SYSTEMATIC. 
Spong. 23 
Lubomyrskia irregularis : Iakhontoff (23) p. 3. 
Metschnikowia spinispiculum (Carter) T., redescribed, p. 243 ; M. Jilholi T., 
redescribed, pp. 243, 244 : Topsent (50). — M. tuberculata , M. inter- 
media : Sowinsky (46) p. 173. 
Oceanapia N., remarks on genus, pp. 127, 128; 0. bacillifera , n. sp., 
diagnosed and described, pp. 128-130: Wilson (60). — 0. robusta 
(Bowerbank) N., redescribed : Topsent (50) pp. 228, 229. 
Pachychalina acapulcensis , n. sp., diagnosed and described: Wilson (60) 
pp. 124-127. 
Pellina semitubulosa , P. longispicula f P. foraminosa: Sowinsky (46) 
p. 289. 
Petrosia crassa (Carter) L., redescribed: Topsent (50) pp. 240, 241. — 
P. variabilis crassa , n. subsp., diagnosed and described, pp. 118-121; 
similis densissima , n. subsp., diagnosed and described, pp. 121-124: 
Wilson (60). 
Phlceodictyon Jistulosum B., redescribed, pp. 235, 236 ; P. coriaceum y n. sp., 
described, p. 237 ; P. elongatum (Topsent) L., redescribed, p. 238 ; 
P. reticulatum, n. sp., described, pp. 238, 239; P. cereum , n. sp., 
described, pp. 239, 240 : Topsent (50). 
t Phylosiphonia pumila L., redescribed: Thum (49) pp. 17, 18. 
Proto schmidtia qrimmi, P. simplex , P. transitans , P. foraminosa : Sowinsky 
( 46) pp. 173, 328. 
Renieridce , nutrition in : Cotte (6). 
Reniera implexa Sell., redescribed, p. 244 ; R. foraminosa , n. sp., 
described, p. 245; R. spongiosa , n. sp., described, p. 245 ; R. utriculus , 
n. sp., described, p. 246 ; R ., sp., described, p. 246 : Topsent (50). — • 
R. simulans, nutrition in : Cotte (6). — R. Jlava , R. alba , R. aquoe- 
ductus , R. informis , R. inflata , R. palmata. R. niqricans : Sowinsky 
( 46) pp. 173, ‘289. 
Rhaphisia spissa T., redescribed : Topsent (50) pp. 233-235. 
Schmidtia intermedia : Sowinsky (46) p. 289. 
iSpinosella sororia , var. dilatata D., rodescribod, pp. 18, 19; S. sororia , 
var. elongata 1 redescribed, pp. 19, 20: Thum (49). 
Spongillides from Roumania : Chirica (2). 
Spongilla lacustris , external characters described : Gillot (13). — S. fiuvia- 
tilis, spermatogenesis in : Gorich (14). — S. microgemmata : Iakhon- 
toff (23) p. 3. — S. lacustris : Range (39) p. 238. 
Veluspa baicalensis, V. fusifera : Iakhontoff (23) p. 3. 
Family Axinellid^e. 
Description of family: Topsent (50) p. 137. 
t Acanthoraphis intertextus : Jukes-Browne & Hill (26) p. 505. 
Axinella vasonuda , n. sp., described, pp. 140, 141 ; A. vellerea , n. sp., 
described, 141, 142; A. flustra T., redescribed, pp. 139, 140: Topsent 
(50). — A. rugosa : Schepotieff (42), p. 3. 
Auletta sycinularia Sch., resdescribed, pp. 143, 144; A. sessilis , n. sp., 
described, p. 144, 145: Topsent (50). — A. dendrophora , n. sp., 
diagnosed and described: Wilson (60) pp. 158-161. 
Ralicnemia constellata T., redescribed, azorica var. n. : Topsent (50) 
p. 149. 
Higginsia thielei T., redescribed : Topsent (50) p. 150, 151. 
Hymeniacidon sanguineum , bionomics : Cuenot (7). — II. sanguineum, 
Mar. Biol. Ass. (34). 
Phakellia robusta B., redescribed, p. 143; P. lamelligera, U. sp., diagnosed 
and described, pp. 155-158: Wilson (50). — P. ventilabrum : Schepo- 
tieff (42) p. 3. 
