REPORT ON THE STOMATOPODA. 41 



dactylus of raptorial claw. All the exposed somites of the hind body with lateral dorsal 

 cariniB but no submedian dorsal carinas on any of the exposed somites, except the 



w ' \ frr ; , ^'^'^'^"'^^'^^ «^ ^^^^^ ^dg*^ «f ''<^ond joint of raptorial limb undulating 

 ^^ idth of fifth abdominal somite equal to one-fourth of the total length Inner spine of 

 basal joint of uropod longer than the outer, with a rounded tooth on its outer edge and on 

 Its inner edge four or five acute teeth gradually increasing in size distally. Rostrum 

 wider than long. Dorsal surface of telson with numerous rounded tubercles on each side 

 of median ridge ; ventral surface smooth. 



Special Description.-Rostmm without a median ridge, a little longer than wide 

 subtriangular and nearly semicircular. Antero-lateral angles of carapace acute ; postero- 

 lateral angles broadly rounded, and prominent; anterior and posterior borders nearly 

 transverse. Carapace without a median carina, and with very faint lines indicating the 

 lateral carina; gastric area convex and prominent, with a strongly marked cervical 

 suture. Length of rostrum ^g Ja, and of the carapace f^a^, and of the two ^^^%^^ of the 

 total length. Exposed thoracic somites increasing gradually in width. Fii-st five 

 abdominal somites nearly equal in width, and about equal in width to one-fourth of the 

 total length. The width of the fifth is ^^ of the total length, and it is ^ as wide as 

 the second thoracic somite. There are no submedian dorsal carina on any of the exposed 

 somites of the hind body except the sixth abdominal. The first thoracic somite is 

 exposed, and, hke the second, has no dorsal carina; the third, fourth, and fifth have 

 each a pair of short lateral carina, and the first five abdominal somites have each three 

 pairs of lateral carinas, including the marginal ones, none of which, except those on the 

 sixth abdominal somite, end in spines. The sixth abdominal somite has well-developed 

 submedian, and two pairs of lateral carinas, aU six ending in spines. The first four 

 abdominal somites have each a small median tubercle, which can be detected with 

 difficulty with a lens. The telson has a convex median dorsal ridge, which ends behind 

 ma short acute spme, on each side of which there are numerous scattered rounded 

 tubercles, which obscurely exhibit an arrangement in rows. The ventral surface of the 

 telson IS smooth, and the posterior border ends in six pairs of acute spines, with a 

 tuberculated ridge over the base of each postero-median and postero-lateral ; a sinde 

 acute tooth between the lateral and postero-lateral ; six or seven acute teeth between 

 each postero-lateral and submedian, and three or four on each side between the 

 tip of the submedian and the deep notch which occupies the middle line. The 

 sixth abdominal appendage is long, and the paddle of the exopodite is oval, about as 

 long as the second joint ; the eqdopodite is long, narrow, and curved ; the basal 

 jomt carries an acute dorsal spine, and its ventral prolongation ends in a short acute 

 outer spme and a very much longer acute curved inner spine, which has a rounded 

 tooth on Its outer margin, and on its inner margin four or five acute curved teeth, which 

 mcrease in size distally. The rostrum reaches nearly to the base of the ocular somite, 



(ZOOL. CHALL. EXP.— PART XL V. — 1886.) y 6 



