CRUSTACEA OF ALABAMA. 31 



In this species there is an aureole-like lucid zone about the anterior of the shell and 

 a similar, but triangular appendage behind. 



This species may be regarded as forming a transition to Cypris proper, as the form 

 if not the size of the stylets is more as in that genus. 



Cypridopsis vidua, Mueller (?) 



(Plate IV, Fig. 1.) 

 Cypris vidua, Herrick, Micr. Entomos. 



If not the species quoted, certainly very similar is a small, greenish species distrib- 

 uted throughout the Eastern United States. 



Shell ovoid, very tumid ; greatest height in the middle, anterior extremity much the 

 broader ; ventral margin gently sinuous. As viewed from above, broadly ovate, acutish 

 anteriorly and widest behind the middle. 



Length once and one-third the width. The shell is so broad as to make it hard to 

 secure a side view which is most readily obtained in other species, lateral diameter being 

 considerable greater than height. 



Shell nearly smooth, yellowish-green to pale, with three dark bands passing trans- 

 versely, covered with fine hairs and punctuate. Limbs robust. Anterior antennae seven- 

 jointed ; terminal and penult segments each with three (?) non-plumose very long setae, 

 third segment long, upper surface of first segment with two rather long setae. Claws of 

 the second antennae strong, serrate, setae of third segment longer than the claws. Sec- 

 ond foot with a terminal straight seta and a curved claw, also a sub-terminal claw. 

 Length 1.24 mm., height .80 mm., greatest width .88 mm., eye .22 from anterior, great- 

 est transverse diameter intersects longitudinal diameter .06, back of middle. Eastern 

 United States, rather common. 



Genus Candona. 



The animals of this genus resemble Notodromas in lacking the branchial .plate ot 

 the second maxillae, but differ from it and Cypris in lacking the setae of the second an- 

 tennae, while those of the antennae are short. Being destitute of natatory appendages, 

 these animals content themselves with creeping and forging about in the mud upon the 

 bottom. - No species is accurately known from America, though that described in an 

 early paper (Microscopic Entomostraca) as Candona ornata, seems to belong here and 

 should be recognized by the sculptured free margin of the shell as well as the peculiar 

 form. A 'Species like C. albicans also occurs. 



The following species are described by V. T. Chambers, which for the sake of col- 

 lating the American forms, are here admitted. 



