Literary Notices. XiX 
yond it in a manner similar to that of the ultra-terminal fibers de- 
scribed by Rurrint. In the twelve preparations described and figured 
by the author, eight show one or more fine nerve fibrils separating 
themselves from the main fiber either just before it enters the granular 
substance or just after it leaves it. These secondary fibrils pass on 
for variable distances to end either on the same or on a contiguous 
muscle fiber.: He therefore concludes that the motor nerve in the 
striated muscle of insects does not as a rule endin the DovEreE’s eleva- 
tion, but in the majority of cases passes beyond this, subdividing into a 
number of fibrillae, which endin other eminences of granular matter 
either in the same or in one of the neighboring muscle fibers. 
While the author has neither, with RaNnvirrR, established the 
presence of a terminal arborization in the granular sole-plate of the 
striated muscles of insects, nor, with FOETTINGER, determined a direct 
anatomic relation between the nerve fiber and the striae of the muscle 
fiber, he seems, if I interpret his figures and descriptions correctly, to 
be inclined to favor the view of the latter that the ultra-terminal fibrils, 
at least, are often closely related to the striae of the muscle fiber. 
The structure of the motor ending seems, however, from the figures 
given, to resemble in many respects that of the terminal motor plaques 
found in the striated muscles of vertebrates and it seems probable that 
a further study of these endings by some method which more com- 
pletely stains the terminal nerve fibrils and more perfectly differentiates 
the nerve and muscle tissues will show a still greater correspondence. 
DR. LYDIA M. DEWITT. 
The Comparative Anatomy of the Brains of Lemurs and Other Mammals. ' 
Professor ELLIoT SmitH explains in his introduction that this in- 
vestigation was undertaken primarily to consider the possibility of 
homologizing the sulci of the cerebral hemisphere in different orders of 
mammals; but on account of the mass of the material to be considered 
he has found it necessary to limit this report in two ways, (1) by con- 
fining attention to two sulci, the only two which are absolutely con- 
stant in all Primates; viz., the calcarine and Sylvian; and (2) by re- 
stricting the detailed account of the sulci to the lemurs with, however, 
extensive comparisons with other mammalian orders. 
This account fills 112 pages and is illustrated by 66 text-figures 
drawn with the beautifully clear, bold outlines characteristic of the 
1 SmitH, G. ELitiot. On the Morphology of the Brain in the Mammalia, 
with Special Reference to that of the Lemurs, Recent and Extinct. TZ7vams. 
Linnean Soc. of London, 2 Ser., VIII, Part 10, 1903. 
