100 The Genera of the Plwinulariidce, 



I have also observed tliat the hydrotheca which occupies 

 the first internode of each nematocladium has one of its 

 supracalycine sarcotliecse (that nearest the rachis) much 

 smaller than the other, sometimes almost rudimentary. In 

 the structure and position of the intrathecal ridge this 

 species agrees with A. Huxley i. 



Though some of the forms which I have assigned to this 

 species differ considerably from each other, I cannot find 

 definite grounds for separating any of them unless the 

 gonosomes should prove different. The remarkable varia- 

 tion in the direction of the lateral sarcothecge must have 

 presented itself in Mr. Busk's specimens, since he describes 

 them as free and projecting, while in some of his sketches 

 they are shown erect and adnate. The fact that they are 

 frequently directed towards the back of the pinna no cloubt 

 accounts for the similar direction of those on the nemato- 

 cladia, and it is to be observed that this backward direction 

 obtains in the nematocladia of Professor Allman's speci- 

 mens, and also in that from Port Darwin, though in each of 

 these instances the supracalycine sarcothecse are, for the 

 most part, nearly erect and adnate. 



The pinnately-disposed branches resemble those of A. 

 divaricata in having the proximal part free from hydro- 

 cladia, and provided with a median series of sarcothecse. 



Kirchenpauer's A. rostrata is, I believe, the same as this 

 species ; also a Plumularian figured by Mr. Hincks in the 

 Fopular Science Revieiu for July, 1874. 



Aglaophenia Lendenfeldi, n. sp. 



{A. Kirchenpauri, Lend.) 



I propose the above name for the species described by 

 Dr. von Lendenfeld as A. Kirchenioduri, the latter name 

 belonging properly to another species — the Plumularia 

 Kirchenpauri of Heller (Zoophyten und Echinodermen des 

 Adriatischen Meeres). The description of A. Lendenfeldi, 

 with full illustrations, will be found in the Proceedings 

 of the Linnean Society of New South Wales, Vol. IX., 

 Part 3. 



Halicoenaria ascidioides, Bale. 



I have omitted to mention in the " Catalogue" the locality 

 in which this species was found — namely, QueensclifF. 



