262 Transactions. 
stem, each taking the place of a hydrocladium. — Hydrocladia close, alter- 
nate, = about 45°, one on each internode, both series directed a little 
forwa 
Nodes at an angle of about 40°, deep, widened upward from 
base; a very narrow intrathecal ridge near base on adcauline side, with 
a fold from it crossing hydrotheca and curving slightly forward ; spera 
with short anterior tooth, above which the front is produced 
somewhat longer point; lateral teeth 4 on each side, the first and fourth 
very minute, often obsolete, second and third nearly triangular, shallow 
back adnate. Internode with short septal ridges opposite the ‘crate 
ridge and the bases of the lateral sarcothecae. 
Mesial sarcotheca a little shorter than calycle, and mainly rising from 
it, tapering, canaliculate. Lateral sarcothecae tubular, adnate to hydro- 
theca nearly to margin and then bent forward, canaliculate. — Cauline 
sarcothecae canaliculate, two at base of each елады $the lower 
projecting forward, the other larger, projecting outwar 
Fie. 16.—Thecocarpus chiltoni n. sp. x 80. 
Gonangial pinna replacing a hydrocladium, with the first two inter- 
oam bearing hydrothecae. Corbula curved, rather short, consisting 0 
‚ originati as narrow pinnules but 
ыл гоа: did 
odified hydrotheca with lateral sarcothecae. 
Loc.—Cape Maria van Diemen, ten miles north- west, 50 fathoms 
(Chilton). 
The specimen has two main stems, айы about 8 їп. in length, and 
about 8 mm 
eter at base, clothed almost down to base wit 
branches, which reach about 3 in. in length, and are alternate, the 
average е between successive branches on the same side being about 
7 ing all in one plane, the colony somewhat resembles that of 
