114 Prof. Allman on new Sj)ecies of 



Sertularella unilateralism n. sp. 



Trophosome. Hydrocaulus about 1^ inch in height, alter- 

 nately pinnate, monosiphonic. Hyclrothecfe deep, divergent, 

 and somewhat tumid below, slightly curving towards the stem 

 above, strongly 4-tootlied, all deflected towards one side of the 

 stem and branches. 



Gonosome. Gonangia arising just below the base of a liydro- 

 theca, ovoid, with a 4-toothed terminal orifice ; distal portion 

 wuth wide annulations, which become obsolete towards the 

 proximal end. 



Hob. Swain's Bay [Eaton). 



Sertularella lagena, n. sp. 



Trophosome. Hydrocaulus springing from a creeping stolon, 

 about 1 inch high, slightly branched ; internodes much atten- 

 uated towards their proximal ends, where they are also marked 

 with two or three oblique well-defined annulations. Hydro- 

 theca? rather distant, borne by the internode close to its distal 

 end, tumid below, becoming narrow towards the distinctly 

 4-toothed orifice. 



Gonosome not known. 



Hah, Observatory Bay, Royal Sound [Eaton). 



Genus HALECiUiAr, Oken. 



Halecium inutilum, n. sp. 



Trophosome. Hydrocaulus about 1 inch in height, irregularly 

 branched, tlie branches witli two or three oblique annulations 

 at their origin ; internodes short, each carrying close to its 

 distal end, for the support of the hydranth, a bracket-shaped 

 process which is not produced into a tube (in this respect it 

 resembles H. macrocepkalus^ x4.11man, and //. sessilisy Norman, 

 which are also without the usual tubular prolongation), and is 

 surrounded by a narrow, slightly everted punctate margin. 



Gonosome not known. 



Hob. Observatory Bay [Eaton). 



? Genus Campanularia, Lam. (restrict.). 

 Oamjyanularia cylindrica, n. sp. 



Trophosome. Hydroid about | inch high ; peduncles spring- 

 ing from a creeping filiform stolon, each with several annula- 

 tions at its pi'oximal end, followed by a slightly corrugated 

 space, which is succeeded by a single globular annulation 

 bearing the hydrotheca. Ilydrotheca? deep, cylindrical, with 

 the margin deeply and strongly 12-toothed. 



