THE CANCROID CRABS OF AMERICA 267 



Adaea (Psaumis) maeandrina Kltjnzinger, Nova Acta, Abh. K. Leop. -Carol. 



Deutschen Akad. Naturforscher, vol. Ic, No. 2, 1912, p. 89 [185], pi. 1 [5], 



fig. 5o-56, pi. 6 [10], fig. 4 (type in Stuttgart Mus.). 

 Adaea vermiculata Odhner, Goteborg's K. Vet. Handl., Fjarde Foljden, vol. 29, 



No. 1, 1925, p. 57, pi. 4, fig. 1. 



Diagnosis. — Surface vermiculated ; vermiculations smootli, sliowing 

 boundaries between granules; elongate furrows replacing most 

 punctae; cardiac elevation crossed by two long transverse furrows; 

 all mesogastric punctae median. 



Description. — In some respects intermediate between erosus and 

 labyrinihicus; as for example, in convexity of carapace and of vermic- 

 ulations, and in distinctness of granulation. The raised surface is 

 composed entirely of granules crowded close together and smoothed 

 off so that the elevations present a glossy surface ornamented with 

 darker lines indicating boundaries of granules. Sutures between 

 larger divisions, as well as smaller ones, wide as in lahyrinthicus. 



The number of depressions in the vermiculations is fewer than in 

 either of the other species, partly due (1) to the confluence of two or 

 more depressions to form elongate ones as on 5 L and 2 M and most 

 noticeably on 1 P where there are two long transverse furrows, and 

 (2) to the opening of many of the small depressions into the furrows 

 bordering the islets instead of being entirely enclosed. 3 M. has only 

 three depressions, all median, against six (four in a transverse line, 

 two median) in lahyrinthicus and erosus. 



The connections of certain areoles are different in the three allied 

 species. The outer protogastric areole (2 IVI) is independent in 

 lalyrinthicus, continuous with the epigastric area in vermiculatus, 

 while in erosus it is free anteriorly but confluent posteriorly with the 

 mesogastric areole. 2 L and 3 L are united in vermiculatus and 

 erosus, separate in lahyrinthicus. 



Tubercles on outer surface of palm acutely pointed as in 

 lalyrinthicus but much more complex in their basal outlines. 



Color. — White, including the fingers in their whole length; ambu- 

 latory claws horn color (Klunzinger) . 



Measurements. — Female (7589), entire length of carapace 21.8, 

 width 32.6 mm. 



Range. — Curagao, South America; Angola, West Africa (Brito 

 Capello, Osorio). 



Material examined. — Curngao; February 10-18, 1884:] Alhatross; 1 

 female (7589). 



BemarTcs. — Brito Capello's figure shows the two elongate cardiac 

 furrows; on the other hand the areoles are represented much more 

 subdivided and the outer furrow on the ischium of the external 

 maxilliped much longer and more complete than in the Curagao 

 specimen here described. The American and African forms are 



h 



