PACIFIC SCIENCE, VoL XV, January 1961 
34 
FlG. L a, Ircinia novae zealandiae, sp. nov. b, Dy- 
sidea cristagalli, sp. oov. 
order HAPLOSCLERINA (Topsent) 
family HALICLONIDAE (de Laubenfels) 
GENUS Haliclona (Grant) 
Halicloma isodictyale, sp. nov. 
Fig. 2a, b 
OCCURRENCE: Waitawa Bay, Clevedon, 31/ 
10/35 (coll L. B. Moore) . Waitawa Bay, Cleve- 
don, 2/10/58. Point Chevalier Reef, 6/7/57. 
DESCRIPTION: This sponge is an encrusting 
form with a maximum thickness of 3 mm. Its 
surface is minutely shaggy and hispid. The 
oscules are apical on tubular processes, as is 
characteristic of many haliclonids. The texture 
is soft and friable. In life the colour is pale 
cream, in spirit pale brownish-white. The skele- 
ton is a subregularly-isodictyal reticulation, 
mainly unispicular. 
Spicules . Megascleres: oxea .13 mm. X .007 
mm. Microscleres: absent. 
Haliclona tenacior , sp. nov. 
Fig. 3 a, b 
OCCURRENCE: Waitawa Bay, Clevedon, on 
rocks or seaweed. Rangitoto, on rocks. 
DESCRIPTION: An encrusting to irregularly 
massive sponge infested with commensal poly • 
chaete worms. Its surface is uneven, minutely 
and irregularly subpapillose. Oscula are few and 
inconspicuous. Texture is firm and friable. The 
colour in life is dirty-muddy cream, in spirit 
Fig. 2. a, Haliclona isodictyale, sp. nov. b, Hali- 
clona isodictyale, typical oxea (X 350). 
