CRUSTACEA MALACOSTRACA. II. 



85 



tlie chelipeds of the male agree so well with those of the female in several particulars: length in 

 proportion to depth or breadth of carpus and chela, protruding anterior angle of the hand, rather 

 narrow movable finger and general shape of the fixed finger, and this agreement is larger than other- 

 wise generally found in the chelipeds of the two sexes. The thickness and relative length of the 

 two proximal joints of the antennuke is also nearly the same in the two sexes, and perhaps the most 

 important character is the long peduncle of the uropods in both sexes, as this joint in the male is 

 nearl\- as long as, in the female .slightly longer than, the first joint of the eudopod, while in the 

 females of all preceding species of the genus excepting the large L. brachiata the peduncle is much 

 shorter than the first joint of the endopod. 



Occurrence. Taken by the "Ingolf" at the following station. 



Davis Strait: St. 36: Lat. 6i°5o' N.. Long. 56° 21' W., 1435 fm., temp. 1.5°; 2 spec. (? and <$]. 



It may be mentioned that the "Ingolf" at Stat. 103: Lat. 66" 23' N., Long. 8° 52' W., 579 fm., temp. 

 -=- 0.6°, captured a considerably smaller, juvenile specimen, which is at least allied to L. uncifera and 

 L. dcntata^ but the process from the peduncle of the uropods is very small and subhorizontal, prob- 

 abl\- not yet developed. 



GroTip c. Uropods with tlic endopod hvo-jointcd, the exopod 'veil marked off, one-jointed. 



These characters pointed out are very practical. But the group comprises in reality rather 

 heterogenous elements, and its nine species mentioned on the following pages may be referred to three 

 natural subdivions. 



«. Pleopods wanting or extremely rudimentar\- in the females. The basal joint 

 of the chelipeds normal, possessing a posterior process with the hind margin 

 free and rounded. Slender species. Species 54 — 58. 



ft. Pleopods very distinct with well developed setse in the females. The basal 

 joint of the chelipeds normal, as in subdivision a. \'ery stout species. 



Species 59 — 60. 



y. Pleopods very distinct with well developed setie in the females. The basal 

 joint of the chelipeds aberrant, in a lateral view the long major part of its 

 posterior margin is vertical and attached to the cephalothorax at or even 

 before its middle, while the posterior process is short and situated more on 

 the lower than on the lateral side of the cephalothorax. vSpecies 61^62. 



Group c, subdivision « (vid. above). 



54. Leptognathia manca G. O. Sars. 

 (PI. VIII, figs. 5a-5d.) 



1881. Leptognathia {-?J manca G. O. Sars, Arch, for Math, og Naturv., B. 7, p. 44. 



1896. — — — Account Crust. Norway, Vol. II, p. 30, PI. XIV, fig. 2. 



Though Sars' description and figures are sufficient for the recognition of this species, I tliink 

 it useful for comparison with the following forms of this subdivision to give a new description and a 



