SYSTEMATIC. 
Spong. 15 
Family Leucopsacid^. 
Leucopsacidce, characters of family with list of genera, p. 175 : Schulze 
(43). 
Leucopsacus scoliodocus Ij., n. var. retroscissus, described: Topsent (54). 
Chaunangium, characters of n. g., p. 138 ; C. crater F. E. S., n. sp., 
described, pp. 31-33 ; C. sp., F. E. S., described, pp. 33, 34 : Schulze 
(43). 
Placopegma^ characters of genus, p. 137 ; P. soliUuyn F. E. S., redescribed, 
pp. 28-31 : Schulze (43). 
Family RosSELLiD^. 
Diagnosis of the family, subdivided into Lanuginellince, Rossellinm^ and 
Acanthascince : Ijima (24) pp. 1, 2 ; Schulze (43) pp. 175, 176. 
RosselUnce, diagnosis of sub-family and key to genera: Ijima (24) pp. 16 
-19 ; Schulze (43) p. 176. 
Lanuginellinoe, diagnosis of sub-family and key to genera and species : 
Ijima (24) pp. 2, 3 ; Schulze (43) p. 176. 
Acanthascince, diagnosis of sub -family, general organization and key to 
genera : Ijima (24) pp. 127-139; Schulze (43) p. 177. 
Acanthascus F. E. S., diagnosis of genus with key to species, pp. 139, 
140 ; A. cactus F. E. S., redescribed, pp. 140-158 ; A. alani Ij., 
redescribed, pp. 158-162 : Ijima (24). 
Asconema setuhalensc. S. K., redescribed : Topsent (50) p. 41. 
Aulosaccus Ij., diagnosis of genus with key to species, pp. 107-110 ; A . 
mitsukurii Ij., redescribed, pp. 117-127; A. schulzei Ij., redescribed, 
pp. 110-117 : Ijima (24). 
Bathydorus levis spinosus, n. subsp., diagnosed and described : Wilson 
(60) pp. 51-54. 
Boloso7iia, nom. nov., substituted for Placosoma : IjimA (24) p. 305. 
Crateromorpha J. E. Gray, diagnosis of genus and key to species, pp. 55- 
57 ; G. meyeri J. E. G., redescribed with descriptions of two new sub- 
species G. m. tuberosa Ij., n. subsp. and C. m. rugosa Ij., n. subsp., 
pp. 57-74: ; G. pachyactina Ij., redescribed, pp. 74-78 ; G. corrugata 
Ij., redescribed, pp. 78-86 : Ijima (24). 
Hycdascus Ij., diagnosis of genus and key to species, pp. 87, 88 ; H. 
sagamiensis Ij., redescribed, 88-96 ; H. giganteus Ij., redescribed, 
pp. 100-107 ; H. similis, n. sp., described, pp. 96-100 : Ijima (24). 
Lanuginella pupa 0. S., redescribed : Ijima (24) pp. 3-16, pi. i. 
Rhahdocalyptus F. E. S., diagnosis of genus and key to species, pp. 236- 
238 ; R. victor Ij., redescribed, pp. 238-253 ; R. imguiculatus, n. sp., 
described, pp. 268-276 ; R. capillatus Ij., redescribed, pp. 276-291 ; 
R. mollis F. E. S., redescribed, pp. 253-268 : Ijima (24).— i^., 
characters of genus, p. 140 ; R. haculifer F. E. S., n. sp., described, 
pp. 34-36 : Schulze (43). 
Scyphidium F. E. S., diagnosis of genus and key to species, pp. 20, 21 ; 
8. namiyei, n. nom. for Vitrollula namiyei Ij., redescribed, pp. 32-37 ; 
S. longispina, n. nom. for Rossella longispina Ij., redescribed, pp. 22- 
31 : Ijima (24). 
Staurocalyptus Ij., diagnosis of genus and key to species, pp. 162-168 ; 
S. roeperi F. E. S., redescribed, pp. 168-172 ; !S. dovMngi L. M. L., 
redescribed, pp. 172-175 ; S. tiihidosus, n. sp., described, pp. 175-180; 
S. ajijiis, n. sp., described, pp. 180-191 ; S. entacant/ius, n. sp., 
described, pp. 191-202 ; S. heteractinus Ij., redescribed, pp. 218-222 ; 
S. pleorhaphides Ij., redescribed, pp. 222-230 ; S. (sj). "?), described, 
pp. 231-236 ; S. microchetus Ij., redescribed, pp. 202-206 ; ;S^. glaher Ij., 
