60 ARACHNIDES OF THE 



inserted on a common tubercle, upon the top of the 

 head ; mandibles robust, didactyle, inserted at the 

 extremity of the head, porected, parallel, two-jointed, 

 longer than the rostrum, first joint elongated attain- 

 ing the tip of th J rostrum ; hand abruptly inflected 

 upon the tip of the rostrum ; rostrum porected, cylin- 

 drical, truncated at tip, shorter than the body, and 

 inserted beneath the first segment : palpi none ; feet 

 eight, filiform elongated, slender; coxte three jointed, 

 the middle one longest ; thighs one-jointed ; tibial 

 two-jointed; tarsi two-jointed, the first very short: 

 nails single, arcuated, capable of being inflected. 



Species. — A. ^pallida. Body whitish ; ocular tu- 

 bercle acute at tip ; eyes sanguineous ; hands suboval, 

 slightly hairy, not dilated, inflected vertically, and 

 with the fingers, hardly more than two thirds the 

 length of the preceding joint ; forgers arcuated, 

 crosssing each other near the tip ; a small, rather 

 acute tubercle at the base of the anterior feet (proba- 

 bly the rudiment of the egg-bearing organ ;) coxot 

 second joint clavate ; tibial first joint rather shorter 

 than v tbe second. 



Length of the body 1-4 of an inch. 

 x Span of the feet 1 1-2 inch. 



Inhabits the coast of South Carolina. 



Cabinet of the Academy. 



Of this new genus I found two specimens in the 

 bay of Charleston, S. C. upon the branches of the 

 Gorgonia virgulata, and as they have not the egg- 

 bearing organs, I suppose them to be males. This 



