258 Transactions.— Zoology. 
Genus Thuiaria, Fleming. 
Hydrosoma variously branched. Hydrothecz biserial, adnate, or imbedded 
in the substance of the stem and branches. 
THUIARIA ARTICULATA, 
S. articulata, Pall., Hlench. 137% T. articulata, Johnst., “Brit. Zooph.,” p. 84 4 
Hydrosoma thick, erect, pinnately branched ; branches alternate ; pale 
brown. Hydrothece alternate, ovato-tubular, slightly curved; aperture 
truncated, entire. Ovarian cells — ? not seen. 
Lyall Bay. (F.W.H.) A single specimen only. 
3 THUIARIA ZEALANDICA. 
T. zealandica, Gray, l.c., II. 214, 
“ Pale brown; erect, branches oppositely pinnate. Hydrothece small, 
exactly opposite, triangular ; aperture truncated, with a small central tooth.” 
New Zealand. (Dr. Sinclair.) I have seen no specimens. 
Genus Antennularia, Lamark. 
Hydrosoma variously branched ; branches clothed with hair-like verti- 
cillate branchlets. Hydrothece small, sessile, campanulate, unilateral. 
ANTENNULARIA ANTENNINA. 
S. antennina, Linn., Syst. 1310. A. antennina, Johnst., “ Brit. Zooph.,” p. 86. 
Hydrosoma strong, erect, sub-pinnately branched ; branchlets numerous. 
Hydrothecee with intermediate cellules. Ovarian cells — ? 
Lyall Bay. (F.W.H.) A single specimen only. 
Genus Plumularia, Lamark. 
Hydrosoma simple or branched, the branches pinnate ; hydrothece small, 
sessile, unilateral. 
PLUMULARIA PENNATULA. 
S. pennatula, Ell. &Sol., Zooph.,56. P. pennatula, Johnst., “Brit. Zooph.,” p. 94. 
Hydrosoma simple, or sparingly branched, formed by a single tube; 
branches alternately closely pinnate ; brown or reddish-brown. Hydrothecee 
approximated, seated in the axil of a long incurved spine ; aperture unequally 
erenated. Ovarian cells large, sub-cylindrical, stalked, with numerous trans- 
verse strongly denticulated ribs, situated on the inner side of the branches. 
Lyall Bay. (F.W.H.) Common. 
