CRUSTACEA MALACOSTRACA. III. 



C59 



104. Munnopsoides eximius n. sp. 



(PL XIV, figs, aa— 2n). 



Description. First joint of the antennulae (fig. 2 f) even slightly broader than the length 

 from the base to the insertion of second joint; the protuberance beyond that incision considerably bro- 

 ader than long, subtriangular, obtuse. — Antennae with the very long fifth joint feebly thickened to- 

 wards the end. — Maxillipeds (fig. 2 e) have the fifth joint somewhat produced at the inner distal 

 corner, and armed with two slender spines near the distal end of the outer (anterior) margin and 

 two spines at the inner margin; the two distal joints are small, the terminal reaching the inner angle 

 of fifth joint. 



Seen from the side (fig. 2 b) the dorsal line of the head and of the anterior half of the thorax 

 is in both sexes very convex; in the male the second segment has the dorsal line long with a strong 

 curvature of its own. First segment in both sexes well developed (fig. 2 a), and at the median line as 

 long as third segment; in the female second segment is only a little longer than the first, while in 

 the male it is very much longer and strongly vaulted, wherefore its upper margin is, seen from the 

 side, very convex, and besides its surface has a pair of submedian longitudinal excavations, so that it 

 shows three dorsal, rather broad but moderately low tubercular protuberances. The three posterior 

 segments were described above. — First pair of legs (fig. 2 g) very slender; fifth joint scarcely as thick 

 as the third and longer than the sixth, with some setse on the lower margin, and two of these are 

 robust. Second pair (fig. 2 h) in the female moderately slender; fifth joint scarcely as thick as the fourth 

 and not much longer than the sixth; the lower margin of fifth and sixth joints armed with numerous, 

 somewhat short spines; in the male these legs are distinctly thicker and somewhat longer than in the 

 other sex. Fourth pair in the female a little less than three and a half times as long as the body. 



Abdomen between twice and two and a half times as long as broad, a little longer than the three 

 posterior segments combined (fig. 2 a). To the description of the operculum in both sexes given in the 

 diagnosis of the genus may only be added that the copulatory organ measured from the base of the 

 vesicle to the end is more than three times as long as the pleopod. 



Length of a large female without marsupium 8-5 mm. and of its fourth leg 29 mm.; length of 

 the males 5 and 57 mm. 



Remarks. It is after prolonged hesitation that I establish this species as new instead of re- 

 ferring the animals to M.aitstralis Bedd., taken in Lat. 46°i6' S., Long. 48°27' E., off Marion Island. But 

 Beddard's figures, though evidently far from correct, differ so much from my specimens, that I do not 

 venture to refer them to his species. Beddard has described the first thoracic segment as quite different 

 from anything found in my animals. His figure and description of the antennae must be wrong, as 

 the shorter joint between the two very long joints of the peduncle cannot exist, and the joint in ques- 

 tion can only be the distal part of the very long fifth joint, which has been bent or broken somewhat 

 from its end, but when he figured this part as much thickened such thickening must exist, and it 

 far exceeds what was found in the distal part of that joint in the single antenna seen by me. Further- 

 more according to Beddard, and especially to a sketch benevolently drawn for me by Dr. Caiman, the 

 fifth joint of the maxillipeds has more spines on its outer margin than found by me. Beddard's figure 



