SYSTEMATIC. 
J$'pong. 27 
C. HEXACTINELLIDA. 
(i) LYSSACINA. 
Family Euplectellida;. 
Euplectella Owen, summary of the organization and characters of the 
genus, pp. 37—57 ; key to the thirteen known species, p. 58; 
E. aspergillum Owen, its affinities, p. 83; E. curvistellata , n. sp., 
from southern coast of the Province of Satsma in Kyushu, Japan, 
100-142 m., pp. 217-219, 2 text-figg.; E. imperialis lj., from Sagami 
Sea, etc., Japan, 365-1002 m., redescribed, p. 24 and pp. 59-85, pis. 
i & ii; E. marshalli Ij., from Sagami Sea, etc., 133-292 m., redescribed, 
p. 24, and pp. 86-201, pis. iii-v: affinities, p. 200; E. oweni Herkl. 
and Marsh., from Kyushu or from the neighbourhood of that island, 
particularly the waters of the Corean Channel to the North West of 
it, redescribed, pp. 202-216, pi. vi; E. regalis F. E. S., its affinities, 
p. 83; Ijima (29). 
Hyalodendron navalium Moore, a synonym of Walteria leuckarti ; the 
creation of a new genus to receive the species is inadmissible ; Ijima 
(29) p. 29. 
Malacosaccus Jloricomatus , n. sp., from east of the Azores, 5005 meters 
depth, a species exceptional amongst Euplectelliclce , both as regards 
form, and in details of spiculation ; Topsent (58) pp. 448-455. 
Regadrella O. S.; genus diagnosed, its characters and affinities discussed, 
and key to the three species given, pp. 220-223; Li. decora E. E. S., a 
synonym of Li. okinoseana Ij., pp. 248-250; R. komeyamai , n. sp., 
from Sagami Sea, locality unknown, pp. 252-264, pi. ix & x, figg. 5-17; 
R. okinoseana Ij., from the Sagami Sea, 358 to 832 m., redescribed : 
includes R. decora F. E. S., 1900, from Indian Ocean, pp. 223-251, 
pis. vii & viii; R. phoenix O. S., from coast of Chile, 3200 in., redescribed: 
includes Trichaptella elegans Eilhol and Rhabdodictyum delicatum 
Topsent, pp. 265-277, pi. x, figg. 18-27, pi. xi; Ijima (29). 
Rhabdodictyum delicatum Topsent, a synonym of Regadrella phoenix ; 
Ijima (29) p. 265. 
Taegeria pulchra F. E. S., notes on the coronal wreath ; Ijima (29) p. 253. 
Trichaptella elegans Filhol, a synonym of Regadrella phoenix ; Ijima (29) 
p. 265. 
Walteria F. E. S., diagnosis of the genus and differential characters of 
the two species, W. leuckarti Ij. and IF. flemmingi F. E. S., p. 278; 
W. leuckarti Ij., from Sagami Sea, 500-1000 m., redescribed : includes 
Hyalodendron navalium Moore, pp. 279-293, pis. xii & xiii ; Ijima 
(29). 
Family Asconematid.e. 
Caulopliacus sp., perhaps C. elegans F. E. S., from Antarctic, described; 
Topsent (60) pp. 31 & 32 and p. 7, pi. i, fig. 6: Topsent (561 p. 4. 
Family ROSSELLIDAI. 
Acanthascus cactus F. E. S., p. 24; Ijima (29). 
Bathydorus spinosus F. E. S., from Antarctic; Topsent (60) p. 36 and 
p. 7, pi. i, fig. 1: Topsent (56) p. 6. 
Chaunoplectella cavernosa Ij. ; Ijima (29), p. 25. 
Leucopsacus orthodocus Ij., development of the larvse ; Ijima (29), pp. 
162 & 163, 187 & 188, 193 footnote, 246 footnote. 
