180 Ilf'y — -New iSiihtry'rancaii Cri(Htii('eaii,s. 



and .serrate above and below. Antero-lateral margin of carapace with 

 two spines. First two pairs of ambulatory appendages sub-equal in size 

 and similar in form; chelate and with large bunches of pectinate bris- 

 tles on the distal extremities of the fingers. The articulation of the 

 hand with the carpal segment is at a point on the lower siarface of the 

 hand some distance from the proximal end; and the prominent knob- 

 like extremit}' fits, when the limb is fully extended, into a broad sinus 

 formed by the margin of a plate-like expansion of the carpus. 



Palaemonias ganteri sp. nov. 



Carapace about one third the total length, very thin and delicate. 

 Rostrum as long as the antennal scale, its upper surface with about 

 fovirteen small teeth, lower surface with two or three teeth. Eye stalks 

 rudimentary and without pigment. Antennules bi-tlagellate. Antenn;e 

 longer than the body. Color in alcohol white; in life nearly transparent. 

 Length about one inch and a quarter. 



Named for Mr. H. C. Ganter, the manager of the cave, who through 

 his deep interest in the scientific study of its fauna and flora was led to 

 afford me exceptional facilities for making my investigations. 



Caecidotea richardson^e sp. nov. 



Body slender but broader than in eitiier C. Ktygia or C. nirlaijdckeiisis. 

 Margins of the head, body segments and telson hairy. Antennules as 

 long as the peduncle of the antennae, the flagellum with fifteen seg- 

 ments. Antennae long and very slender, the flagellum with about sixty- 

 five segments. Legs much longer than in the other species of this 

 genus. Uropods of nearly uniform diameter throughout, slender, about 

 one half as long as the body and thickly beset with short stitf hairs. 



Color in life and in alcohol white. 



Named for Miss Harriet Richardson, whose papers on North Ameri- 

 can Isopods are well known. 



