482 THREE NEW SPECIE:^ [December, 



Bituminous JVood. 



This substance is sometimes found in the mari of 

 Newjersey. Some specimens have been brought from 

 Woodbury, black, and of a perfectly ligneous texture. 

 It burns rapidly, and gives out a strong, disagreeable 

 smell. It occurs also at Croswicks creek. 

 *. * 



I beg leave to add, that there are several minerals 



found lately in this viciuity, the characters of which are 

 not sufficiently determined to be admitted into this paper. 



Description of three new Species of the Genus Nasa. 

 By Thomas Say. 



[The following portion of the Account ff the Cruatacea of the 

 U'lited States^ was mislaid, so that il conid not appear in its proper 

 place; it oiujht to have succeeded the genus Sphceroraa, in the pa- 

 per alluded to.] 



Genus NiESA. Leach, 



Tail, ultimate segment largest, furnished on each side 

 with a simple, pedunculated, subrectilinear, appendice; 

 antenncd subequal, from'twelve to twenty -jointed, superi- 

 orcs with an ample biarticulated peduncle, the basal joint 

 larger; space between the antennae obvious, but not am- 

 ple, base not concealed by the clypeus; nails bifid. 



SPECIES. 



1. N. caudata*. Ultimate secernent of the tail, tuber- 



