AiistroU,,,,, Hildronls. 89 



.foiiilitioiis of liTuwth. And witli ri'<rai(l i«> A', nt tcuhttn , tin- ihai- 

 acttM-s ascrihed to it seeni hardly suttiiiciit to justify its sprritic- 

 separation. 



Hil<iL'ndorf says that the specimens tiaurcd liy \\\v as E. cam /xnni- 

 laria aic //. hUdhidia (Coutihtrey). Of tliis I am v^ry doul)ff\d. 

 The goiiano-iii of //. hihiliiafd , airoi'din^' to l)oth ('ou<ihtrry and 

 Hilgeiidorf. art' very iinliki' those of the present form. Hilgendorf "s 

 account of //. hildhUitu is not in aeeord witli his figui'e, especially 

 as regards the jieduneles. His specific diagnosis is a copy of All- 

 man's description of //. atiyrfi/dto, including tlie measurement (\ 

 inch), but Pie gives the height afterwards as A inch, which agrees 

 with Coughtrey's. The present species does not, I think, reach 

 more than half that height, and I suspect that //. hildhiatd may 

 be identical with the Xew Zealand form previously leferred to. 

 w^hich has the hydrothecae and hydranths nuich larger than those 

 of 'S'. catnpanularia, and agrees well with Coughtrey's figure. 

 Neither Coughtrey noi- Hilgeiidorf give any indication of the size 



• of the hydrothecae in their specimens. The former, it is true, says 

 that his figures are magnified fifty times, but there is clearly some 

 mistake, as it is obvious to anyone acquainted with some of the 

 species figured that the magnification is not nearly fifty; in s(jme 



• cases, indeed, it is not twenty. 



SiLICtJLARIA UNDULATA (Muld(M- and Tiefiileock). 



Eucnpella nnihdafd, Mulder and Trebilcock. (jeelong Natura- 

 list (2) vi., 1914, p. 10, pi. ii., tigs. 5-7. 

 This appears to be a different species from .S'. cainpanularia. be- 

 ing distinguished by the peduncles and the gonothecae. The 

 former are thin-walled and undulated, as in most of the spLries of 

 Orthopyxiif. though often becoming thicker and smooth at l)oth 

 extremities. According to the figures the base is not conti'acted at 

 the junction with the hydrorhiza, as in S. campan uhiria. The 

 gonothecae are decumbent, i-oughly orbicular in outline. Hat be- 

 neath, convex above, with faint, transverse iviuae. and with a snb- 



• circular aperture, looking upward. The hydiotheeae are similar 

 to those of .S'. campatntlana. 



A figure of the hydranth shows it leaning over the higher lip of 

 the hydrotheca, which is stated to be its position when living; the 

 inflation of the opposite side is noticeable, and the oral calyx and 

 the annulus are also shown. As the latter is described as a large 

 . cup-sliaped proboscis, it would seem that its cliaracter is more dis- 



