No. 392-] REVIEWS OF RECENT LITERATURE. 673 
reoiteus, Neumayer has recently published the results of his studies.' 
He finds that (1) the recurrens supplies the muscles cricoarytenoi- 
deus posticus and lateralis and the thyreoarytenoideus ; (2) the 
recurrens, together with the laryngeus superior, innervate the inter- 
arytenoideus transversus and obliquus, the aryepiglotticus and the 
muscles of the false vocal cord; (3) the cricothyreoideus is supplied 
by the laryngeus superior. 
Holland’s Butterfly Book? is what its title claims, “a popular guide 
to a knowledge of the butterflies of North America,” and compares 
very favorably with the numerous books upon butterflies published 
in England and on the continent. The forty-eight plates are, as a 
whole, excellent, and will enable an amateur to identify a very large 
proportion of the butterflies he may collect. The scientific value of 
the illustrations would have been enhanced if the species figured from 
the original types had been indicated. The text cannot be regarded 
as a contribution to science, and the essentially popular character of 
the work in no way justifies the flippant and egotistical style employed. 
With “the entire literature relating to the subject” at command, 
strictly scientific data, such as the distribution of the species, should 
have been stated more accurately and in greater detail. 
The book is sold at a very reasonable price, and it is hoped that 
its sale will enable Dr. Holland to carry out his intention and issue 
a similar volume upon the moths of North America. This is even 
more needed than Tke Butterfly Book. 
Embryos of Bdellostoma. — Franz Doflein describes? several em- 
bryonic stages of Bdellostoma which he obtained at Pacific Grove, 
California. Before oviposition the eggs lie in a fold of the meso- 
varium which increases in size and becomes richly vascular and forms 
a complicated follicle apparatus. The characteristic hooks do not 
appear until the eggs have reached their full size. They are then 
formed in pockets of the follicular apparatus, the rest of which forms 
the horny shell. Only a small per cent of the eggs taken are fer- 
tilized, and apparently fertilization takes place outside the mother. 
The embryo appears on the flat side of the egg, the head being 
towards the opercular pole. Doflein describes, and his figures show 
1 Sitsungsber. Gesell. Morph. und Physiol., vol. xiv, p. 142, München, 1899. 
2 Holland, W. J. Zhe Butterfly Book. A popular guide to a knowledge of the 
butterflies of North America. New York, a & McClure Co., 1898. xx + 
382 pp., 8vo, 48 colored plates and text-figure 
3 Sitsungsber. Gesell. Morph. und Physiol., ae xiv, p. 105, Miinchen, 1899. 
