XVII. SPONGIJE. 
16 Spong. 
J ukes-Browne & Hill (24) p. 87. +/\ texturata n. sp. from Cenoma- 
nian of Kamajka, near Caslau, Bohemia; Po6ta (35) pp. 10 & 11, and 
(36) pp. 121 & 122, pi., figg. 19 & 20. +P. urceolata Phil. ; Jukes- 
Browne & Hill (24) p. 423. 
C. HEXACTINELLIDA. 
Hexactinellida divided (following Schulze) into A mph idiscophora and 
Hexasterophora ; the latter subdivided into Lychniscosa ancf Hexactin- 
osa. The Hexactinosa comprise three subtribes: (1) Uncinataria 
F. E. S. ; (2) Inermia F. E. S. ; (3) Euplectellaria n. subtr., compris- 
ing the families Euplectellidce , Asconematidce , and Rossellidce ; the 
families Protospongidce , Dictyospongidce , Plectospongidce and Brachio- 
spongidce regarded as incertce seais [i.e. the author abandons his group 
Stauractinophora , v. Zool. Bee. 1902]; Schrammen (46). 
Classification of the Hexactinellida , pp. 23-25 (footnote); criticism of 
Schrammen (46), pp. 115-117: Ijima (22). 
(i) LYSSACINA. 
Family Euplectellidce. 
Euplectellidce , remarks on the family and emended diagnosis (pp. 23 & 
108) ; divided into two subfamilies, (1) Euplectellince (= Euplectellince 
Schulze Holascince Schulze), characterized by the possession of a 
rooting tuft of basal spicules, and (2) Corbitellince (= Tcegerince 
Schulze -f- Placosoma n. g.), comprising forms attached by a compact 
base; Ijima (22) pp. 19-28. 
t Euplectella bianconii n. sp. from the Miocene of Porretta; Nelli (34) 
pp. 193 & 194, pi. x, fig. 1. 
Placosoma n. g. for P. paradictyum n. sp. from the Sagami Sea, 501- 
572 meters; Ijima (22) pp. 2-28 & p. 109, pis. i & ii. 
Family Caulophacida:. 
Caulophaddce n. fam. for the genera Sympagella and Caulophacus , 
formerly placed in the family Asconematidce (the other four genera 
of Asconematidce , viz. Asconema , Hyalascus , Caly cosoma , and Galyco- 
saccus , probably to be referred to the Rossellidce) ; diagnosis and key 
to genera; Ijima (22) pp. 78-84 & p. 111. 
Calycosoma gracile n. sp. from Timor, Sunda Ids. (10° 30' S., 126° 30' E.), 
421 m. ; Schulze (48) pp. 14-21, pi. ii : is identical with Sympagella 
anomala Ij. ; Ijima (22) pp. 119-122. C. validum F. E. S., diagnosis; 
Schulze (48) p. 21. 
Caulophacus F. E. S., diagnosis and key to species ; Ijima (22) pp. 85, 86 
& p. Ill: tabular review of the characters of known species ; 
Schulze (48) p. 13. G. arcticus for Hyalonema arcticum A. Hans., 
fully described; Schulze (48) pp. 1-14, pi. 1 : remarks on ; Ijima (22) 
pp. 118 & 119. G. lotifolium n. sp. from the Sagami Sea, 572 m. ; 
Ijima (22) pp. 87-96 & p. 112, pi. vii. 
Sympagella O. S. to include Aulascus F. E. S., diagnosis and key to 
species, pp. 96, 97 & p. 112; diagnosis emended, p. 121; S. anomala 
n. sp. from the Sagami Sea, 430-572 m., pp. 97-108 & p. 112, pi. viii; 
is identical with Calycosoma gracile F. E. S., to be named Sympagella 
gracilis , pp. 119-122; Ijima (22). 
