288 Transactions. — Zoology. 



phyton is attached, sending brandies upwards at intervals and many anchoring 

 threads downwards. 



Hydrothecse sub-opposite and alternate ; tubular and curved ; smooth, lips 

 dentate ; teeth, two small ones internally, which are acute ; two indistinct 

 ones laterally, which are depressed. 



Gonangia pedicellate, obovate with strong cross ribs arranged in a monili- 

 form manner, a distinct neck, mouth with everted lips. 



Allied to Th. articulata, Johnst., Brit. Zooph., p. 84, but differs from it 

 in toothed aperture of hydrothecse and ribbed gonangia. This species is 

 identical with Thuiaria articulata of Captain Hutton, which species Captain 

 Hutton himself noted as being doubtful. 



Jlahitat. — Sometimes in long feathery branches springing from a shell, in 

 others short stunted branches from an extensive network of hydrorhiza. 

 Above description was taken from a specimen sent down to Otago Museum by 

 Dr. Fleming, of Oamaru. I have since obtained it in large quantity on 

 Timaru beach, but scanty on southern coast of New Zealand, so far as I have 

 been. Figs. 32—34. 



" Thuiaria zealandica. 



" T. zealandica, Gray. Dieffenbach's New Zealand, II., 214. 



*' Pale brown, erect, branches oppositely pinnate. Hydro thecse small, 

 exactly opposite, triangular ; aperture truncated, with a small central tooth. 

 * New Zealand (Dr. Sinclair.) ' " 



Neither Captain Hutton nor I have seen any specimens. 



Genus Antennularia, Lamarck. 

 " Hydrophyton variously branched, branches clothed with hair-like verti- 

 cillate branchlets. Hydrothecse small, sessile, campanulate, unilateral. 



Antennularia antennina, Hutton. 



S. antennina, Linn., Syst., 1310. 



A. antennina, Johnst., Brit. Zooph., p. 8G. 



" Hydrophyton strong, erect, sub-pinnately branched." 



Branches not jointed as in British specimen, but filiformly wrinkled, and 

 chief hydrocaulis springs from " a sponge-like mass composed of numerous 

 implexed tubular fibres." Branchlets numerous and jointed, bending towards 

 the branch. Hydrotheca) small campanulate with an even rim, with two or 

 three intermediate cellules. Gonangia 1 



The above description is chiefly a compound of Captain Hutton's and Dr. 

 Johnston's, ])oth of which I have compared with the specimens ; in my 

 'specimens the branches are not jointed but distinctly wrinkled as above stated^ 

 thus differing from Dr. Johnston's description. 



Fig. 3G is after Johnston j fig. 35 is original. 



