THE ANNALS 



MAGAZINE OF NATURAL HISTORY. 



[FIFTH SERIES.] 

 No. 99. MARCH 1886. 



XVI. — On the Tasmanian and Australian Species of the 

 Genus Stenopora, Lonsdale. Bj H. Alleyne Nicholson, 

 M.D., D.Sc, Regius Professor of Natural History in the 

 University of Aberdeen, and Robert Etheridge, Jun. 



[Plates III, & IV,] 



Some years ago the present writers gave an account of the 

 structure of the corallum in the genus Stenopora^ Lonsd. 

 (Ann. & Mag. Nat. Hist. 1879, vol. iv. p. 265), In the 

 same memoir two species of the genus were described and 

 figured, one of these being identified (erroneously, as it 

 proves) with 8. ovuta^ Lonsd,, while the second was charac- 

 terized as new under the name of 8. Jachii. Having now 

 had the opportunity of examining in greater detail the collec- 

 tion of Stenoporoi in the British Museum, and also some 

 interesting specimens which have been submitted to us by 

 our friend Mr. R. L, Jack, we propose on the present occa- 

 sion to shortly characterize all the well-defined species of the 

 genus whicli are known to us as occurring in Tasmania and 

 Australia. 



8ienopora ovata^ Lonsdale. (PI. III. figs. 1-4.) 



Stenopora ovata, Lonsd., in Dar-«in's Geol. Obs, Vole, Islands, p. 163 

 (1844), and in Strzelecki's Physical tDescription of New South 

 Wales, p, 263, pi. liii. figs. 3 a, 3 b (1845). 



(Non Stenopora ovata, Nich. & Eth., Jun., Ann, & Mag, Nat. Hist. 1879, 

 vol. iv. p. 274 ) 



Ann. & Mag, N. Hist. Ser, 5. Vol. xvii, 13 



