460 PROCEEDIjSTGS of the national museum vol.91 



outer margin (of both hands) with a number of spinuliform scales, 

 or sharply pointed, short spines. Movable finger with no true lobe 

 on outer margin near base, at best a low, scabrous thickening, but 

 so slightly developed that it in no sense can be considered a lobe 

 such as is found in certain other species of Aegla; both fingers with 

 a stout lobular tooth. Palmar crest a comparatively low ridge, 

 broadly serrate, angles of serrations sharp-spined ; sometimes (fig. 43) 

 serrations are virtually obliterated so that free edge of crest is nearly 

 straight, and furnished with some corneous, perhaps pointed, scales 

 and a fair-sized spinule anteriorly and posteriorly. 



Carpus sharply and strongly spined on inner margin, ridge above 

 this row of spines also sharply and strongly spined ; apparently there 

 is an additional longitudinal row of spines running along the median 

 line of the dorsal surface of the carpus; this normally seems to be 

 armed with three good spines, sometimes one or both of the posterior 

 spines may be reduced to a stout scale, or a short-conical spinule. 

 Dorsal longitudinal margin of merus of cheliped armed with a row 

 of large, sharp, well-developed spines; at middle of anterior margin 

 of merus a strong spine about as large as anterior spine of dorsal 

 longitudinal margin. The inner margin of the ventral surface of 

 the ischium of the cheliped is armed with at least two fairly long, 

 strong, more or less subequal corneous-tipped spines; among the 

 Aeglas two ischial spines of this size and prominence are found only 

 in this species and A. sanlorenzo (see also last paragraph under 

 "Kemarks," A. castro, p. 475). 



Meri of ambulatory legs likewise normally armed with a series of 

 strong spines along upper margin; sometimes the series is not quite 

 so large and regular as in the type, yet enough of it is present 

 to distinguish this species from all other Aeglas by this feature alone ; 

 near distal end of posterior margin of ventral surface of merus, at 

 the level of the posterior end of the articular membrane of the joint, 

 there is a strong spine, behind this there may be a second smaller 

 one, and at the extreme anterior end a small spine or two. 



Anterior dorsal angle of epimeron of second (in lateral view, ap- 

 parent first) abdominal somite produced into a long, sharp spine 

 strongly buttressed behind by a conspicuous ridge or angle running 

 obliquely longitudinally back on the epimeron; anterior margin be- 

 low this spine deeply concave, ventral angle narrowly produced, sub- 

 acute and often, as in the type, tipped by a strong corneous spine. 

 Color. — A. parana is very beautifully marked. The general body 

 or ground color is a dark, almost black, bottle green ; in one instance 

 a dark grass green with faint suggestions or touches of parrot green ; 

 sometimes bister X olive-green to a blackish bister with raw-umber 

 higher portions. 



