XVII. SP0NGM5. 
[ 1904 ] 
12 Spong. 
B. from: Etheridge (11). — Oolitic and cretaceous rocks south of Scar- 
borough, sponges from: Fox-Strangways (12) p. 40 et seq. — English 
Chalk, zonal distribution of species of Porosphcera in: Hinde (18) pp. 6- 
10. — Gephalites longitudinalis , Pharotrospongia strahani , Plinthosella 
squamosa, Plocoscyphia convoluta, P. sp., Porosphcera globularis , P. nuci- 
formis , P. patelliformis from the Surrey Chalk : Hinde (19). — English 
Chalk, Placotrema cretaceum, Ventriculites decurrens , V. impressus , P. 
alcyonoides , V. radiatus, Plocoscyphia, Gamerospongia , Porosphcera pileolus , 
P. sp. from the : Holmes (20). — Kreideformation, fossil sponges from the : 
Jahn (25). — Upper, Lower and Middle English Chalk, list of fossil sponges 
from: Jukes-Browne & Hill (26). — Chalk of Yorkshire Coast, Ventri- 
culites radiatus, V. cribrosus, V. impressus, V. infundibuliformis, V. convo- 
lutus, V. decurrens, Plocoscyphia conpoluta, Porochonia simplex, Coscinopora 
infundibuliformis, Guettardia stellata, Leptophragma murchisoni , Gcelopty- 
chium agaricoides , Gallopegma obconicum, Heterostinia obliqua, Siphonia 
konigi, Stelletta inclusa, Gliona cretacea , Porosphcera globularis, P. globularis 
var. nuciformis, P. pileolus, P. pileolus var. patelliformis, P. pileolus var. ar - 
recta, from : Rowe (41) pp. 292, 293. — Flint, Denmark, fossil sponges from : 
Ussing (55). — Solnhofener Plattenkalke, Ammonella quadrata, n. g., n. sp., 
Phyllospongia lumbricaria, P. acuminata, P. elongata, P. rubarticulata, P. 
latifrons, P. varius , from the: Walther (57) pp. 162, 163. 
(iv) Paleozoic. 
Silurian of Rio Trombetas, Para, Brazil, sponges from : Clarke (3). 
IY. SYSTEMATIC. 
[A name of a species, followed only by a reference to a name from the list 
of titles, is a record of occurrence pure and simple. The approximate 
locality (or horizon) can be ascertained by looking up the author’s 
name attached to the particular species in the above (section hi).] 
A. PORIFERA, GENERAL. 
B. CALCAREA. 
(i) HOMOCCELA. 
Family Clathrinid^e. 
Clathrina coriacea , G. lacunosa : Mar. Biol. Ass. (34). 
Family Leucosoleniida:. 
Leucosolenia botryoides , L. complicata , L. variabilis : Mar. Biol. Ass. 
(34). — L. complicata, L. variabilis , L. botryoides redefined and re- 
described in full: Minchin (36) pp. 360-394. 
(ii) HETER OGCELA . 
Family Sycettida:. 
Sycon seu Sycandra raphanus, spermatogenesis in : Gorich (14). — S. com- 
pressum, S. coronatum : Mar. Biol. Ass. (34). — S. setosa grown in 
water deprived of calcium salts: Maas (31, 32). — S. setosum, S. 
coronata : Sowinsky (46) p. 289. 
t Tremacystia d'orbignyi, T. siphonoides : Jukes-Browne & Hill (26) 
p. 505. 
