Coughtrey. — Notes on the Neio Zealaiid Hydroidea?. 281 



Art. XLII. — Notes on the New Zealand Hydroideae. 



By Millen Coughtrey. 



Plate XX. 



[Read before the Otago Institute, 28th May, 1874.] 



The following notes may be of use to co-workers in this department of 



zoology. 



The pleasure derived from the study of these creatures has more than 



repaid me for the labour expended on them, and I trust the following 



descriptions, accompanied by the illustrations, may lead others to enjoy the 



same pleasure. 



Many friends have assisted me in obtaining material, none more so than 



W 



with 



gathered during healthy and enjoyable rambles, have been carefully compared 

 with one another, and with the original descriptions. Several new species 

 have been added, some old ones have been reduced to varieties, and the 

 descriptions of the remaining species amplified wherever it seemed to me 



necessary 



The works at my command have been : 



Sertularians 



Inst., Vol. V., 1872. 



Johnston's British Zoophytes, Vols. 1 and 2. 

 Gray's Catalogue in DiefFenbach's New Zealand. 

 Monograph on Gymnoblastic Hydroids, by Professor Allman. 

 I regret the absence of Hincks 1 British Hydroid Zoophytes. 



Sub-order — Sertularid^:. 



"Hydrosoma fixed plant-like, horny, variously branched; polypites 

 hydraform, sessile, protected by hydrothecse, and connected by a caenosarc, 



terminal ; reproductive organs contained in horny deciduous cells 



never 



scattered over the hydrosoma." Medusoids always fixed 



Genus Sertularia, 



Sertularia johnstonii 



widely distributed species does not agree with Sertularia rugosa, 

 nor with S. pataqonica, D'Orbigny. In the description given by 



and 



followin 



Hydrophyton lax and delicate; hydrocaulis spreading dichotomously 



Brit. Zooph., Vol. I, p. 164. 



Ll 



