685 



Page SO. Add another species: — 



Tryphosa compressa, G. 0. Sars. 



(Suppl. PL IV, lig. 2). 



Body comparatively slender and greatly compressed. Ceplialon about 

 the loigth of the 1st segment of mesosome and rather deep, with the lateral 

 cornel's greatly projecting, though narrowly rounded at the tip. Anterior 

 pairs of coxal plates very large, more than twice as deep as the corre- 

 sjjonding segments; 1st pair, as usual, narrowed distally, with the anterior 

 edge straight; 4th pair considerably expanded in their outer part, and angu- 

 larly produced below the posterior emargination; 5th pair not fully as broad 

 as they are deep. Last pair of epimeral plates of metasome angularly pro- 

 duced at the tip, posterior edge straight. First segment of urosome with a 

 compressed, biangular dorsal projection similar to that occurring in T. amjn- 

 lata. Eyes very narrow and slightly sigmoid in form, almost occupying the 

 entire height of the cephalon, pigment light red. Superior antennae rather 

 slender, about equalling in length tlie cephalon and the first 3 segments of 

 mesosome combined, 1st joint of the peduncle almost 3 times as long as the 

 other 2 taken together, flagellum about twice the length of the peduncle, and 

 composed of 12 articulations, the 1st of which about equals in length the 3 

 succeding ones combined; accessory appendage half the length of the flagellum, 

 and 6-articulate, 1st articulation not larger than the succeeding ones. In- 

 ferior antennae in female about the length of the superior, flagellum 14-ai'ticu- 

 late. Epistomal plate large and evenly rounded in front. Anterior gnatho- 

 poda of the usual slender form, propodos shorter than the carpus, oblong 

 linear in sliape, with the palm quite short and a little oblique, dactylus with 

 a well-marked secondary denticle. Posterior gnathopoda scarcely longer than 

 the anterior, propodos densely hirsute and of qixite an unusual size, being 

 much broader than the carpus and gradually widening somewhat, distally, palm 

 transverse and defined below by a projecting angle, dactylus rather strong and 

 curved. Pereiopoda comparatively slender, and of a structure similar to that 

 in the other species. Last pair of uropoda with the inner ramus somewhat longer 

 than the basal joint of the outer, and simple mucroniform. Telson oblong 

 triangular in form, gradually tapering distally, with 3 pairs of subdorsal den- 

 ticles, cleft very narrow, and extending nearly to the base. Colour in the 

 living state of the animal not yet stated. Length of adult female 8 mm. 



BemarJcs. — This new species, which was announced in a note to the 

 present work on page 76, is easily distinguishable from the other species by 

 the greatly compressed body, the form of the lateral corners of the cephalon. 



