510 PROCEEDINGS OF THE NATIONAL MUSEUM tol. 91 



AEG LA ABTAO Schmitt 



FiGUBE 63 ; Plate 28, F, G 



Aeglea abtao Schmitt, Rev. Chilena Nat, vol. 44 (1940), p. 30, pi. 5, fig. 2, 

 1942. 



Descriptimi. — A species of moderate size, attaining a length of 

 carapace and rostrum together of at least 26 mm. 



Carapace moderately convex. Rostrum elongate-triangular, but 

 not particuaiiy long, exceeding eyestalks by less than the length of 

 the cornea, sometimes by no more than half the length of the cornea, 

 fairly straight, not anteriorly reflexed, sharply triangular, trans- 

 versely flattened and only moderately troughed or excavate either 

 side of the median carina. Crest of rostral carina almost fades out 

 near the distal end of the rostrum, which is scaled much as in A. 

 concepcionensis ; the carina behind the level of the posterior margins 

 of the orbits furnished with two rows of corneous scales set fairly 

 close together; a little anterior to the orbital margin the two rows 

 become somewhat intermingled and even imbricated, so much so in 

 part that in the anterior half of the free portion they form what may 

 be described as an irregular single row of scales; in distal third of 

 free portion this row, like the carina itself, tends to fade out, only 

 suggested by a few scattered scales ; raised portion of carina becomes 

 broader and blunter posteriorly, extending backward about to the 

 anterior margin of the protogastric lobes. Epigastric prominences 

 low and blunt; anterior margins of protogastric lobes not particu- 

 larly set off from the rest of the carapace, but nevertheless well 

 marked by a row of thick, closely set corneous scales much larger 

 than the tiny scales seated in most of the punctae of the anterior 

 portion of the carapace. Areola moderately broad. 



Orbits fairly shallow, orbital sinus set off from the distinct and 

 well formed though small extraorbital sinus by a not large but well- 

 developed orbital spine. 



Anterior extremity of relatively small anterolateral spine scarcely 

 falling short of, or scarcely reaching, the posterior margin of the 

 cornea; anterolateral lobes of carapace not particularly flattened; 

 the anterolateral spines of this species are among the most reduced 

 in size of any species of Aegla. First hepatic lobe like rest of lateral 

 margin of anterior portion of carapace minutely spinulated, a 

 slightly larger corneous spinule tips the subacute anterolateral angle 

 of this lobe; second and third lobes indicated by slight notchings of 

 the lateral margin. 



Larger hand of good size, swollen, no low ridge as in A. concep- 

 cionensis apparent. There is an evident, though reduced lobe on the 

 outer margin of the movable finger near its base; anteriorly the lobe 

 is small spined. Palmar crest well formed but not high, sharply 



