382 The American Geologist. June, 1891 
author also states Marsh's claim that the teeth of P. laticeps Msh. have 
the same structure as Leidy's P. paludosus is incorrect; the molar of 
the one approaches Telmatofherium Msh., the other P. paludosus Leidy. 
Lewroeephalus S. & O. becomes a synonym of Telmatoiherium Msh which 
is retained. Each species is then taken up and described in a compre- 
hensive manner. Palceosyops minor, sp. nov. in which " second superior 
premolar with two external lobes; external lobes of last superior pre- 
molar equal. Intermediate conules of true molars reduced, a strong 
external cingulum present." Limnohyops Msh embraces PalCBOsyops as- 
employed by Marsh', Limnohyus as employed by Leidy and others. 
Limnohyops laticeps Msh., syn. with P. laticeps and Limnohysus laticeps 
of Leidy. Palceosyops megarhinus Earle (Am. Nat. Jan. 1891, 45): "No 
diastema in superior dental series, canines very small and wide-spread- 
ing, superior true molars without external cingulum; distal extremity 
of nasal expanded." 
Age of the Peace Creek Beds, Florida. Mr. W. H. Dall (Proc. Acad. 
Natl. Sci., Feb, 17th, 1891), calls these beds, fromVhich a considerable 
number of mammalian fossils have recently been extracted, "Older 
Pliocene." 
Basanite from the Wyandotte Cave. E. Goldsmith gives an analysis- 
of basanite from Wyandotte cave, Crawford, Co., Ind.: Si0 2 , 93.66; 
Al 2 3 +Fe 2 3 , 3.10; H 2 0, 1.34; C, 0.28; CI, Trace; Sp gr., 2.605. 
Proc. Acad. Natl, Set., Phila., 1891, p. 99. 
Dictionary of fossils. — By J. P. Lesley. (Geological Survey of Penn- 
sylvania, P4, vol. ii, N-R, 1888, and P4, vol. iii, S-Z, 1890. 
These two volumes are a great improvement over the first volume 
which contained no less than thirty pages of errata. Vol. ii contains 
ten and vol. iii, thirteen pages of errata. The labor involved in the 
production of this work cannot be overestimated, and while the diction- 
ary is intended for the use of citizens of the state of Pennsylvania, it 
will undoubtedly prove more useful to the palaeontologist, being, as it 
is. an alphabetical synopsis of the entire Palaeozoic system in Pennsyl- 
vania and adjacent states. The work throughout is abundantly sup- 
plied with illustrations and it is to be regretted that they are not of 
better quality, but, however, it is understood that the appropriation by 
the state would not admit of better ones. 
Contributions to Invertebrate Palaeontology. R. P. Whitfield. (An- 
nals N. Y., Acad. Sci. 5, Dec. 1890, pp. 505-622.) 
Under this title Mr. Whitfield gives a very interesting description of 
a large number of species from the various horizons of the Palaeozoic. 
Under "Fossils of the Erie Shales" is described a new species of Ento- 
mostraca Aristozoe canadensis, whose carapace is one and one-half 
inches long and one inch high. This, however, is not from Ohio, hav- 
ing come, it is said, from the Trenton of Canada. Twelve well-executed 
plates illustrate the paper. 
