SYSTEMATIC. 
Spong. 19 
(44) p. 49. f V. dccurrens Srn. ; Jukes-Browne & Hill (24) pp. 370, 
379, 407, 449, 472 : Rowe (44) p. 49. t V. impressus ; Jukes-Browne 
& Hill (24) pp. 370, 379, 407 : Rowe (44) p. 49. t V. infundibuliformis 
Woodw. ; Jukes-Browne & Hill (24) pp. 379, 395. t F mammillaris 
Smith ; Jukes-Browne & Hill (24) pp. 379, 407, 423, 472 : Rowe 
(44) p. 49. tF radiatus Mant. ; Jukes-Browne (23) pp. 88, 94: 
Jukes-Browne & Hill (24) pp. 370, 379, 395, 407, 423 : Rowe (44) 
p. 49: Wollemann (56) p. 9. tF sp. Jukes-Browne & Hill (24) 
pp. 42, 215, 395, 467. tF striatus Sra. ; Wollemann (56) pp. 8 & 9. 
tF. tesselatus Sm. ; Jukes-Browne & Hill (24) p. 78. 
Incertje Sedis. 
t Brachiolites sp. ; Jukes-Browne & Hill (24) p. 225. 
t Goniospongia striata Gf. ; Schardt & Dubois (45) 395. 
t Scyphia quinquelobata d’Arch. and fS. samueli d’Arch. ; Carez (7) 
* p. 542 : t/$. sp. ; Schardt & Dubois (45) p. 395. 
AStrephinia convoluta Hinde ; Jukes-Browne & Hill (24) pp. 31, 78, 172, 
‘ 215. 
D. DEMOSPONGIJE. 
(i) TETRAXONIDA . 
Tetraxonia, defined, p. 1 and classified into — 
A. Order Tetractinellida, p. 14, with suborders Sigmatophora ( Tetillidce, 
Samidce , Tethyopsillidce ), Astrophora ( Stellettidce , Pachastrellidce , 
Geodidce) and Megasclerophora ( Plalcinidce , Oscarellidce). 
B. Order Lithistida, p. 125, with suborders Hoplophora ( Theonellidce , 
Coscinospongiidce , Pleromatidce , Neopeltidce , Scleritodermatidce, Si- 
phoniidce , and genus Lyidium ) and Anoplia {. Desmanthidce , Leioder- 
matidce , Vetulinidce) ; Lendenfeld (27). 
(a) Order OARNOSA. 
Sub-order MICROTRLENOSA. 
JDercitus Gray, genus defined, with diagnoses of 5 spp. ; Lendenfeld (27) 
pp. 81-83. 
Samidce , definition of the family, to include the sole genus and species 
Samus anonyma Gray ; Lendenfeld (27) p. 28. 
Thrombus Soil., genus defined, with diagnosis of 1 sp. ; Lendenfeld (27) 
pp. 122 & 123. 
Sub-order MICROSCLEROPHORA. 
Definition of the suborder under the name Megasclerophora ; Lendenfeld 
(27) p. 28. 
Family CORTICID^J. 
Corticium 0. S., genus defined, with diagnosis of 1 sp. ; Lendenfeld (27) 
pp. 121 & 122. 
