22 Dr. M, Couglitrey 07i New-Zealand Hydvoida. 



EXPLANATION OF PLATES I. & II. 



Fig. 1. Terehraiulina ? Davidsoni, R. Etheridge, jun-, natural size. Ter- 

 tiary Coralline Limestone, Mount Gambier, S. Australia. 



a, view of ventral valve ; b, view of dorsal valve and foramen of 

 ventral valve ; c, interior of dorsal valve. 



Fig. 2. Waldheimia Garibaldiana, Davidson, natural size. Tertiary Co- 

 ralline Limestone, Mount Gambler, S. A. a, ventral valve ; 



b, dorsal valve and foramen of ventral valve. 



Mg. 3. TF. Taylori, R. Etheridge, jun., natural size. Tertiary Coralline 

 Limestone of the Murray-River Clifis, S. A. a, ventral valve ; 



5, dorsal valve, with the groove indicating the position of the 

 septum, and the foramen of the ventral valve ; c, lateral view of 

 both valves. 



Fig. 4. W. gambiercnsis, R. Etheridge, jun., natural size. Tertiary Co- 

 ralline Limestone of Moimt Gambler, S. A. a, view of ventral 

 valve ; b, dorsal valve and foramen of ventral valve ; c, lateral 

 view of both valves ; d, view of sinuate front margin. (The 

 figure 4 a is partially restored on the left-hand side, the shelly 

 matter being there broken away.) 



Fig. 5. TerehrateUa cojnpta, G. B. Sowerby. Tertiary Coralline Lime- 

 stone of Mount Gambler, S. A. a, view of ventral valve ; 



6, view of dorsal valve and foramen of ventral valve, both en- 

 larged one and a half times ; c, interior of ventral valve ; d, in- 

 terior of dorsal valve, showing the dilated portion of the mesial 

 septum : the two latter figures are of the natural size. 



Figs. S a,b, c are from drawings kindly made for me by the 

 late Mr. C. R. Bone, of the Museum of Practical Geology, shortly 

 before his death ; for the remainder I am indebted to the artistic 

 skill of my friend Mr. B. N. Peach (of the Geological Survey of 

 Scotland). 



III. — Critical Notes on the New-Zealand Hydroida, Suborder 

 Thecaphora. By MiLLEN CoUGHTREY, M.B., CM. Edinb. 

 Univ., Hon. Fellow Historic Soc. Lane. & dies., President 

 of the Dunedin Naturalists Field-Club, N.Z., &c. &c. 



[Plate III.] 



To the last volume (no. vii.) of the ' Transactions of the 

 New-Zealand Institute I contributed a paper on the New- 

 Zealand Hydroida*, in which I gave the results of an ex- 

 amination of the type specimens of Capt. F. W. Hutton's 

 paper on the New-Zealand Sertularians f, and of several new 

 specimens I obtained on the New-Zealand coasts. Contrary 

 to my usual practice, and with many misgivings on my part, 

 these notes were rather prematurely published ; and I regret 

 now that I did not hold them back until I had more works of 



* Vol. vii. pp. 281-293, plate xx. 

 t Trans. N.Z. Inst. vol. v. 1872. 



