16 Spong. xvii. sponge. [1904] 
redescribed, pp. 207-218 : Ijima (24). — S., sp., described, Wilson 
( 60) pp. 54-56. 
Vitrollula Ij., characters of the genus, p. 37 ; V. fertilis Ij., redescribed, 
pp. 38-55 : Ijima (24). 
(ii) DICTYONINA. 
Family CosciNOPORiDiE. 
Cosdnoporidce , characters of family : Schulze (43) p. 178. 
Bathyxiphus , sp., described : Wilson (60) pp. 75-77. 
Chonelasma schulzei , T. redescribed, pp. 51-53 ; G. ijimai T., redescribed, 
pp. 53-55: Topsent (50). — C. calyx F. E. S. (sp. ?), redescribed: 
Wilson (60) pp. 74, 75. 
t Coscinopora infundibuliformis , G. quincuncialis , G. sp. : Jukes-Browne 
& Hill (26) p. 506. — G. infundiouliformis : Rowe (41). 
\Guettardia stellata : Rowe (41). — G. angularis y G. stellata : Jukes- 
Browne & Hill (26) p. 506. 
t Leptophragma murchisoni : Rowe (41). — L. fragilis , L. murchisoni : 
Jukes-Browne & Hill (26) p. 506. 
+ Pleurostoma radiatum : Jukes-Browne & Hill (26) p. 507. — P. bohe- 
micum , P. scyp/ius: Jahn (25). 
Family Tretocalycid^e (formerly Tretodictyid^e, Schulze). 
Tretocalycidce (formerly Tretodictyidve F. E. S.), characters of family with 
list of genera: Schulze (43) pp. 179, 180. 
Hexactinella labyrinthica , n. sp., diagnosed and described, pp. 77-82; 
//. ventilabrum Carter (sp. ?), described, pp. 82, 83; H. tubulosa 
F. E. S. (sp. '1), described, pp. 83, 84: Wilson (60). — H. filholi , n. sp., 
described : Topsent (53). — H. grimaldii T., redescribed : Topsent 
(53a). 
Sclerothamnopsis compressa, n. g. et sp., diagnosed and described : 
Wilson (60) pp. 84-87. 
Family Aulocystid^e. 
Characters of family : Schulze (43) p. 180. 
Family Dactylocalycim:. 
Characters of family, with list of genera: Schulze (43) p. 180. 
Auloplax , characters of genus, pp. 148, 149; A. auricularis F. E. S., 
redescribed, pp. 47-50 : Schulze (43). 
Family Euretid^e (includes Farreid^e). 
Characters of family with list of genera : Schulze (43) pp. 177, 178. 
^ Ammonella guadrata , n. g., n. sp., described : Walther (57) pp. 162, 163. 
t Graticularia vulgata , G. subserviata: Jahn (25). — G. fittoni, G. subseriata , 
G. sp. : Jukes-Browne & Hill (26) p. 506. 
t Gribrospongia subreticulata : Jahn (25). 
Eurete , characters of genus, p. 143 ; E. sp., described, pp. 37, 38 : Schulze 
(43). — E. erectum tubuliferum , n. subsp., diagnosed and described, 
