REVIEWS. 45 
allied to the Scorpions, and one whose affinity is doubtful. The species 
i a 
m, the hairs on the body being longitudinally striated, and, ac- 
To to Dr. Packard, RAMIS. those o odite 
E ANCESTRY OF INSECTS; FOSSIL INSECTS AND ENS ;IN Inurors.* 
rof Haeckel, of Jena, has been speculating as to the acis iim of the 
articulates. He considers the ancestral form of kr crustacea as a gm 
like itieatuPh; resembling the larval or zoéa-stag: the crab. As to the 
ancestor of the air-breathing, terrestrial ME (inseets, peal and 
eerie’); he propos es the eres that it was a zoéa which, Sone 
a 
ge of ula 
(including the ea Iasoni S; 5. eplders and my elspa a must bare 
been "ORE and aquatic, and when the type became terrestrial 
we (still speculating) would imagine a form somewhat Fig. 1. 
like the young d (Fig. 1) discovered by Sir John 
Lubbock in England, which combines in a remarkable 
degree the ai of E ps in Sete and the sig aeo 
wingless insects, such a , Podura Som 
such forms may e e rues lir diaced late in ue neris 
Phi for the interesting discoveries of fossil insects in 
and 


an 
uthus?), closely resembling a species now living in California; to- 
gether with another scorpion-like animal, Mazonia Woodiana; while the 
Devonian insects des uns from ue coe 4 Mr. tiges are nearly as 
Dr.D 
highly organized as our grasshop d May-fi r. Dawson has 
also discovered a S dk developed prm CXlobius) w the Lower Coal 
Measures of Nova Scotia; so ust go back the Silurian 
dap ge prototype, of insects. As to the be. Crustacean being a 
rm, have we not among the earliest known Crustaceans, the Trilo- 
ds (Paradowides) and several allied forms of lov Silurian age, whose 
larval form was, undoubtedly, more or less worm-like, as are certain de- 
graded marine Pill-bugs ( Bopyrus) of the present pee. Messrs. Meek and 
Worthen describe ee Shrimps CAnthropalemon) and Sand-fleas, in the 
Lower Coal Measu f Illinois, associated with a large Eurypterus, being 
a gigantic eas toit ;& Trilobite (Euproops Dane) resembling our 

* The Pal»ontology of Illinois. Articulate Fossils of the Coal Measures. vereinen 
of the Report o of the Illinois State Survey.) By Messrs, Meek, Worthen and Scudde: 
tember, 1868. 8vo. 
