276 PEOE. ALLMAK ON NEW GENEEA 



near the middle of the hydrotheca, and running transversely from 

 its posterior to its anterior wall ; median nematophore adnate to 

 front of the hydrotheca nearly as far as the margin, and then pro- 

 jected as a free beak-like process, which is provided with a lateral 

 as well as terminal orifice ; lateral nematophores slightly over- 

 topping the hydrotheca ; cauline nematophores broad, two on 

 each internode, one being situated immediately below, and the 

 other immediately above the supporting process for the pinna. 



Gonosome. None present in the specimen. 



Locality. New Zealand, Mr. BusFs collection. 



The length of the pinna-bearing internodes, and consequent in- 

 tervals between the pinnae are unusually great in this species ; 

 and the plumes thus present a rather open habit, which contrasts 

 with the denser plumes of others. The hydrothecal internodes 

 have three distinct diaphragms — one which is a continuation of 

 the intrathecal ridge, one at the base of the lateral nematophores, 

 and one at the base of the hydrotheca. 



In the absence of all knowledge of the gonosome, the reference 

 of the present species to the genus Aglaophenia is only provi- 

 sional. It will be seen that in the possession of two orifices by 

 the free portion of the mesial nematophore we have a character 

 which Kirchenpauer assigns to his subgenus Macrorynchia. This, 

 however, is by no means an exclusive character of the forms 

 which he would include under Macrorynchia (see description given 

 above o? Aglaophenia acanthocarpa) , while the general form of the 

 hydrotheca in the present species agrees more closely with that 

 of the true AglaophenicB. 



The specimen was growing over the surface of a litoral fucus. 



Halicornaeia, Busk (modified). 



Trophosome. Hydrocaulus with pinnate ramification, Hydro- 

 thecse usually Avith an intrathecal ridge. Nematophores fixed ; 

 mesial nematophore adnate for a greater or less extent to the 

 front of the hydrotheca, rarely free. 



Gonosome. Gronangia not included in corbulse or protected by 

 gonangial ramuli, but carried on the common stem, or on more 

 or less modified hydrothecal pinnae. 



The genus Salicornaria was originally instituted by Busk to 

 include certain Plumulariidse, in which the reproductive capsules 

 were not included in basket-like receptacles or corbulae. Within 

 its original limits it would have included the species referable to 



