72' Verm} 
XV. VERMES. 
[ 1905 ] 
n. sp., mosses, loch margin, figg., P, laticeps n. sp., figg., stream, on 
Fontinalis , P. humerosa (cf. P. alpium), ground moss and Frullania , 
Scotch Lochs, Ness, and Fort Augustus, Murray, Tr. R. Soc. Edinb. 
xli, p. 372 ; P, flaviceps , P. acuticornis , P. macrostyla, P. rugosa , 
P. brevipes, St Kilda, Murray, Ann. Scott. Nat. Hist.1905, p. 95. 
Pleurotrocha gibba , Aregua, stream, von Dad ay (97) p. 95 ; P. parasitica , 
morphology and habits, de Beauchamp (14). 
Plcesoma hudsoni , figg., Finland, Switzerland, &c., Wesenberg-Lund (445) 
p. 139 ; P. hudsoni , P. truncatum , noted for Shetland and N. hist., 
Murray, P. Phys. Soc. Edinb. xvi, p. 51, 1905 ; P. lenticulare (? P. 
truncatum), Iceland, Wesenberg-Lund, P. R. Soc. Edinb. xxv, 1905, 
p. 1130. 
Polyarthra fusiformis taken from Rotifera, classed with Dasydytes stylifer 
under Gastrotricha, as Stylochceta , Hlava, Zool. Anz. xxviii, pp. 331- 
336 P. platyptera^ Lake Kaban, notes, Meissner (282) p. 39 ; P. 
platyptera, variations, seasonal, Montiggl, Huber, Arch. Hydrobiol. i, 
pt. 2, pp. 176-181 & 193-204 ; P. platyptera, fig., in Neuenburger- 
see, &c., Wesenberg-Lund (445) p. 134 ; P. platyptera, St Kilda, 
Murray, Ann. Scott. Nat. Hist. 1905, p. 55 ; P. platyptera, Ice- 
land, Wesenberg-Lund, P. R. Soc. Edinb. xxv, 1905, p. 1128. 
Pornpholyx sulcata, bionomic notes, infested by fungus, Montiggl, Huber, 
Arch. Hydrobiol. i, pp. 163 & 193-204 ; P. sulcata, figg., Neuenburger- 
see, Wesenberg-Lund, t. c. p. 152. 
Proales felis, Corumba, von Daday (97) p. 96. 
Pterodina mucronata , fig., Aregua, von Daday, t. c. p. 116. 
Rattulus bicornis, fig., Wesenberg-Lund (445) p. 136 ; R. bicornis , R. tigris, 
Paraguay. 
Rotifer macrurus , stream, Aregua, Paraguay, R. tardus, stream, Aregua, 
Paraguay, R. vulgaris, Asuncion, R. macroceros, Yuguari R., von 
Daday (97) pp. 88 & 89. 
Salpina brevispina, fig., S. custala, fig., S. macracantha, Estia Postilion, 
S. spinigera, Asuncion, von Daday, t. c. pp. 105 & 106. 
Scaridium longicaudum, S. endactylotum, Paraguay, von Daday, t. c. 
pp. 102-104. 
Synchceta, definition of genus, S. baltica ( = $. apus ), fig., also occurs in 
brackish water, S. gyrina (-S. baltica Gosse), fig., sea or brackish 
water, Lauterborn (244) pp. 22-24 ; S. littoralis, fig., S. cecilia 
( = baltica Gosse), S. neapolitana, fig., S. triophthalma, fig., >S. monopus. 
Gulf of Bothnia, Baltic, figg., Lauterborn, t. c. pp. 24-30 ; S. neglecta, 
Iceland, Wesenberg-Lund, P. R. Soc. Edinb. xxv, 1905, p. 130 ; 
S. tremula, fig., N. pectinata, fig., Greenland, Wesenberg-Lund, t. c. 
pp. 132 & 133 ; S. oblonga, Icaparai, S. pectinata, Lugua, Paraguay, 
von Daday (97) p. 94. 
Triarthra longiseta , Lake Kaban, notes, Meissner (282) p. 40 ; T. longiseta, 
seasonal variation, bionomical notes, Montiggl, Huber, Arch. Hydro- 
biol. i, pp. 174-176 & 193-204 ; T. longiseta, figg., Greenland, 
Wesenberg-Lund (445) p. 151. 
GASTROTRICHA. 
Chcetonotus pusillus n. sp., Corumba, figg., flood-pools, C. dubius n. sp., fig., 
close to C. bogdanowii, G. similis, descript, fig., Estia Postilion, C. 
hystrix, figg., distinguished from similis, G. ericinaceus n. sp., figg., 
Estia Postilion, close to G. chuni, G. heterochcetus n. sp., figg., nearest 
to G. longispinosus, von Daday (97) pp. 74-82. 
Gossea fasciculata n. sp., figg., Estia Postilion, G. pauciseta n. sp., figg., 
note on G. antennigera of Gosse & Voigt, von Daday, t. c. pp. 82-86. 
