No. 392.] REVIEWS OF RECENT LITERATURE. 675 
surface and only later extend to the dorsal side, and would explain 
this condition by the fact that all of the dorsal ectoderm has been 
utilized in the formation of nervous tissue. In the same journal 
(pp. 208 ff.) Dr. H. K. Corning comes to directly the opposite con- 
clusions. His observations were made upon the embryos of the frog, 
and he bases his opinions upon the negative appearances of the 
forms studied, and also upon a critical analysis of Miss Platt’s 
papers. 
Zoological Notes. — In the journal of the Queckett Microscopical 
Club Mr. D. J. Scourfield has described the winter egg of Leydigia 
acanthocercoides. The proto-ephippium of this rare lynceid is the 
most highly organized of any yet found in the group and approaches 
that of the Daphnidez. The author is engaged upon a study of the 
epipphia of the Cladocera and desires material for investigation. 
The Copepoda of Lincoln, Neb., have been enumerated by Mr. 
A. D. Brewer in the last muer of the journal of the Cincinnati 
Society of Natural History. 
Regeneration in Crustacea has been studied comparatively in many 
groups by Przibram (47d. Zool. Inst, Wien, Bd. XI). The author 
calls attention to the extraordinary resemblance of the regeneration 
phenomena in organisms to the regeneration of crystals, 
Miss Rathbun (N. A. Fauna, No. 14) enumerates four species of 
decapod crustacea from Tres Marias Islands, off the west coast of 
Mexico. 
Miss Harriet Richardson has just published a key to the isopod 
crustacea of the Pacific coast of the United States (Proc. U. S. Nat. 
Mus., Vol. XXI, pp. 815-869, 1899). Ninety-seven species are 
enumerated, including the terrestrial forms. 
North-American entomology has had no keener observer or more 
careful and conscientious recorder than the late Henry G. Hubbard. 
Since: his death Mr. E. A. Schwarz has printed two series of Mr. 
Hubbard’s most interesting letters ; one, in xtomological News for 
April, describes the home of Dinapate wrightii; and a second, in 
Psyche for May, gives an account of the insect fauna of the giant 
cactus of Arizona. 
No. 4 of Vol. XXV of the Zransactions of the American Entomo- 
logical Society concludes with Fox’s study of the North-American 
Mutillidæ. The high character maintained by this society in all of 
its publications is well illustrated in this most admirable paper. 
