THE SPECIES OF AEGLA — SCHMITT 489 



the carpal ridge there may be, also in the larger specimens of the 

 species, an acute little tubercle armed apically with two or three 

 sharp, dark-colored corneous scales. Inner margin of ventral sur- 

 face of ischium armed with four more or less subequal, at times more 

 or less equispaced, low, but definite and well-formed, conical tubercles 

 or spines with subacute to acute corneous tips, the anteriormost the 

 largest, the most posterior second in size, the anterior of the two in 

 between the first two named, third, and the posterior fourth in size 

 (this describes the margin of the left ischium of the neotype; the 

 right is armed like the left except that the two spines in the inter- 

 space between the anterior and posterior spines are just about equal 

 in size and placed quite close together in the middle of the inter- 

 space) ; in the specimen next in size (25 mm.) the anterior spine is 

 quite appreciably larger than any of the others on this margin of 

 the ischium. 



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

 apparent first) abdominal somite broadly rounded off, not spined. 



Neotype. — The largest male I have seen (U.S.N.M. No. 80022), 

 28 mm. in length of carapace and rostrum, was collected by Dr. 

 Carlos Moreira in 1904 in Santa Catharina, Brazil, and later gen- 

 erously presented by him to the United States National Museum, 



Remarks. — More intuitively than he realized, Fritz Miiller (1876) 

 exclaimed, when his first specimen of Aegla odebrechtii came to 

 hand, "How is it that we find this Pacific crustacean [from the west- 

 ern slopes of the Andes] in our mountains [here on the Atlantic coast 

 of Brazil] ?" So far as he knew at that time, no representative of the 

 genus had been discovered outside of Chile, and, in spite of the wide 

 distribution of the Aeglas here described, his species is the one east 

 South x^merican form that seems most to resemble those inhabiting 

 the slopes of the Andes. 



Distribution. — Aside from the neotype, I have seen just 8 other 

 specimens, 6 males, of which the largest measured 25 mm. in length 

 of carapace and rostrum, the next in size 14, and the smallest 

 131^ mm., and 2 females of 15 and 14 mm., respectively. These speci- 

 mens were kindly obtained for me by Dr. Carlos Moreira through the 

 kind offices of his good friend Dr. G. Kuhlmann, Blumenau, Santa 

 Catharina, Brazil. I am very grateful to both of these estimable 

 gentlemen for their interest and help in this matter. 



An additional, quite typical male belonging to the Academy of 

 Natural Sciences of Philadelphia (no. 484, pt.), 26 mm. long, cara- 

 pace including rostrmn, and labeled "du Bresil. Donni par M. M. 

 Derreaux," has lately come to my attention. It has the characteristic 

 "inserted" spine easily observable in the neotype (fig. 55, a, and pi. 

 27, A) ; the ventral inner margin of the ischium of the right cheliped 

 is likewise armed as in this figured specimen. 



