290 " ENDEAVOUR " SCIENTIFIC RESULTS. 



a striking resemblance to that of the gonangium of Orthopyxis 

 wilsoni, Bale.^ Nutting also refers to this similarity to the 

 gonangia of some of the Campanularians. 



From this type the gonangia of S. lata differ in every 

 character. In the first place the bilateral development is 

 conspicuous, the gonangia having distinct dorsal and ventral 

 aspects, the latter of which is directed inward. From a 

 little above the middle the gonangium tapers gradually to 

 the peduncle ; it is also narrowed upwards, but in a less 

 degree, and the narrowing at this part is mostly on the 

 dorsal side, which is continued upward considerably higher 

 than the ventral, and at the summit rounded over to the 

 oblique concave termination, which is thus contracted at 

 the dorsal border, but little or not at all in front. There 

 is nothing in any way resembling the plicated condition 

 found in the other species, but on the other hand there are 

 regular transverse undulations (generally more pronounced 

 than I have figured them), which are strongest at the dorsum, 

 and become shallower towards the venter, where they are 

 often not traceable. The gonangia are not erect on the 

 pinnse, but lie along them, with the venter almost appressed 

 to them. 



The pinnae are usually long, attaining about three-quarters 

 of an inch, and narrow at the point of origin. The distal 

 intemodes often bear only three hydrothecse, but very rarely 

 less. The hydrothecse have four shallow emarginations ; the 

 intermediate points are usually distinct at the sides, but less 

 pronounced above and below. The aperture is nearly vertical 

 in typical specimens, in others somewhat less so. The 

 terminal hydrotheca in each intemode has the aperture 

 directed slightly more upward than the others. 



Locs. — Off St. Francis Island, Great Australian Bight, 30 

 fathoms. 



Great Australian Bight, 80-120 fathoms and 130-190 

 fathoms. 



Sertularella adpressa, Ritchie. 



SertulareUa adpressa, Ritchie, Mem. Austr. Mus., iv., 16, 

 1911, p. 837, pi. Ixxxv., fig. 5, pi. Ixxxviii., figs. 1,2, 9. 

 Id., Briggs, Rec. Austr. Mus., x., 10, 1914, p. 291, pi. 

 XXV., fig. 2. 



This species has been fully described by Ritchie, and the 

 present specimens, for the most part, answer perfectly to the 



1. Bale — Proc. Roy. Soc. Vict., (n.s.), xxvii., pi. xii., fig. 5. 



