﻿CRUSTACEA MALACOSTRACA. II. 



85 



tlie cheli]ieds of tlie male agree so well with those of the female in se\-eral ]:)articiilars: leiig-tii in 

 proportion to depth or breadth of carpus and chela, ])rotrudin«- anterior angle of the hand, rather 

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

 wise geueralh' found in the chelipeds of the two sexes. The thickness and relali\-e length of the 

 two proximal joints of the antennuhe is also nearly the same in the two scxe.s, and ])erhaps the most 

 important character is the long peduncle of the m'opods in both sexes, as this joint in the male is 

 nearly 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. hracliiata the peduncle is much 

 shorter than the first joint of the eudopod. 



Occurrence. Taken b\- the "Ingolf" at the following station. 



Uavis Strait: St. 36: Lat. 61" 50' N.. Long. 56" 21' W., 1435 fm., teui]). 1.5"; 2 spec. ($ and <$). 



It ma\- be mentioned that the "Ingolf at Stat. 103: Lat. 66" 23' N., Long. S' 52' W., 579 fm., temp. 

 -^ 0.6°, captured a considerably smaller, ju\enile specimen, which is at least allied to /,. iiiicifera and 

 /,. dn/hifti, but the process from the peduncle of the uropods is very small and sidjhorizoiital, prob- 

 abh' not yet developed. 



(iroup c. L'ropcds ivitli the ciidnpod tiuo-/o/i//(d, ///r cxopod 7iv7/ iiinrked off', uiu -jointed. 



These characters pointed out are ver\' practical. But the group comjDrises in reality rather 

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

 natural subdivions. 



a. Pleopods wanting or extremely rudimentary in the females. The basal joint 



of the chelipeds normal, possessing a posterior j^rocess with the hind margin 



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



/?. Pleopods very distinct with well developed seta; in the females. The basal 

 joint of the chelipeds nortual. as in subdivision «. \'er\' stout species. 



Species 59 — 60. 



;-. Pleopods \'ery distinct with well developed sette 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 ce phalot h or a x at or e\en 

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

 the lower than 1.1 n the lateral side of the ceph alollu)rax. Species ()i 62. 



Group c, subdivision ,1. (vid. above). 



54. Leptognathia manca G. O. Sars. 

 (PL VIII, fig.s. 5a^5d.) 



1881. Lef^toi^iiafhid C'] iiiaiiea G. O. Sars, Arch, for Math. t)g Naturw, H. 7, p. 44. 



1896. — - — Account Crust. Xorwa> . \"ol. II, p. 30, PI. XI\', fig. 2. 



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

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



