SYSTEMATIC. 
Spong. 15 
Family LeucopsaCIM). 
Leucopsacidce , characters of family with list of genera, p. 175 : Schulze 
(43). 
Leucopsacus scoliodocus lj., 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. solutum F. E. S., redescribed, 
pp. 28-31 : Schulze (43). 
Family Rossellid^e. 
Diagnosis of the family, subdivided into Lanuginellince , Rossellince , and 
Acanthascince : Ijima (24) pp. 1, 2 ; Schulze (43) pp. 175, 176. 
Rossellince , diagnosis of sub-family and key to genera : Ijima (24) pp. 16 
-19 ; Schulze (43) p. 176. 
Lanuginellince , diagnosis of sub-family and key to genera and species : 
Ltima (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 setubalense 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. 
Bolosoma , nom. nov,* substituted for Placosoma : Ijima (24) p. 305. 
Crater omorpka J. E. Gray, diagnosis of genus and key to spocies, pp. 55- 
57 ; C. meyeri J. E. G., redescribed with descriptions of two new sub- 
species C. m. tuberosa Ij., n. subsp. and C. m. rugosa Ij., n. subsp., 
pp. 57-74 ; C. pachyactina Ij., redescribed, pp. 74-78 ; C. corrugata 
Ij., redescribed, pp. 78-86 : Ijima (24). 
Hyalascus Ij., diagnosis of genus and key to species, pp. 87, 88 ; II. 
sagamiensis Ij., redescribed, 88-96 ; II. 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. 
Rhabdocalyptus F. E. S., diagnosis of genus and key to species, pp. 236- 
238 ; R. victor Ij., redescribed, pp. 238-253 ; R. unguiculalus, n. sp., 
described, pp. 268-276 ; R. capillatus Ij., redescribed, pp. 276-291 ; 
R. mollis F. E. S., redescribed, pp. 253-268 : Ijima (24). — It., 
characters of genus, p. 140 ; R. baculifer 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 ; 
S. 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 . rceperi F. E. S., redescribed, pp. 168-172 ; 8. dowlingi L. M. L., 
redescribed, pp. 172-175 ; S. tubulosus, n. sp., described, pp. 175-180 ; 
8. affi?iis , n. sp., described, pp. 180-191 ; 8. entacanthus , n. sp., 
described, pp. 191-202 ; S. hcteractinus Ij., redescribed, pp. 218-222 ; 
8. pleorhaphides Ij., redescribed, pp. 222-230 ; S. (sp. ?), described, 
pp. 231-236 ; S. microchetus Ij., redescribed, pp. 202-206 ; S. glaber Ij., 
