49 



Bionoftlic uioutlis." Query, Wove tlioso protubevanoos ovicells- 

 Fenestt'Ua intcrnata, Lonsdale. Cup-shapeJ ; celluliferoiis 

 surface internal ; branches dichotomous compressed, breadth 

 variable; meshes oblong, narrow ; rows of cells, 2 — 5, divided 

 by longitudinal ridges; transverse connecting pi'ocesses short, 

 without cells ; non-cellular surftice, inner layer sharply fibrous, 

 outer layer minutely graiuilar. 



Fenes'tella Jhssula. Lonsdale. Cup-shaped; celluliferous 

 surface internal ; branches dichotomous, slender ; meshes oval ; 

 rows of cells two ; transverse processes non-cellular ; inner 

 layer of non-celluliferous surface minutely fibrous, external 

 layer smooth or granular. 



Variety a F. dcnsa. Ethcridge.* Of this variety, if it be 

 not a distinct species, Mr. E. says: — "Form of polyzoarium 

 not known, probably cup-shaped, one portion is foliaceous, 

 meshes or fenestrules oval, small, densely arranged upon the 

 expanded coenoecium or polypidom, transverse processes or bars 

 non-cellular. These unsatisfactory casts of Fenestella I refer 

 to Lonsdales species F. fossula. No good characters are left 

 for determination. The transverse processes or bars and the 

 fenestrules are so obscure that any attempt to give definite 

 characters would mislead. It so closely resembles F. fossula 

 from Mount Wellington, Tasmania, and St. Patrick's Plains, 

 New South Wales, that I feel obliged to refer it to that form. 

 Any additional species would only multiply names. I had, 

 however, proposed the name of F. densa for this Queensland 

 specimen. The original habit was probably infundibuliform 

 or cup-shaped ; but whether the bars were rectangularly 

 dichotomous with oval meshes, cannot be distinctly made out. 

 Locality, Gympie, Queensland, Smithfield reef. Form, 

 Devonian. 



It will be seen that the above characters differ from what I 

 have said on the cup- shape which many specimens in the 

 Museum will show to be untenable, and in the transverse bars 

 bearing cells. But as the observations were all apparently 

 made from casts mistakes might easily arise. 



We may now enquire, what are the affinities of the genus 

 Fenestella, or its relations with other genei-a. It cannot 

 strictly speaking, be classed with Eetepora for the reasons I 

 have given. As a slender ligulate polyzoarium strengthened 

 and held together by transverse bars its disassociation from 

 Eetepora is very evident ; and this is plainly seen in the 

 British Devonian species, F. laxa, Lons., where the bars are 

 irregular at rare intervals, and giving rise to interstices of 

 three or four lines square. Among existing polyzoa we have 



• Proceedings of Geological Society, April 24th, 1872, p. 332. 



