438 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



is a little longer than the iifth. The epimera of the iirst three seg- 

 inentis are small and placed antero-lateralh\ 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 2i 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 tirst 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 inferioi* margin. 

 All the other legs are aml>nlatory. witli dactyli uni-unguiculate. 



C.(ECIDOTEA SMITHSII Ulrich. 



Csecidotea smWisii Ulrich, Trans. Am. ^Microscopical Soc, XXIII, 1902, p. 9o, 

 pi. xvr, figs. 10-18. 



Locality. — Subterranean stream near San Marcos, Texas; Artesian 

 well at San Marcos, Texas. 



"Body of loosel}' jointed segments. Head as in C. xtyf/Ja Packard, 



Fl(i. 496.— C.Bt'IDOTEA SMITHSII (AFTER ULRICH). a, BASAL SEG.MENT OF UPPER A.NTENNA, SHOWIXG 

 Al'llITORY .SPINES. h. MA.XII.I.A (?) (ACCORDING TO ULRICH). C, UPPER ANTENNA. (/, PORTION OF 



BODY, e, First leg. /, Portion of lowep. antenna, g, Ba.sai, portion of same. /(. Labri'.m. 

 /, Second leg. 



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

 as basal portion of outer antenna'. Flagollum of inner antenn.v con- 

 sists of live segments, the second one-fourth of Iirst, remaining ones 



