadrangular; 2nd pair in male larger than in female and 

 pi'oduced in front to an acute projection; the succeeding pairs very small, 

 broader than they are deep. Eyes rather large, rounded, and slightly pro- 

 tuberant, pigment dark red. Antennae slender and edged posteriorly with 

 numerous fascicles of delicate bristles; the supeinor ones about the length of 

 the whole body, 1st joint of the peduncle, as usual, quite short, 3rd joint 

 somewat longer than the 2nd, flagellum about the length of the former, and 

 5-articuIate, accessory appendage very small, 3-articuiate, Inferior antennae 

 somewhat shorter than the superior, and having the flagellum about as long 

 as the last peduncular joint. Anterior gnathopoda with the carpus less 

 expanded than in the preceding species, propodos much shorter than the 

 carpus, and having the lower edge quite straight. Posterior gnathopoda in 

 female fully as long as the anterior, propodos rather narrow and elongated, 

 being about twice as long as the carpus, and gradually tapering distally, 

 dactylus rather short ; those in male exceedingly elongated, with the basal 

 joint long and slender, carpus comparatively small, propodos very large, 

 being nearly 3 times as long as the carpus, and denselj^ setiferous below, 

 palm produced in front to an acuminate projection, and defined posteriorly by 

 a long, lanceolate, thumb-like process, pointing straight forwards, dactylus 

 very much elongated, setous in its outer part, and having at the base inside 

 a tuberculiform prominence. The 2 anterior pairs of pei'eiopoda of moderate 

 size, with the basal joint considerably dilated in the middle ; the 3 posterior 

 pairs not very much elongated, and but sparingly spinous. First pair of 

 uropoda with the basal part minutely spiuulose outside, inner ramus consider- 

 ably longer than the outer, and having the inner edge minutely spinulose be- 

 tween. the marginal spines. Second pair of uropoda and telson of the usual 



81 — Crustacea. 



