Dr. M. Couglitrey on New-Zealand Hydroida. 29 



has an appearance not unlike the crest of CamjJ. calceolifera, 

 Hincks (Ann. & Mag. Nat. Hist. ser. 4, vol. viii. p. 78). It 

 never attains a greater height than 2 inches. 



Sertularia pumila (sp. nov. to N. 7j.)-= Synthecium gracilis ^ 

 mihi, foe. cit. p. 286, pi. xx. figs. 26-31. 



I am now perfectly satisfied that I was in error when I 

 placed this species under AUraan's genns Synthecium. I have 

 carefully compared it with varieties of S. pumila from the 

 Mersey (Britain) and elsewhere, and cannot detect sufficient 

 specific characters for a new species. 



The differences I observed in the New-Zealand specimens 

 •(as shown in loc. cit. pi. xx. figs. 26 & 27, both magnified to 

 same extent) are present in British sj)ecimens ; and one cha- 

 racter has been observed by Dr. M'Intosh in St.-Andrews 

 specimens, namely presence or absence of joint in the stem 

 (Ann. & Mag. Nat. Hist. ser. 4, vol. xiii. p. 212). 



Sertularia elegans. 



Synthecium elegans, Allman (Gymnoblastic Hydroids). 



Another small specimen has enabled me to confirm my 

 previous identification of this species. It is equally pygmy 

 in size with my first one, and in one of the calycles has 

 the lower three fourths of the peculiar ovarian capsule de- 

 scribed by Prof. Allman. Vide Trans. N.Z. Inst. vol. vii. 

 pi. XX. fig. 25*. 



Genus Hydrallmania. 

 Hydrallmania ? hicalycida^ sp. nov. PI. III. figs. 8, 8', 8'", 9. 



I place this specimen provisionally under the above genus ; 

 but the generic characters would have to be remodelled to 

 admit it. I do not think it can be the Sertularia unilateralis 



* Sertularia ? I lately obtained from tlie Bluff Harbour, just 



below low-water mark, a little specimen resembling in many points 

 S. pimnla, but which I am undecided where to place. The shoots spring 

 from a filiform hydrorhiza. Stems straight, very much thicker than 



{)inn?e ; pinnately branched, pinnae subopposite. Pinnae arise by a pecu- 

 iar joint from stem, like as in PL III. hgs. 7, 7', 7", & 7'". Ilydrothecae 

 opposite, crowded, ensheathing the axis, so that scarcely any interspace 

 is obsei"ved between those on the pinnae, while a large interspace is 

 observable between those on the stems ; hydrothecae short and stout, 

 toothed and operculated ; a small joint between each pair of hvdrotheca;. 

 Vide PI. III. tig. 7. 



