638 DR. R. VON LKNDKNFELD ON THE SYSTEMATIC [DeC. 21, 



1174. Pocta, P. Le dfiveloppemeiit des fiponges fossiles. Arch. Slav. Biol. 



torn. i. fasc. 1, pp. 23-25 (18S6). 

 1 175. . Ueber einige Spongien aus dem Dogger des Fiitifkii-chner Gebirges. 



JB. kon. ungar. geolog. Ansfalt. Budapest, Kilian (188(5). 

 [1176.] Polejaeff, N. de. Ueber das Sperma imd die Spermatogenese bet 



Sycandra raphanus (Haeckel). Ameiqer der Jcaiserlichen Akademie der 



Wissensckaften Wien, Bd. 1882, pp. 237-238 (1882). 

 1177. . Ueber das Sperma und die Spermatogenese bei Sycandra raphanus, 



Haeck. SB. Ak. Wien, Bd. kxxvi. pp. 276-298 (1882). 

 [1178.] . Ueber das Sperma und die Spermatogenese bei Sycandra 



raphanus. (Ausz.) Biol. Centmlhl. pp. 180-181 (1882). 

 1179. . Eeport on the Scientific Eesults of the Voyage of H.M.S. 



' Challenger.' Oalcarea. (1884.) 

 1180. . Eeport on the Scientific Eesults of the Voyage of H.M.S. 



' Challenger.' Keratosa. (1884.) 



1181. Poleschajew, K. N. On the Structure and Cla.s.siflcation of Horny 

 Sponges. [Eussian.] Arh. Petersb. Ges. Bd. svi. Heft 1, p. 17 (1886). 



1182. Pomel, A. Pal6ontologie de la Province d'Oran. Spongiaires. Orau 



(1872). 



1183. Pontoppidan, E. Norges natuurl. historic. I. Kjobenhavn (1752). 



1184. . Natural History of Norway. London (1755). 



1185. Portis, A. On Sponges. Mem. Ace. Tor. ser. 2, vol. xxxiv. p. 71 (1883). 



1186. Potts, E. Some new genera of Freshwater Sponges. P. Ac. Philad. 

 p. 149 (1880). 



1187. . Some new genera of Freshwater Sponges. P. Ac. Philad. p. 176 



(1880). 



1188. . Freshwater Sponges of Fairmont Park. P. Ac. Philad. 1880, 



pp. 330-331 (1880). 

 1189. . Some new genera of Freshwater Sponges. P. Ac. Philad. 1880, 



p. 356 (1880). 

 1190. . Some new genera of Freshwater Sponges. P. Ac. Philad. 1881, 



pp. 149, 150 (1881). 

 1191. . The genus Carterella vs. Spongiophaga pottsi. P. Ac. Philad. 



1881, pp. 460-463 (1881). 

 [1192.] . New genera and forms of Freshwater Sponges. (Abstr.) Ann. 



M. N. H. ser. 5, vol. viii. pp. 387-389 (1881). 

 1193, . The genus Carterella y%. Spongiophaga pottsi. Ann. M. N. H. 



ser 5, vol. ix. pp. 330-333 (1881). 

 [1194.] . Freshwater Sponges of Fairmont Park. (Abstr.) J. R. Micr. 



Soc. vol. i. pp. 613-614 (1881). 

 1195. . Three more Freshwater Sponges. P. Ac. Philad. 1882, pp. 12-14 



(1882). 

 1196. . Three more Freshwater Sponges. J. R. Micr. Soc. vol. ii. p. 351 



(1882). 

 1197. . Sponges from the neighbourhood of Boston. P. Ac. Philad. 1882, 



pp. 69-70 (1882). 

 [1198.] . Sponges from the neighbourhood of Boston. (Abstr.) J. R. 



Micr. Soc. vol. ii. pp. 515-516 (1882). 



1199. . Three more Freshwater Sponges. Ann. M. N. H. ser. 5, vol. ix. 



pp. 474-476(1882). 



1200. . Sponges from the neighbourhood of Boston. Ann. M. N. H. 



ser. 5, vol. x. pp. 72-73 (1882). 



[1201.] . Three more Freshwater Sponges. (Abstr.) Nature, vol. xxvi. 



p. 43 (1882). 



