THE SPECIES OF AEGLA — SCHMITT 505 



the length of the cornea; in lateral view the rostrum inclines down- 

 ward, although the distal extremity is again lightly but definitely 

 recurved ; rostral carina very blunt, often somewhat lumpy and some- 

 times a bit twisted looking, with an irregular row or two of, at most, 

 microscopically cornified punctae ; otherwise, the carina is in general 

 quite smooth appearing; distall}'^ the carina tends to fade out or 

 disappear, inasmuch as it becomes indistinguishably merged with the 

 thickened distal, recurved portion of the rostrum which may take in 

 as much as or sometimes even slightly more than the distal third of 

 the free portion of the rostrum ; either side of the carina, the dorsal 

 surface of the rostrum is lightly troughed or excavate; at about the 



\^ 



Figure 6\.—Aegla laevis (Latreille), male neotype: a, Dorsal view; b, lateral view of anterior 

 portion; c, sternum of third and fourth thoracic som.ites; 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. 



level of the posterior margin of the orbits the rostral carina attains 

 its greatest elevation, posteriorly it merges in the general surface 

 of the carapace before reaching the level of the anterior margins of 

 the protogastric lobes. The rostrum of this species is more or less 

 amorphous-looking, much as if in the course of the formative processes 

 it had congealed or become hardened before taking on a truly defini- 

 tive form. 



Protogastric lobes but poorly indicated; except for the gastric 

 region, anterior portion of the carapace is very coarsely and closely 

 punctate, the gastric region is smooth appearing, the punctae benig 

 small and relatively widely separated and in part obsolescent; anteri- 

 orly the line of demarcation between the two types of punctae defines 

 the anterior margins of the protogastric lobes, at which level the cara- 



