630 



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

 poda well developed, with the inner ramus muoh longer than the onter; 2nd 

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

 last pair entirely wanting. Telson rounded. 



Bemarl;s. — This genus was established in the year 1859 by Bruzelius, 

 who pointed out its relation to the genus Dttlirhia, and pi'oposed to unite 

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

 to the genus Cipiophium of Dana, which is the same as I'latophinni 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 LcrfmafopliiJns; 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 lias also 

 added another species from the Cliallenger Expedition, as L. piirus. 



Laetmatophjius tuberculatus, Bruzel. 



(PI. 226). 



L(etnuitnphilns tuhprculatus, Bruzelius, Skaud. Anipb. Gauim.; Kgl. Svenska Vetensk. Akad. 

 Handl. new. series, Vol. III. p. IJ, PI. 1, fig. 1. 



Syn.; Cyrtophium Darwiui, Sp. Bate. 

 » — tuberculatum, Sp. Bate. 



Body short and stout, with the metasome and urosome generally 

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

 male. Cephalon neaidy 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 

 m 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 rouiuled. Eyes 

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

 tennae about equalling in length 7* 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 

 is 3 times as long as the other 2 combined. Inferior antennae a little longer 



