438 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



is a little longer than the fifth. The epimera of the tirst three seg- 

 ments are small and placed antero-laterally. That of the fourth seg- 

 ment is also small and is placed about the middle of the lateral margin. 

 Those of the last three segments are small and post-laterally placed. 



The abdomen is composed of three segments, two short segments 

 anterior to the terminal segment. The terminal segment is 2 mm. 

 long and 2 mm. wide. Its posterior margin is straight, with the post- 

 lateral angles rounded. The peduncle or basal article of the uropoda 

 is 2 mm. long, or as long as the terminal segment of the abdomen. 

 The inner branch is 2 mm. long and is twice as long as the outer 

 branch. 



The first pair of legs are subchelate. The propodus is armed on 

 the inferior margin with about four long spines. The dactylus is 

 armed with a row of about eleven spines along the inferior margin. 

 All the other legs are ambulatory, with dactyli uni-unguiculate. 



CjECIDOTEA SMITHSII Ulrich. 



Csecidotea smithsii ULRICH, Trans. Am. Microscopical Soc., XXIII, 1902, p. 93, 

 pi. xvi, figs. 10-18. 



Locality. Subterranean stream near San Marcos, Texas; Artesian 

 well at San Marcos, Texas. 



"Body of loosely jointed segments. Head as in C. stygia Packard. 



FIG. 4%. C.HCIDOTEA SMITHSII (AFTER ULRICH). d, BASAL SEGMENT OF UPPER ANTENNA, SHOWING 

 AUDITORY SPINES. 6, MAXILLA (?) (ACCORDING TO ULRICH). C, UPPER ANTENNA. (/, PORTION OF 



BODY, e, FIRST LEG. /, PORTION OF LOWER ANTENNA, g, BASAL PORTION OF SAME. A, LABRUM. 

 i, SECOND LEG. 



No trace of eyes. Inner antennae short, not more than half as long 

 as basal portion of outer antenna?. Flagellum of inner antennae con- 

 sists of five segments, the second one-fourth of first, remaining ones 



