XVII. SPONGIiE. 
[1904] 
24 Spong , 
Sollasella hystrix T., redescribed : Topsent (50) pp. 142, 143. 
Syringella humilis T., described, p. 138 ; S. falcifera T., redescribed, 
pp. 138, 139 : Topsent (50). 
Tragosia infundibuliformis T. polypoides : Mar. Biol. Ass. (34). 
Family Pcecilosclerim:. 
Aoarnus tortilis T., redescribed : Topsent (50) p. 171. 
Artemisina erecta , n. sp., described : Topsent (50) pp. 214, 215. 
Biemma rosea (Fristedt) L., redescribed, pp. 226, 227 ; B. grimaldii T., 
redescribed, pp. 227, 228 : Topsent (50). 
Bubaris vermiculata (Bowerbank) G., redescribed, pp. 145, 146 ; B. masto- 
phora (Schmidt) T., redescribed, p. 146 ; B. sosia , n. sp., described, 
p. 147 : Topsent (50). 
Gerbaris T., definition of genus, p. 160 ; G. torquata T., redescribed, 
pp. 160, 161 : Topsent (50). 
Ghondrocladia guiteli, n. sp., described : Topsent (50) pp. 207-209. 
Dendoryx dentata , n. sp., described : Topsent (50) pp. 172, 173. 
Desmacella inornata B., redescribed : Topsent (50) pp. 225, 226. 
Desmaddon peltatus , n. sp., described, p. 204 ; D. abyssi, n. sp., described, 
pp. 204, 205 : Topsent (50). 
Dragmatyle , n. g., defined, p. 195 ; D. lictor , n. sp., described, p. 195 : 
Topsent (50). 
Esperia stepanowi , E. irregularis, E. muscoides , E.contarenii , E. for aminosa, 
E. dubia : Sowinsky (46) p. 289. 
Esperella fasdfibula, n. sp., described, p. 201 ; E. tunicata (Schmidt) V., 
redescribed, pp. 200, 201 : Topsent (50). — E. cegagropila, bionomics : 
CUENOT (7). 
Esperiopsis villosa C., redescribed, pp. 211, 212 ; E. decora , n. sp., 
described, p. 212 ; E. preedita T., redescribed, p. 212 ; E. glomeds , 
n. sp., described, pp. 213, 214 : Topsent (50). 
Forcepia C., definition of genus, p. 177 ; F. bulbosa (Carter) V., re- 
described, pp. 179, 180 ; F, imperfecta , n. sp., described, p. 180 : 
Topsent (50). 
Guitarra voluta , n. sp., described : Topsent (50) pp. 209-211. 
Hamacantha johnsoni (Bowerbank) G., redescribed, pp. 215-217 ; H. 
schmidti (Carter) L., redescribed, pp. 217, 218 ; H. carted , n. sp., 
described, pp. 218-220 ; H. lundbecki , n. sp., described, pp. 220, 221 ; 
H. implicans L., n. var. azorica , redescribed, pp. 221, 222 ; H. 
Integra , n. sp., described, pp. 222, 223 ; H. claviscepta T., redescribed, 
pp. 223, 224 : Topsent (50). 
Heterocluthria hallezi , n. g., described : Topsent (50). 
Hymeraphia B., definition of genus, p. 161 ; II. clavata B., redescribed, 
p. 161 ; II. viridis T., redescribed, p. 162 ; II. spinispinosa , n. sp., 
described, p. 162 ; H. ajfinis T., redescribed, p. 163 ; H. pilosella , 
n. sp., described, pp. 163, 164 ; H. hispidula , n. sp., described, pp. 164, 
165 ; H. mucronata , n. sp., described, pp. 166, 166; H.peachi (Bower- 
bank) T., redescribed, p. 166 ; II. mutabilis , n. sp., described, pp. 167, 
168 : Topsent (50). 
Hymerhabdia T., definition of genus, p. 159; II. oxytrunca , n. sp., de- 
scribed, pp. 159, 160: Topsent (50). 
Hymetrochota , n. g., definition of genus, p. 168 ; H. rotula , n. sp., described, 
p. 168 : Topsent (50). 
lophon lamella , n. sp., diagnosed and described, pp. 146-149; I. lamella 
indivisus , n. subsp., diagnosed and described, pp. 149-151 ; I. inden- 
tatus, n. sp., diagnosed and described, pp. 151-154 ; I. chelifer ostia- 
magna , n. subsp., diagnosis and description, pp. 143-146: Wilson 
(60). 
