44 
PACIFIC SCIENCE, VoL XV, January 1961 
fleshy. Colour in life greenish to chocolate brown 
(Munsell, rY-R 8/4), in spirit pale brown. 
The skeleton is of stout radiating bundles of 
large subtylostyli, with medium-size and small 
subtylostyli scattered thickly in the choanosome 
and forming a dense subdermal layer. The der- 
mal skeleton is a palisade of mainly small sub- 
tylostyli. 
Fig. 16. a, Polymastia fusca, sp. nov. b, Polymastia 
fusca, subtylostyli (X 350). 
Spicules. Megascleres: subtylostyli of three 
sizes: (a) .64 X .011 mm.; (b) .4 to .48 X .008 
mm.; (c) .14 X .004 mm. 
Polymastia granulosa ( Brpndsted ) 
Polymastia granulosa Brpndsted, 1923, p. 162, 
fig. 36. 
OCCURRENCE: Anawhata, Piha; lower mid- 
littoral. 
REMARKS : Colour bright yellow. 
DISTRIBUTION: Auckland Islands; Subant- 
arctic. 
GENUS Aaptos (Gray) 
Aaptos aaptos (Schmidt) 
Synonymy: See Dendy and Frederick, 1924, 
p. 508. 
OCCURRENCE: Stanley Bay; lower midlittoral. 
REMARKS: Specimens all typically reddish- 
purple externally, brownish-yellow internally. 
DISTRIBUTION: Mediterranean; West Indies; 
Indian Ocean; Malaya; Australia. 
family CLIONIDAE (Gray) 
GENUS Cliona (Grant) 
Cliona celata ( Grant ) 
Cliona celata Grant, 1826, p. 79. 
OCCURRENCE: Point Chevalier; Kawau Island; 
Piha. Midlittoral. 
distribution: Arctic; Atlantic coasts of Eu- 
rope and North America; West Indies; Indian 
Ocean; Malaya; Australia. 
Cliona muscoides (Hancock) 
Cliona muscoides Hancock, 1849, p. 335, pi. 
15, fig. 11. 
OCCURRENCE: Spirits Bay at 4 fathoms. 
REMARKS: The habit of the present specimen, 
especially the appearance of its perforations at 
the surface of the shell, conforms closely with 
