1883.] Zvilogy. 1179 
treat to read after an author as painstaking and original as Mr. 
Dimmock. In the same number of Psyche appears a posthu- 
mous paper by Mr. V. T. Chambers on the “ Classification of 
the Tineidz.” Mr. E. B. Reed has compiled a General Index 
of the Entomological Reports of the Province of Ontario, from 
1870-1882. It consists of (1) List of Illustrations, (11) Classified 
list of Illustrations, and (111) General Index. These are prepared 
somewhat after the style of our “General Index to the nine 
reports on the Insects of Missouri,” except that the original 
sources of the illustrations are not given, which are to be regretted, 
as they are, for the most part, not credited in the reports. An 
index to food-plants would also have increased its value. One of 
the most noticeable errors is in the index, where we find “Cadop- 
tenus septemdecim, v., 31.” There is no such name on p. 
ol. v, but on p. 30 there is a reference to C. [tcada] septemdecim. 
On the whole, however, the compiler’s work has been well done, 
and it will be found most useful to those who have occasion to 
use the reports. 
ZOOLOGY. 
gards the line of fifty fathoms as the ideal boundary line between 
the littoral and the deep-sea fauna, and that this depth is pretty 
o- on, extends to a depth of 150 fathoms. In the tropics, Fuchs 
claims, there is a comparatively sterile region, extending from 
eae thirty to ninety fathoms; but no such region exists, as 1S 
Di as. 
li Now, he asks, by what physical conditions is this boundary 
ia aar fathoms. determined, and ae himn m aep 
Wi gs litioning cause of the appearance of the deep- i 
ie ~ana he claims that pinpoaea plays but a very — 
ite het in the distribution in depth of sea animals. Among : 
eth brings forward to prove this is the absence of deep-se 
kuo Shoal water in the Arctic regions, where the won 
the same as at the bottom of the sea in the tropics. +n 
VOL, XVIL—no, XI 78 
