339 



length of tlie first 3 segments of mesosome combined and very tumid, forming •• 

 on each side a broadly rounded, umboniform prominence, front transversely 

 truncated, without the slightest trace of any rostral projection, lateral lobes 

 of cephalon broadly rounded- First pair of coxal plates expanded in their 

 outer part to a narrow linguiform lobe stretching along the lower side of the 

 cephalon and densely fringed with setae; 2nd pair rather narrow; 3rd pair 

 somewhat broader but less deep, and having the distal edge distinctly insi- 

 nuated; 4th pair obliquely quadrangular in form, and scarcely as deep as the 

 corresponding segment; 5th pair more than twice as broad as they are deep; 

 i)th pair likewise unusually broad, and narrow elliptical in form. Eyes 

 replaced by 2 small patches of a whitish pigment, only visible in the 

 living animal, and situated each within the lateral walls of the cephalon 

 near their anterior edges. Superior antennae in female very slender and 

 about attaining half the length of the body, 2nd joint of the peduncle 

 extremely elongated and narrow, nearly twice as long as the first, and fringed 

 on both edges with a row of slender setae, iiagellum very small, scarcely 

 twice as long as the last peduncular joint, and composed of about 11 short 

 articulations; flagellum of the (young) male somewhat larger, 3 times as long 

 as the last joint of the peduncle, and having some of the joints thickened. 

 Inferior antennae in female much shorter than the siiperior, the 2 outer joints of 

 the peduncle of nearly eqiial length, and edged with slender setae, flagellum about 

 the length of those joints combined; flagellum of the (young) irale consider- 

 ably more elongated and divided into a great number of short articulations. 

 Anterior gnathopoda with the propodos oblong oval in form, and somewhat 

 shorter than the carpus, palm slightly curved and longer than the hind 

 margin, carpal lobe triangular, pointing inferiorly. Po.-sterior gnathopoda 

 somewhat more slender than the anterior ones, propodos nearly as long as 

 the carpus and of a form similar to that of the anterior pair, carpal lobe very 

 narrow, pointing anteriorly, and reaching beyond the hind margin of the 

 propodos. The 2 anterior pairs of pereiopoda rather strong, with the meral 

 joint very large, fully as long as the basal one, and fringed along the 

 anterior edge with a dense row of delicate ciliated setae, along the posterior 

 edge with dense tufts of bristles, propodal and carpal joints about of equal 

 length, dactylus shorter than the propodal joint and compressed, foliaceous. 

 The 2 succeeding pairs with the basal joint rather large and expanded, meral 

 joint of usual appeai'ance, dactylus of same structure as in the 2 anterior 

 pairs, but somewhat more elongated. Last pair of pereiopoda considerably 

 exceeding half the length of the body, basal joint large, elongated obpj'ri- 

 form in outline, carpal joint much shorter than the propodal one, and scarcely 

 attaining the length of the meral joint. The 2 anterior pairs of uropoda 



