76 THE VOYAGE OF H.M.S. CHALLENGEE. 



General Description. — The Challenger collection contains one female specimen from 

 Honolulu of this species, which has previously been represented by the single specimen 

 which was obtained by the "Herald" from Matuku, Fiji Islands. It may be dis- 

 tinguished without difficulty from all other known Stomatopods, except A. Milne- 

 Edward's Squilla hradij ', by the long spines which cover the telson and sixth abdominal 

 segment, and from this species by the length of the median spine of the rostrum, and 

 the absence of sjDines on the inner edge of the dactyle of the raptorial claw. 



Transverse diameter of rostrum about equal to its length ; antero-lateral spines of 

 rostrum acute, but very slightly produced forwards, and shorter than the median spine, 

 which ends in an acute point opposite the middle of the eye. The carapace is nearly 

 square, as long as wide, slightly narrowed anteriorly, and with antero- and postero- 

 lateral angles rounded and alike. The gastric area is slightly, convex ' and its lateral 

 sutures are sharply defined, while the transverse cervical suture is almost obsolete. 

 Carapace wider than thoracic region, and about as wide as the abdomen. First thoracic 

 somite exposed and subacute at lateral edges. Third, fourth, and fifth thoracic somites 

 so articulated as to form a convex dorsal protuberance. Lateral edges of third and 

 fourth obliquely truncated converging posteriorly, with rounded angles. Lateral edges 

 of fifth subacute. The abdomen increases slightly in width from in front backwards, 

 but not so rapidly as in White's figure. The abdominal somites have faintly marked 

 marginal carinse or ridges, and the first four have on each side, at about one-third of the 

 distance from the lateral edge to the middle line, a small sharply defined indentation. 

 The sixth abdominal somite is immovably united to the fifth as well as to the telson, 

 although the sutures are distinctly visible. The first four abdominal somites are smooth 

 dorsaUy, as is "also the anterior half of the fifth, a transverse line separating it from the 

 posterior half, which is armed by about six transverse rows of numerous short spines, 

 which increase in length and in the definiteness of the transverse rows as they approach 

 the posterior margin of the somite. The dorsal surface of the sixth abdominal somite is 

 armed with very numerous (about fifty-six) long cylindi-ical sj^ines, each of which ends 

 in a blunt rounded tij) with a perforation from which a soft tubular fleshy jjrocess 

 protrudes. Eight of these spines are arranged in a transverse line along the posterior border 

 of the somite, and are arranged symmetrically in pairs with reference to the middle line, 

 about twenty more form an anterior transverse band which, starting at the postero- 

 lateral angle, runs obliquely forwards to the anterior edge of the somite, along which it is 

 continued across the middle line. The triangular antero-lateral area, external to this 

 line, is occupied by about fourteen crowded spines on each side. 



The suture between this somite and the telson is distinct, but immovable, and 

 bordered by a raised ridge. 



The central area of the telson is occupied by twenty-two similar long spines, with 

 fleshy appendages, symmetrically arranged with reference to the middle line, and so 



