450 Illinois State Laboiutory of Natural History. 



1894. Candona acuminata, Turner (64, p. 19, PI. VIII., Fig. 34), 



1895. Candona acuminata, Turner (35, p. 299, PI. LXXI., Fig. 31). 



Length 1.00 mm., height .44 mm., width .36 mm. 



AlcohoHc specimens in the collection of the State Lab- 

 oratory of Natural History have the shell of a dirty 

 brownish color, thus differing from the specimens found 

 by Turner in Texas which were white (35, p. 300). 



Seen from the side, the shell is elongate, pointed both 

 posteriorly and anteriorly, the middle dorsal part much 

 arched, sloping abruptly posteriorly so that it is concave 

 for a short distance, then rising slightly to slope again 

 and form the narrow rounded posterior part. The slope 

 anteriorly is much more gradual, with a slight concave 

 depression. Ventral margin concave, the greatest depres- 

 sion being at the center. 



Seen from above, the shell is subelliptical, both ex- 

 tremities being bluntly pointed, widest at middle, and 

 narrowing gradually to both ends. 



Second antennae stout, terminal claws not pectinate; 

 terminal segment twice as long as wide. Spines of the 

 first maxillary process smooth. 



Feet of the first pair (Fig. 5) made up of long nar- 

 row segments, the terminal one conical and twice as 

 long as wide, the preceding one twice as long, the ante- 

 penultimate of the same length, and the one preceding 

 this as long as the last three combined ; terminal claw 

 not as long as the last three segments together, faintly 

 serrate near tip. 



Fourth segment of second foot (Fig. 6) divided, thus 

 making the foot six-segmented ; terminal segment as 

 wide as long, the shorter backwardly directed seta 

 three and a half to four times as long as the terminal 

 segment, the longer seta being just twice as long as the 

 shorter one. 



Caudal rami (Fig, 7) much broadened at base, where 

 the internal contents seem to be coagulated — a peculiar 

 appearance I have noticed in no other species of the 



