630 



batory lamellse large and broad. Pleopoda rather feeble. First pair of uro- 

 poda well developed, with the inner ramus much longer than the outer; 2nd 

 pair quite rudimentary, forming on each side only a small, unarmed lamella; 

 last pair entirely wanting. Telson rounded. 



Remarks. - This genus was established in the year 1859 by Bruzelius, 

 who pointed out its relation to the genus Dulifliia, and proposed to unite 

 both within the family Dulicltiidfe. Sp. Bate referred the species of Bruzelius 

 to the genus Cyriophium of Dana, which is the same as Platoplimm of the 

 same author. In external appearance the species of the latter genus bear, 

 it is true, a strong resemblance to those of the genus LcetmatopMlus; but 

 they are markedly distinguished by the much fuller development of the uro- 

 some and its appendages. The genus comprises 2 very nearly allied Nor- 

 wegian species, to be described below. The Rev. Mr. Stebbing has also 

 added another species from the Challenger Expedition, as L. punts. 



Laetmatophilus tuberculatus, Bruzel. 



(PI. 226). 



Lcetmatophilus tuberculatus, Brusselins, Skaud. Amph. Gamin.; Kgl. Svenska Veteusk. Akad. 



Hamll. new. series, Vol. III. p. 11, PI. 1, tig. 1. 



Syn.: Cyrtophium Danvini, Sp. Bate. 



tuberculatum, Sp. Bate. 



Body short and stout, with the metasome and urosome generally 

 folded in beneath the mesosome; the latter in female much broader than in 

 male. Cephalon nearly twice as long as the 1st segment of mesosome, and 

 having dorsally a small rounded tubercle. All segments of mesosome trans- 

 versely sulcated above, and having the lateral parts somewhat expanded; 1st 

 segment with 2 succeeding dorsal tubercles ; 2nd segment with a slight tubercle 

 in front of the sulcus; the succeeding segments scarcely tubercular, but having 

 the dorsal contour somewhat rugged. First pair of coxal plates in both 

 sexes very small, the 3 succeeding pairs in female comparatively broader 

 than in male. Epimeral plates of metasome very small and rounded. Eyes 

 slightly protuberant, rounded, with light yellowish pigment. Superior an- 

 tennae about equalling in length 3 A of the body, 1st joint of the peduncle 

 the shortest, the other 2 nearly equal-sized, flagellum scarcely as long as 

 the last peduncular joint, and composed of 3 articulations, the 1st of which 

 1 times as long as the other 2 combined. Inferior antennae a little longer 



