10 ACADEMY OF NATURAL SCIENCES 



elongated attaining the tip of the rostrum ; hand abruptly inflect- 

 ed upon the tip of the rostrum : rostrum porrected, cylindrical, 

 truncated at tip, shorter than the body, and inserted beneath the 

 first segment ; palpi none ; feet eight, filiform elongated, slender : 

 coxae three-jointed, the middle one longest: thighs one-jointed; 

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

 single, arcuated, capable of being inflected. 



A. PALLIDA. — Body whitish : ocular tubercle acute at tip ; 

 eyes sanguineous; hands suboval, slightly hairy, not dilated, in- 

 flected vertically, and with the fingers, hardly more than two-thirds 

 the length of the preceding joint ; fingers arcuated, crossing each 

 other near the tip ; a small, rather acute tubercle at the base of 

 the anterior feet (probably the rudiment of the egg-bearing organ ;) 

 coxae second joint clavate ; tibiae first joint rather shorter than 

 the second. 



Length of the body one fourth of an inch. 



Span of the feet one and one half an inch. 



Inhabits the coast of South Carolina. 



Cabinet of the Academy. 



Of this new genus I found two specimens in the bay of Charles- 

 ton, S. C., upon the branches of the Gorgonia vtrgulata, and as 

 they have not the egg-bearing organs, I suppose them to be males. 

 This [61] animal resembles PJioxicMlus in being destitute of palpi, 

 but difi'ers from it in having didactyle mandibles and simple nails. 

 In the form of the mandibles it resembles Nymphon and Am- 

 mothoea but the want of palpi distinguishes it from those genera, 

 its proper situation is probably next to the genus Phoxichilus. It 

 unquestionably, is generically the same with Phalangium aculea- 

 ?Mm of Montague, (Trans. Lin. Soc. vol. 9, tab. 5,) which Dr. 

 Leach, in the article Crustaceology of Brewster's Encyclopcedia, 

 refers to the genus Nymplion, but which, as far as I can discover, 

 he has omitted in his subsequent works. It will of course b.e a 

 second species of this new genus. 



Order 11. POLYMEROSOMATA. 



Family 2. SCORPIONIDEuE.. 

 Genus BUTHUS Leach. Scorpio Latr. 

 Palpi brachiform, didactyle; eyes eight; abdomen terminated 

 by a caudal process of six articulations, of which the terminal one 

 is armed with a venomous aculeus. 



[Vol. II. 



