516 



FEPOET OX THE OBBEB STOMATOPODA—BTGELOJV. 



spines of the fifth thoracic segment narrow, straight, and. acute, the 

 lateral processes of the next two segments broadly rounded and. pro- 

 duced into spines that point backward; eight carinfe on the abdominal 

 segmeuts; telson with a crest and a keel and a series of curved lines 

 of pits on each side, six marginal spines, the submedian pair with 

 movable tips;, no submedian denticles, ten to eleven small intermediate 

 ones, and one lateral one. 



General description. — The carapace is twice as wide behind as it is 

 in front. The exposed i)art of thorax is as long as the carapace; and 

 the abdomen, leaving out the telson, is twice as long. The abdomen is 

 about the same width for its whole length. The telson is about as 

 long as wide. 



The rostrum is triangular, a little wider than long. The apex is 

 blunt and rounded. In one specimen the apical margin is indented so 



Fiff. 9. 



TELSON AND UROPODS OF SQUILLA ARMATA. 



Twire natural sire. 



h. — Basnl proloncation of iiropoil. 



im., I. — Intermediate and lateral marginal spine."*. 



sc, ic, Ic, cm.— Submedian, intermediate, lateral, and marsinafc 



as to have four short teeth. The median and marginal carina are 

 obsolete or entirely absent, and the dorsal surface is smooth except for 

 a slight roughness in old specimens. 



The carapace has generally a smooth, polished appearance. There is 

 a well-marked transverse suture, but it makes only a slight depression 

 across the median line. The posterior lateral lobes are evenly rounded, 

 not angled. 



The exposed thoracic segments possess submedian and intermediate 

 cariuiiB. The fifth segment has a pair of short and acute ventral spines 

 and a pair of much longer lateral processes that are straight, evenly 

 tapering, and sharply acute. 



On the lateral margins of the next two segments there is no trace of 

 an anterior lobe. The marginal process is evenly rounded to the 



