No. 400.] REVIEWS OF RECENT LITERATURE. 333 
The first number of Vol. X of the Journal of Comparative Neu- 
rology contains “ The Sense Organs of Nereis virens, Sars,” by F. E. 
Langdon; ‘‘ The Roof and Lateral Recesses of the Fourth Ventricle, 
Considered Morphologically and Embryologically," by J. A. Blake ; 
* Observations on the Weight and Length of the Central Nervous 
Organs and of the Legs in Frogs of Different Sizes," by H. H. Don- 
aldson and D. M. Schoemaker ; and * A Report of the Neurological 
Seminar of the Marine Biological Laboratory, Woods Holl, Mass., 
for the Season of 1899," by A. D. Morrill. The number also con- 
tains an obituary notice of Fanny E. Langdon, by Professor Reig- 
hard, and the usual literary notices. 
Miss K. J. Bush has published in the Proceedings of the Academy 
of Natural Sciences of Philadelphia a description of a number of new 
species of gastropods belonging to the genus Turbonilla from the 
western Atlantic fauna. The paper includes a synoptic list of 
species and a thorough revision of the synonymy, based upon exam- 
ination of a number of museum collections. 
Dr. S. Prowazek has published in Vol. XI of the Vienna Arbeiten 
a very exhaustive and fully illustrated account of the conjugation of 
Bursaria truncatella. He also contributes many interesting obser- 
vations on the structure, nutrition, excretion, encystment, conjugation, 
division, and parasites of Sty/onychia pustulata. 
The Echinorhynchi parasitic in Cetacea have been brought together 
in a critical discussion by Shipley (Arch. Paras., Vol. IL, pp. 262— 
269). 
In a paper on the Porocephali of the dog and some other mam- 
mals, Neumann! shows that, contrary to the generally accepted 
belief, the larval forms of these parasites are not accustomed to 
abandon their cysts, but probably perish in them, and that, except 
in rare cases, they are harmless to their hosts. The larval form of 
P. constrictus, which is recorded as a dangerous parasite of man in 
Africa, is probably as innocuous as other species, and certainly was 
not the cause of death in the cases reported. 
A revision of the Echiurida and a discussion of their geographical 
range are appended by Shipley? to his account of the forms collected 
! Neumann, G. Sur les Porocephales du chien et de quelques mammiferes. 
Arch. Paras., tome ii, No. 3, pp. 356-361, 1899. 
? Shipley, A. E. On a Collection of Echiurids, etc. A. Willey's Zo. Results, 
Pt. iii, pp. 335-356, 1 plate, May, 1899. 
