BKYOZOA FROM S.W. VICTORIA, AUSTRALIA. 



321 



can be made a basis of generic classification ; and perhaps at some time 

 the geological record may show us that jointed forms are all derived 

 from unjointed ones. 



Log. Living, widely distributed. Fossil : Mount Gambier, com- 

 mon ; arid also from the Miocene and Pliocene of Europe ; but as we 

 caunot be quite sure from the descriptions of Reuss and others that 

 Salicornaria farciminoides does not include other species, it is best 

 to refrain from giving localities. 



10. Cellaria malvijstensis, Busk. Plate XIV. fig. 3. 



Salicornaria malvinensis, Busk, Mar. Poly. p. 18, pi. lxiii. figs. 1, 2. 



The zoarium is about the same size as Cellaria jistulosa, fig. 1; 

 sometimes the cells are hexagonal, at others more acute above and 

 below ; an acute avicularium replaces a zocecium. The front of the 

 zocecium is very much depressed, being surrounded by a raised bor- 

 der : distal edge of the oral aperture rounded, contracted above, so 

 as to suggest a subtriangular shape ; proximal edge curved inwards, 

 with a small tooth at each side. 



Log. Living : Falkland Island, South Patagonia {Darwin). Fossil : 

 Mount Gambier, common (Lond. Geol. Soc. coll. Eth. coll.). 



11. Cellaria ovicellosa, Stol. Plate XIY. figs. 4, 5, 6 : Plate 

 XYII. fig. 62. 



Salicornaria ovicellosa, Stol. Foss. Bry. Orak. p. 151, pi. xx. 

 figs. 9, 10. 



From Yarra-Yarra I have several small fragments ; and in some 

 there is a rim round the cell, as figured by Stoliczka, and in others 

 it is plain, as in fig. 4. The most interesting specimen is one in the 

 possession of Miss Jelly (fig. 62), which shows the great range of 

 variation and the great difficulty in determining species on the 

 characters generally used — as, for instance, the mouth varies in posi- 

 tion in the fertile and unfertile cells, and the zoarium, in this case, 

 is quite thin (as in fig. 4) in the upper and lower parts ; but in the 

 middle the diameter is more than twice as great, and in this 

 thicker part, where the cells are fertile, there are very large acute 

 raised avicularia above the zocecium, occupying nearly as much 

 space as the zocecium. Fig. 5 shows the position of the distal 

 rosette plates, which are not quite in the centre of the zoarium. 

 Fig. 6 shows the two lateral plates on each wall. 



This is evidently very closely related to Cellaria tenuirostris 

 (especially var. a) of Busk, from Bass's Strait, Tasmania, Florida, 

 &c. ; but it differs in having the upper part of the avicularium much 

 projecting, and the rim is regular instead of being raised at the two 

 sides. 



Loc. Orakei Bay, New Zealand (St.); Mount Gambier (Lond. 

 Geol. Soc. coll.). 



12. Cellaria globulosa, sp. nov. Plate XIY. figs. 16, 17. 



Zoarium consisting of joints, from the top of which arise two 

 similar joints connected with the first by corneous tubes ; internodes 



