﻿86 



CRUSTACEA MALACOSTRACA. II. 



couple of analytical figures of the female, together with corresponding figures of the hitherto unknown 

 subadult male. 



Female. The shape of the body from above is shown well by Sar.s' fig. 3: third to sixth 

 thoracic segments have their lateral margins far from parallel, but conspicuously though not strongly 

 angular, and the bod\- tapers in breadth from the third segment. 



Antennula; (fig. 5 a) considerably shorter than the carapace. First joint a good deal shorter than 

 the other joints combined, about twice as long as deep, considerably tapering; second joint slightly 

 more than half as long as tlie first and much produced above; upper margin of third joint distinctly 

 less than half as long as that of the second; fourth joint about as long as the second and a little 

 shorter than its terminal setae. — Antennae with fourth and fifth joint conipleteh- fused, without an\- 

 vestige of an articulation between them. 



Chelipeds (fig. 5a) somewhat slender. Basal joint not much longer than the distance between 

 the rounded hind margin of its well developed posterior process and the front margin of second seg- 

 ment. Carpus almost twice as long as deep, with the lower margin feebly convex. Chela a little 

 longer than the carpus, two and a half times, or even more, as long as broad; hand without any pro- 

 truding anterior angle at the insertion of the finger, and this finger is about as long as the front 

 margin of the hand; fixed finger slightly Inoader tlian the movable, with the teeth on the incisive 

 margin distinct. 



Second and third pairs of legs (fig. 5a) moderately strong or moderately slender; the spine on 

 the posterior angle of fourth joint about as long as the fifth joint, which is somew-hat shorter than 

 the sixth joint, while the spines on its distal angles are long, though sliorter than the joint; seventh 

 joint with claw about as long as the sixth joint. — Three posterior pairs of legs es.sentially as in the 

 S(7/-s//-gTonp. 



Abdomen (fig. 5 b) with the lower margin of the five anterior segments conspicnousl\- convex, 

 Ijut not shaped as tubercles. — Uropods moderatel)' long, conspicuously longer than the sixth seg- 

 ment; peduncle a little longer than deep, conspicuously shorter than the first joint of the endopod, 

 which is slightly shorter than second joint; the one-jointed exopod nearly as long as, or slightly 

 longer than, the first joint of the endopod. 



Ivcngth of a female with marsupinm 2""", of a female without marsupinm 2.2"'"'. 



Subadult Male. In the main as the female, but it differs by much thicker antennnlae and 

 in the abdomen. The antennulse (fig. 5 c) are conspicuou.sly longer as compared with the carapace 

 than in the female, only four-jointed, and their three proximal joints together with the proximal part 

 of fourth joint are much thicker than in the other sex. — The five anterior abdominal segments 

 (fig. 5d) are longer than in the female, and the median ventral margin of each .segment is shaped as 

 a moderately high, subtriangular tubercle with the end rounded. The pleopods are somewhat long 

 with the outer ramus much longer than the peduncle and longer than tlic inner ramus; the terminal 

 setae about as long as the rami. — Length 1.8'""'. 



Remarks. L. viatica differs from L. ventralis n. sp. by a different shape of second and third 

 antennular joints, by having no ventral process on the second thoracic segments and by the posterior 

 margin of the basal joint of the chelipeds being rather remote from the front end of the second 



