﻿CRlTSTACIvA MALACOSTRACA. II. 



83 



as in the species of group a, scarcely as lonj^ as ilic two pcxsterior segments combined; pednncle twice 

 as long as deep, distinctly more than half as long as the first joint of the endopod ; the joints of the 

 endopod subequal in length and the first joint cons])icuously less than twice as long as llie two- 

 jointed exopoil. 



Length of a female witii marsnpium 3.3""", of a female without marsupiuni 3.1""". 



vSuhadnlt Male. — The antennuhe five-jointed and as usualh- much thicker than in the 

 female. In my single specimen the ventral tubercles on the four anterior abdominal segments are 

 somewhat higher than in the females, while the tubercle of the fifth segment is obtuse, but probably 

 damaged or misshaped. The pleopods are well developed (fig. 3fl; as fig. e, representing a pleopod of 

 the female, and fig. 3f, representing that of tlie male, were drawn with the same degree of eidargement, 

 the comparison between these two figures will convey an idea of the enormous difference in size and 

 de\-elopment, and it ma\- be added that the female is considerately larger than the subadult male in 

 question. The endopod is nearly twice as long as the peduncle and has its distal rounded margin 

 furnished with sette as long as the ramus; the exopod is .somewhat longer than the endopod, but the 

 seta; along the terminal margin are onl\- as long as those of the endopod. — Length of the spec- 

 imen 2.4""". 



Remarks. A. iiihercnlatti is more slender than an\- among the above-described species; the 

 female is easily recognized by the nearh' rudimentar\- pleopods and the de\-elopnient of the \cntral 

 abdominal tubercles. The shape of the chelipeds and the relative length of the joints of the anten- 

 nulre afford additional characters. 



Occurrence. The species has been taken bv the "Ingolf" at two deep-sea stations in the 

 warm area. 



Davis Strait: St. 24: Lat. 63°o6' N., Long. 56° 00' W., 1199 *"'"•' Ifnip. 2.4"; 4 spec. 

 — — vSt. 36: I^at. 61" 50' N., Long. 56° 21' W., 1435 fni., temp. 1.5"; i spec. 



53. Leptognathia uncinata n. sp. 

 (PI. VIII, fig.s. 4a--4i.) 



Female (without marsupiuni). This species is closeh' allied to L. drufifrrn (i. O. Sars. of 

 which a co-t\pe presented b\- Sars himself has been examineil. The two species agree with one an- 

 other in the following more important particulars. The antennuUe are characteristic (fig. 4a1; first 

 joint is consideral)l\- shorter than the three others combined, \er\ thick, conspicuoush- less than twice 

 as long as deep; second joint is unconnnonh- long and thick, about two-thirds as long as the first, 

 somewhat produced above, and its upper margin a little longer than the two distal joints cmnbined 

 and a little more than twice as long as the depth of the joint. - Antennji; with fourtii joint about 

 half as long as the fifth, and the articulation between tliem feebly developed. Chela (fig. 4b) as long 

 as the carpus, twice as h.mg as broad, with the two set;e on the posterior margin extremeh' thick; 

 the anterior distal angle above the insertion of the movable finger is protruding and even produced 

 as a short, obtuse process. — Second ]iair of legs (fig. 4c) with fifth joint a little shorter than the 

 fourth and (.inl\- half as long as the sixth, which is consiilerably longer than seventh joint with claw 



