13 Verm. 
Titles. 
1200-1800 
Ward, II. B. Notes on two free- 
living larval Trematodes from North 
America. J. Parasitol. 3 1916 (10-19). 
223 
Ward, IT. B. On the structure and 
classification of North American Para- 
sitic Worms. J. Parasitol. 4 1917 (1- 
11). 224 
Ward, II. B. and Magath, T. B. Notes 
on some Nematodes from Fresh- water 
Fishes. J. Parasitol. 3 1916 (27-64). 
225 
Waterman, N. Over Trichos- 
trongylose by de geit. [Trichostrongylose 
bie der Ziege.J Leiden Tydschr. 
vergelyk. geneesk. gezondh. dierz. 4 
1918 (48-52). 226 
Weber, R. A. Observations on the 
structure of double monsters in the 
earthworm. Biol. Bull. Woods Hole 
Mass. 33 1917 (339-354). 226a 
Welch, P. S. Enchytraeidae (Oli- 
gocliaeta) from the Rocky Mountain 
region. Trans. Amer. Micr. Soc. 36 
1917 (67-81). 227 
Welch, P. S. Enchytraeidae (Oli- 
gochaeta) of the Woods Hole region, 
Mass. Trans. Amer. Micr. Soc. 36 1917 
(119-138)- 228 
Welch, P. S. Snow- field and glacier 
Oligochaeta from Mt. Rainier, Wash- 
ington. Trans. Amer. Microsc. Soc. 35 
1916 (85-124). 228a 
Welsford, E. J. Investigation of 
bulb rot of Narcissus. Ann. Appl. Biol. 
London 4 (36-46). 229 
Wenyon, C. M. and O’Connor, F. W. 
The carriage of ... . eggs of parasitic 
worms by house-flies, with some notes 
on the resistance of cysts to disinfectants 
and other agents. J. Roy. Army Med. 
Corps 28 1917 (522). 230 
Wester, J. Een nieuwe Strongylo'ides 
by veulens. [Ein neuer Strongyloides 
bei Fiillen.] Utrecht Tydschr. Diergen. 
44 1917 (67-73). 231 
Whitney, D. D. The influence of food 
in controlling sex in Hydatina senta. 
J. Exp. Zool. Philadelphia 17 1914 (545- 
558). 232 
Whitney, D. D. Parthenogensis and 
sexual reproduction in Rotifers. Ex- 
perimental Research upon Brachionm 
pala. Amer. Nat. 50 1916 (50-52). 233 
Whitney, I). D. The Transformation 
of Brcichionus pala into Brachionm 
amphiceros by Sodium silicate. Biol. 
Bull. Woods Hole Mass 31 1916 (113). 
234 
Whitney, D. D. The production of 
functional and rudimentary spermatozoa 
in Rotifers. Biol. Bull. Woods Hole 
Mass. 33 1917 (305-315). 234a 
Wickware, A. B. Intestinal parasites- 
of poultry, their prevention and treat- 
ment. Canada Dept. Agric. Health of 
Animals Bull. No. 25 1917 (1-13). 235 
Willetts, D. G. A statistical study of 
Intestinal Helminthiasis. [Southern 
Med. Jl. 10 1917 (42-49).] Abs. in 
Trop. Dis. Bull. Lond. 9 1917 p. 276. 
236 
Wirth, D. Filariosen bei einheim- 
ischen Pferden (Vierte Mitteilung). 
Zs. Infektkrankh. Haustiere Berlin 18- 
1917 (380-413). 237 
Wohl, M. G. Trichiniasis. Med. Rec. 
New York 89 1916 (98-101). 238 
Wulzen, R. Some chemiotropic and 
feeding reactions of Planaria maculata. 
Biol. Bull. Woods Hole Mass. 33 1917 
(67-69). 238a 
Yakimoff, W. T .,Schokhor — and Kosel- 
kine — . Microfilaires des animaux au 
Turkestan russe. Paris Bull. Soc. Path, 
exot. 10 1917 (102-105). 239 
Yorke, W. and Blacklock, B. The 
ocurrence of Anhylostoma ccylanicum in 
West African dogs. Ann. Trop. Med. 
& Parasitol. 11 1917 (69-74), 240 
Yorke, W. and Blacklock, B. Obser- 
vations on the periodicity of Microfilaria 
nocturna. Ann. Trop. Med. & Paras. 11 
1917 (127-147). 241 
Yoshida, S. On a trematode larva 
encysted in a Crab, Ilelice tridens (de 
Ilaan). J. Parasitol. 3 1916 (76-81). 
. 242 
Yoshida, S. The occurrence of 
Bothriocephalus liguloides Leuckart* 
with especial reference to its de- 
velopment. J. Parasitol. 3 1917 (17 1— 
176). 243 
Yoshida, S. Some Cestodes from 
Japanese Selachians, including five new 
species. Parasitol. Cambr. 9 1917 
(560-592). 244: 
