688 



Podoprionella norvegica, G. 0. Sars, n. sp. 



(Suppl. PI. V). 



Body quite smooth, and of an unusually short and compact form, with 

 the anterior part ratlier tumid, and the back greatly vaulted; metasome 

 and urosome combined much shorter than the mesosome. Cephalon com- 

 paratively short and deep, with the lateral corners somewhat projecting and 

 narrowly rounded at the tip. Anterior pairs of coxal plates rather broad, 

 though not much deeper than the corresponding segments; 1st pair of an 

 irregularly rounded orm; 4th pair very much expanded in their outer part, 

 forming a large, angular lobe below the posterior emargination ; 5th pair 

 unusually small, nearly twice as broad as they are deep, and having the 

 posterior lobe larger than the anterior. Last pair of epimeral plates of meta- 

 some produced at the lateral corners to a small, upturned dentiform projection, 

 posterior edge, above this, considerably curved and quite smooth. Seg- 

 ments of urosome smooth above. Eyes of moderate size, rounded oval in 

 form, with about 10 large and strongly refractive lenses, pigment dark brown. 

 Superior antennae with the joints of the peduncle successively diminishing in 

 size, flagellum shorter than the peduncle, and composed of 5 articulations; 

 accessory appendage small, biarticulate. Inferior antennae scarcely as long as 

 the superior, flagellum somewhat exceeding half the length of the peduncle 

 and 4-articulate. Anterior gnathopoda very strongly developed, with the 

 propodos rather tumid and exceeding in length the 3 preceding joints com- 

 bined, chela distinctly forcipate and fully occupying the outer third part of the 

 propodos, dactylus strong and curved, thumb of about same length, and acutely 

 produced at the tip. Posterior gnathopoda considerably more elongated and 

 very slender, being finely setous in their outer part, propodos narrow linear 

 in form, and exceeding half the length of the carpus, tip minutely chelate. 

 Anterior pairs of pereiopoda comparatively elongated and nearly naked, 

 propodal joint longer than the carpal one. The 3 posterior pairs of pereiopoda 

 but little different in length, basal joint in all very large, oval in form, with 

 from 12 to 14 coarse serrations on the posterior edge, the inferior of which 

 ;ire truncated at the tip, propodal joint about the length of the 2 preceding 

 joints combined, dactylus of moderate length and nearly straight. The 2 

 anterior pairs of uropoda with the rami subequal in length, the inner one 

 ! opposite serrations, the outer with 2 serrations on the outer edge only, 

 vvith the inner ramus scarcely more than half as long 

 Ison of a rounded form, with a small indentation on eacli 

 the obtusely rounded tip. Body pellucid, with alaint yellowish tinge 



