PACKARD.] PHYLLOPOD CRUSTACEA OF NORTH AMERICA. 619 



than usual to the anterior edge ; 18 lines of growth, with very fine granu- 

 lations between them. Length, 0.45 inch. California. 



E. ClarMi, Pack. (Sixth Eep. Peab. Acad. So., 1874), (Fig. 7).— 

 Shell oblong-oval, thin, about two-thirds as broad as long, with the 

 umbones rather prominent, oblique, situated on the anterior fourth of 

 the shell. About 20 lines of growth. Unusually fine microscopic punc- 

 tures between the lines. Length, 0.45 inch. Male shell narrower, and 

 with rather more prominent umbones than in the female. Animal with 14 

 joints in antennal flagella; each joint along the middle with 6 or 7 spines 

 above, and 3 or 4 stout hairs beneath ; 22 pairs of swimming- feet ; tel- 

 son with 20 pairs of unequal spines; claws of male long and mnch 

 curved ; telson larger than in the other sex. Ohio, Kentucky, Kansas. 

 May and later. Differs from JEJ. Caldtcelli in the flatter shell, and smaller 

 umbones, while the interstices between the lines are much less coarsely 

 punctate. 



U. Caldicelli, Baird (Proc. Zool. Soc. London, 1862, p. 148). — Umbones 

 situated almost in the middle third of the shell, broad, and directed a 

 good deal anteriorly ; shell very globose ; lines of growth numerous, 

 thickly punctnred between them ; 0.40 inch. Lake Winnepeg, Grube. 



U. Morsei, Pack. (Amer. Journ. Sc, 1871). — Shell intermediate in 

 form between JS. Cahhvelli and U. DunJceri, Baird, from Zimapan, Mexico. 

 Much swollen ; oblong-oval, pale horn-color, umbones large, promi- 

 nent, larger than in JE. CaldtvelU, much less obliqne, and situated near 

 the anterior end of the shell. Dorsal margin shorter than in E. Cald- 

 welli, and in front of the umbones, instead of being straight and sud- 

 denly curved downward, is regularly rounded, as in H. Dunlceri. Punc- 

 tures between the lines of growth on an .average, in the middle of the 

 shell, from 5 to iO in number. Length, 0.50 inch. Six specimens from 

 " Grindstone Creek, half-way from Fort Pierre to the Bad Lands," 

 Dakota. Collected by Dr. Haydeu (Mns. Chicago Acad. Sc), — Iowa. 



E. Belfragei, Pack (Amer. Journ. Sc, 1871)"^^ (Fig. 8).— Shell thick, 

 very globose, with the umbones prominent, situated at the anterior 

 third of the shell; dorsal edge straight behind the umbones, bent rather 

 suddenly downward at two-thirds of the distance from the umbones to 

 the posterior end, the end being full and rounded, 22 lines of growth, 

 between which the shell is coarsely punctuate, from 5 to 8 dots (when 

 placed in a straight line) between the lines. Length, 0.80 inch ; flagella 

 with 16 joints; 15 pairs of spines on the telson. Texas. 



E. Jonesii, Baird (Proc. Zool. Soc. London, 1862, p. 147). — A number 

 of individuals of this species, which do not difl'er from specimens from 

 Cuba, received from Dr. "von Martens, of the Berlin museum, belong- 

 to the Chicago Academy, and are marked in Dr. Stimpsou's handwriting 

 "Locality lost." As no other speciuiens from the West Indies occur in 

 the collection received froiu Dr. Stimpson, it indicates that E. Jonesii 

 may possibly occur in the Southern States or Central America. The only 

 habitat as yet known is Cuba. 



Family 2, Apodidje. — Of large size, with a rounded carapace, partially 

 covering the base of the abdomen, which is elongated, and ends in two 

 long, many-jointed, caudal filaments. About 60 pairs of swimming- 

 feet. Antennse rudimentary. First maxillipeds antenniform. 



Lepidurtis — Body much shorter than in A])us. First maxillipeds 

 shorter, and a long, spatulate, keeled telson, projecting out beyond the 

 insertion of the caudal filaments, 



L. glacialis, Kroyer (Fig. 9, enlarged). — A dark-greenish species, 

 "which differs from L. productiis, Leacli, in the distance from the front 

 edge of the carapace to base of hyijostoma being nearly one-half less than 



