306 " ENDEAVOUR " SCIENTIFIC RESULTS. 



it has a broad bhint termination ; at each angle of this, and 

 visible in the lateral view, is a very small elliptic orifice, and 

 these orifices are united by a transverse slit crossing the 

 end of the sarcothecse. All the sarcothecse are of similar 

 form, and in the laterals especially the terminal apertures 

 are commonly so minute as to be indistinguishable under a 

 low power. The lateral orifices are circular and distinct. 

 These two species are among the few Statopleans in which 

 the anterior sarcothecse are not quite in contact with the 

 hydrotheca. Many of the most recently formed hydrothecae, 

 though otherwise complete, are without a trace of the septal 

 ridges in the internodes, which develop gradually, becoming, 

 in the older portions, completely annular. 



C (?) bathyzonatus, as described by Ritchie, seems a much 

 more compact form. The distance between two hydrocladia 

 (on the same side) is said to be about one mm., in C. multi- 

 septata it is about 7 mm. In C. (?) bathyzonatus there are 

 one, or more usually two, sarcothecse between two hydro- 

 cladia ; in the present species there are about 9-12. These 

 figures refer in both cases to the distal parts of the colonies ; 

 the lower part of the cladate tube of Ritchie's species is said 

 to be destitute of hydrocladia, the corresponding portion of 

 C. multiseptata is also bare, but only because it has been 

 deduded. C (?) bathyzonatus seems to be more distinctly 

 polysiphonic in habit, and its hydrocladia apparently have 

 not the markedly secund disposition found in the species 

 before us. 



Loc. — Thirty-eight miles north-east of North Reef, Capri- 

 corn Group, off Port Curtis, Queensland, 74 fathoms. 



Genus Aglaophenia, Lamouroux. 



Of the species referred in this Report to the genus Aglao- 

 phenia, A. divaricata and A. decumbens are evidently nearly 

 related, so far as can be ascertained in the absence of the 

 gonosome of the latter, which will probably prove to be, 

 like that of A. divaricata, furnished with separate narrow 

 ribs, armed with two series of sarcothecse, and unprovided 

 with hydro thee se ; A. hillardi, A. tasmanica, and A. dannevigi 

 belong to what may be termed the crucialis group, possessing 

 large closed corbulse, without hydro thecse ; A. cupressina has 

 affinities with the same group, but stands alone in some 

 respects ; A. megalocarpa, A. armata, A. calycifera, and A. 

 tenuissima have the corbulse closed, but with hydrothecse 

 on the leaflets, and therefore belong to the genus Thecocarpus 

 of some authors (but not of Nutting) ; and A. carinifera 

 probably belongs to the same group. 



