TITLES. 
Verm. 19 
320. Oliver, Thomas. Ankylostomiasis, or Miners’ worm disease, foreign 
preventive measures. P. R. Soc. Edinb. xxv, 1905, pp. 813-816. 
321. Onelli, 0. Los nomatholmintos prooimarios en ol Jardin Zooldgioo. 
ltevist. Jard. Ruoiios Ayres 1905, No. 2, pp. 144-149. 
Ostenfeld, C. H. [See Wesenberg-Lund & Ostenfeld (446).] 
323. Parkinson, J. Porter. Hydatid cyst simulating subphrenic abscess. 
Lancet 1905, i, pp. 289 & 290. 
324. Patterson, A. H. Malformed worm. Zoologist, Ser. 4, ix, p. 398, 
1905. 
[139.] Pearl, Raymond & Fuller, W. N. [Variation and correlation in 
the Earthworm. Biometrika iv, pt. 2, p. 211, 1905. See (139).] 
325. Pelsener, Paul. L’origine des animaux d’eau douce. Bull. Ac. 
Belgique 1905, 12, pp. 699-740. 
326. IPelz, A. Geologie des Konigreichs Sachsen. Leipzig, 1904. 
327. Penard, — . Sur un rotifkre du genre Proales. [Parasitic to Helio- 
zoan.] Arch. Sci. Nat. (from C.R. des Stances) xx, 10, p. 495. 
328. Penel, R. Les Filaires du sang de Phomme. Arch, parasit. ix, 
p. 185. 
329. *P£ rez, Ch. Revue annuelle des theses de Zoologie. Rev. Scient. (5), 
T. iii, pp. 362-367. [ Annelides , pp. 366 & 367.] 
350. Perroncito, E. On encystation of Ankylostoma in free state. 
C.R. Ass. Franc, p. 873, 1904. 
351. Phillips, Ll. Powell. Eucalyptus oil as a vermifuge in Ankylo- 
stomiasis. J. trop. Medicine viii, p. 241, 1905. 
352. Pierantoni, U. Cirrodrilus cirratus n. gen. et sp. parassita dell* 
Astacus japonicus. Annuar. Mus. Univ. Napoli, Nuov. Sor. No. 31, 
1905. 
353. . Sopra alcuni Oligocheti raccolti nel fiume Sarno. Op. cit. 
No. 26, 1904. 
354. Pieri, Gino. L’ infezione dalP Anchilostoma per la via cutanea. Atti 
Acc. Lincei xiv, 2, pp. 547-554. 
355. . Osservazioni sulla biologia dell’ Anchilostoma. T. c. pt. 2, 
pp. 727-730. 
356. Piguet, E. Quelques observations sur l’anatomie de l’appareil circu- 
latoire de certains Oligochktes limicoles. L. variegatus. Bull. Soc. 
Neuchatel xxxii, 1904, pp. 159-161. 
357. . Le Bythonomus lemani De Grube. Rev. Suisse Zool. xiii, 
1905, pp. 617-621. 
358. Pittalonga, G. Nota sobre el Cysticercus fasciolaris y la Tcenia crassi- 
collis. Bol. Soc. espan. v, 4, pp. 191 & 192. 
359. Plotnikow, W. tjber einige rhabdocole Turbellarien Sibiriens. 
Zool. Jahrb. Syst. xxi, 4, pp. 479-490. 
360. . Dber zwei Formen von Ghcetogaster hinnasi Baer. Zool. Anz. 
xxviii, 1904, No. 2, pp. 55 & 56. 
Popoff, N. [See Bugnion & Popoff (54).] 
361. Porta, A. Gli Echinoritichi dei Pesci. [Systematic survey, ex* 
haustive.] Arch. zool. ital. ii, 2, 1905, pp. 148-214. 
