10 NEW ZEALAND PALiEONTOLOGY. 



irregularly cup-shaped. Costa distinct, covered with small 

 spiniform granules^ and corresponding with the septa. Systems 

 six, with four cycles irregular and incomplete. Fourth and fifth 

 orders uniting to the tertiaries in front of its palus, about two- 

 thirds of the distance to the columella. Pali in front of every 

 cycle but the last. But these and other details are not certain, 

 as the only specimen is much damaged and obscured by matrix. 

 Alt. 12, major axis 15, minor 13 millim. This specimen was 

 fastened to a card with a Flahellum, and numbered in the Ap- 

 pendix Of£. Cat. 40, p. 38. It is from Oamaru, horizon 

 unknown. Fig. 5. 



The following species will now be included in the new 

 genus : — 



N. viola =Turbinolia viola (mihi) and 1^18.=^ Caryophy Ilia 

 viola (Duncan), loc. cit.^Deltocyathus viola (mihi), Proc. Roy. 

 Soc. N. S. Wales, 1877, p. 191. 



N. excisus=^ Sphenotrochus excisus (Duncan), Quart. Jour. 

 Geol. Soc, 1870, p. 298= Deltocyathus excisus (mihi), Proc. 

 Roy. Soc. N. S. Wales, 1877, p. 192. 



N. aldingensis {mihi) = Del tocy at M<s aiding ensis , Trans, and 

 Proc. Philos. Soc. Adelaide, 1877, p. 107. 



N. tateanus=^Deltocyathus tateanus (mihi), Proc. Adelaide 

 Phil. Soc, loc. cit. 



N. alatus=Deltocyathus alatus (mihi), loc. cit., p. 108. 



Sub-family — Turbinolin^. Genus — Sphenotrochus. M.-Ed. 



and Haime. 



Simple free corals, without epitheca, and with a lamelliform 

 columella. 



This genus is only distinguished from Placotrochus by the 

 absence of epitheca, which is a feature certainly not of generic 

 value. It will be for future palseontologists to decide which of 

 the genera we should retain. The fossils classified thus are all 

 Eocene or Miocene, with very few existing forms — two or three 

 at most. W^e have one in Australia; and the fossil representa- 

 tives in the Tertiary formations of Australia are two, one of 

 which is existing. The Sphenotrochus excisus of Duncan is a 

 worn Notocyathus. 



Sphenotrochus huttonianus, n. s. Corallum small, cup- 

 shaped, terminating in a fine point. There is no scar, and the 

 coral was free. Epitheca (?) . A white calcareous encrustation 



