PACKARD.] PHYLLOPODS OF NORTH AMERICA. 301 
as in L. gouldii; the filiform lower end (PI. I, Fig. 4, br.) is much shorter 
than in L. gouldii, and endites 4-6 are also much shorter; while the 
coxal lobe is large and very long. 
End of the body blunt, squarely docked, the point blunter than in Z. 
gouldti, and ending in a slender spine. Two dorsal terminal filaments, 
much as in L. gouldii. 
Length of carapace, or shell, 4™™; breadth, 3™™. Forty-four females, 
nearly all with eggs, occurred with Lepidurus couesii, in pools on the 
west bank of Frenchman’s River, Montana, 49° N. (Dr. Coues.) It also 
occurred in large numbers associated with Limnetis brevifrons in pools at 
Ellis, Kans., collected by Dr. L. Watson June 29, 1874. The specimens 
were females with eggs, and as a rule were triangular in outline, com- 
pressed, only one or two of the Montana examples being so much com- 
pressed. The species is easily recognized by the mucronate, tridentate 
front, the short, thick hand and claw, by the number of antennal joints, 
and the long, narrow flabellum, the short endites 4-6, and by the long, 
stout, jaw-like coxal lobes. 
LIMNETIS BREVIFRONS Packard. 
Plate XXVII, figs. 1-3. 
Timnelis brevifrons Packard. Bulletin of Hayden’s U. S. Geol. and Geogr. Surv., iii, 
No. 1, 172, April 9, 1877. 
Many females. Carapace decidedly triangular in outline, more so 
than in DL. gouldii, while it differs very decidedly in this respect. from 
gracilicornis, and is considerably larger than gracili- 
cornis or mucronatus, and is flatter than both. Front 
shorter and broader than usual; less contracted in 
width at the base of the antenne than usual. The 
frontal carina is high, especially a little in front of the 
Fic. 3.—Front of Fic. 4.—Limnetis brenifrons, female, much enlarged. Burgess del. 
head of Lymnetis i a A Ono 6 
spp.—4, L.mucro- @Y@S. Compared with that of Lymnetis gracilicornis 
cilicorn is; cp, (Mig. 3, b, in text) it is much broader, shorter, the 
ee keel reaching to the end, which is squarely docked, 
. VW. . . 
i the end being a flattened triangle; the end of the 
front reaches to the middle of the antenn, while in L. gracilicornis the 
end reaches two-thirds of their length. It differs from Z. gouldti (Fig. 
