1895.] The Genera of Branchiostomidae. 459 
' P.S. Shortly before the proof of the present note came to 
hand, a brief article “ On the species of Amphioxus,” by J. 
W. Kirkaldy, became known to me; it is published in the 
Report of the British Association for 1894 (pp. 685, 686). 
Three genera are recognized, (1) Branchiostoma with 4 species, 
(2) Heteropleuron with 3 species, and (3) Assymetron with 1. 
Heteropleuron is a compound of Paramphiorus and Epigonich- 
thys, and consequently the latter name should have been 
retained for it. A. pelagicus was overlooked by Mr. Kirkaldy 
as it had been previously by Messrs. Andrews and Willey. 
RECENT LITERATURE. 
Ord’s Zoology.'—A patient bibliographic research undertaken by 
Mr. S. N. Rhoads to unearth a copy of the Second American Edition 
of Guthrie’s Geography containing an account of North American 
Zoology by Mr. George Ord, was finally successful, and the one copy 
known to be extant was found in the possession of Dr. J. Solis Cohen 
of Philadelphia. Through the courtesy of the owner, Mr. Rhoads 
was allowed to reprint the part relating to Zoology, and in editing the 
work he has been zealous in reproducing as nearly as possible the style, 
form, paging, paragraphing, typography and inaccuracies of the origi- 
nal, 
The desirability of a reprint of this rare book is evidenced by the 
numerous applications to librarians for citations from the work. 
In an appendix Mr. Rhoads gives the complete titles of the different 
editions of Guthrie’s Geography, some further historical data, and what 
may be termed a commentary on the species referred to by Mr. Ord. 
A number of names of American mammalia are settled beyond further 
disturbance. 
A speaking likeness of the eminent naturalist faces the title page, 
and adds greatly to the interest of the volume. : 
1 A Reprint of North American Zoology, by George Ord. Being an exact re- 
production of the part originally compiled by Mr. Ord for Johnson & Warner, 
and first published by them in their Second American Edition of Guthrie’s 
Geography in 1815. Edited by Mr. S. N. Rhoads, Haddonfield, N. J , 1894. 
