140 W. WOODLAND. 
Suberites domuncula, Microciona atrasanguinea, 
Cliona sp. and Hctyon ovoides) and Tetractinellida 
(viz. young portions of Geodia gigas, Corticium cande- 
labrum, Thenea muricata, Stelletta carbonaria, 
and Chondrilla nucula) were obtained partly from 
Naples and partly from Plymouth; the Hexactinellida (viz. 
young portions or buds of Rossella podagrosa, Kpk., 
R. antarctica, Ctr., Anoxycalyx ijimai, Kpk., Anaulo- 
soma schulzei, Kpk., Hyalascus hodgsoni, Kpk., and 
Aulorossella longstaffi, Kpk.) were in greater part 
supplied to me from the British Museum (the ‘ Discovery ” 
material) at the suggestion of R. Kirkpatrick, Hsq.,! and 
by permission of Professor Sir EH. Ray Lankester, and 
the rest (viz. young portions of Huplectella marshalhi, 
Acanthascus cactus, and Crateromorpha meyeri) 
were sent to me at my request by Professor Ijima from 
Tokyo. I wish to thank Sir HE. Ray Lankester, Mr. R. 
Kirkpatrick, and Professor Ijima for so kindly assisting 
me in this essential; I also wish to express my indebtedness 
to Professor Dendy for his ever-ready aid in connection 
with spicule nomenclature, for references to the literature of 
the subject, and for kindly reading over the manuscript of 
this paper. 
HEXACTINELLIDA. 
The scleroblastic formation of hexactinellid spicules has 
hitherto, so far as I know, been studied solely by Ijima (15, 
16) and by Schulze (81), and their results have been included 
in three sumptuous monographs on hexactinellid sponges pub- 
lished in 1901 and 1904. Ijima has described and figured 
several developmental stages of the hexasters and one or two 
other types of hexactinellid spicules in Huplectella mar- 
shalli and Rhabdocalyptus capillatus; Schulze de- 
scribed and figured the scleroplasmic investment of certain 
' Mr. Kirkpatrick has recently published a systematic description of these 
sponges obtained by the National Antarctic Expedition (1). 
