62 NEW-YORK FAUNA CRUSTACEA. 



ORDER VIII. LOPHYROPA. 



Head confounded with the anterior portion of the body. Eye or eyes sessile and compound. 

 Shield variable in form and size. Mandibles without palpi. No branchice near the 

 mouth. Feet variable in number, natatory, sometimes simple or branched, occasionally 

 lamellar and furnished with hairs. 



(EXTRALIMITAL) 



Genus Cyclops, Muller. Body elongated, narrowed behind, divided into transverse segments,, of which 

 the first is largest. Tail ending in two setaceous points. Antenna? two to four, simple. A 

 single eye on the back of the first segment. Feet six to twelve, hairy. 

 C. navicularis. (Say, op. cit. Vol. 1, p. 441.) Body oval, truncate behind. Tail as long as the thorax ; 

 terminal joint bifid, with four setae, and two small equal spines at the base of each pair of seta. An- 

 terior antennae two-thirds the length of the body. Color, sanguineous ; tail and feet white. Stag- 

 nant fresh water. Southern States. 



Obs. Closely allied to this is a minute crustacean, found abundantly in deep water in Lake On- 

 tario. I am indebted to my friend Dr. Charles Pickering for the following notes on this animal. 



Genus Scopiphora, Pickering. Body small. Eye single, near the anterior margin of the shield. 



Antennae large, and as long as in the preceding genus, and has the same motions in the water. 



Abdomen terminating in two styles, each with three setae ; a brush under the last or last three 



joints. Ovaries none. Legs spiny. 

 S. vagans. (Pickering, MSS.) 



