THE SPECIES OF AEGLA — SCHMITT 



465 



a noticeable lobe at base, blunt angled in the largest specimens (and 

 in the type) but usually sharp angled and anteriorly spined at least 

 in specimens up to 33 mm. in length of carapace and rostrum taken 

 together. Upper margin of palms somewhat compressed, forming a 

 low ridge (palmar crest), most developed at its posterior angle, or 

 "heel"; margin of crest more or less irregular, angulations aiTned 

 with small, sharp, corneous spines or spinules, sometimes corneous 



Figure 45. — Aegla platensis, new species, male holotype: a, Dorsal view; b, lateral view of 

 anterior portion; c, sternuna of third and fourth thoracic somites; d, inner ventral margin 

 of ischium of left cheliped; e, lateral view of second abdominal epimeron. a, b, natural 

 size; c~e, twice natural size. 



spinulate at anterior angle, border of posterior angle,, or heel, some- 

 what upturned, forming a very slight, short, very shallow trough 

 between border of "heel" and margin of palm proper. In young 

 specimens the margins of the crest may be quite spiny, but this 

 condition is not carried over into the more developed, adult stages. 



Ridge of carpus of cheliped above inner spined margin somewhat 

 lumpy and obliquely scabrous ridged, but not spined ; anterior inter- 

 nal lobe or angle of carpus produced into a short, stout, conical spine. 

 Upper longitudinal margin of merus with a strong, moderately stout 

 to slender spine at anterior end ; anterior margin with only a slight. 



