ORTMANN : TERTIARY INVERTEBRATES. 69 



Gen. TENNYSONIA Bsk. 

 13. TENNYSONIA SUBCYLINDRICA Ortmann. 



PI. XIII, Fig. s< 6 . 



1900 Tennysonia stibcylindrica Ortmann, in: Amer. Journ. Sci., v. 10, p. 

 370. 



Zoarium stipitate, irregularly branched, branches coalescent and lobate, 

 subcylindrical. Orifices of cells slightly raised above the surface, arranged 

 in straight, uniserial lines, placed only on one side of the branches, and 

 beginning at an imaginary median line on this side. Interspaces between 

 cells and back side of branches with pores (cancelli). 



Remarks: This fossil resembles so much the living and only known spe- 

 cies of the genus, T. stellata Busk (1875, p. 34, pi. 31, f. 6) from the Cape 

 of Good Hope, that it is possibly identical with it. The only differences 

 are : the branches are a little thinner in the fossil form, and subcylindrical, 

 with hardly any indication of a triangular cross section, so that there is no 

 trace of a median ridge on the front part of the branches, and further, the 

 orifices of the cells are slightly raised above the surface, while they are 

 even with it in T. stellata. 



Record of specimens : Mouth of Santa Cruz River ; i colony. 



Gen. HETEROPORA Blv. 

 14. HETEROPORA PELLICULATA Waters. 



PI. XIII, Fig. 6. 

 1879 Heteropora pelliculata Waters, in : Journ. Roy. Micr. Soc., v. 2, p. 



390. pl- 15- 



1879 H. neozelanica Busk, in: Journ. Linn. Soc., v. 14, p. 725, pl. 15, f. 



1-4. 



1880 H. n., Nicholson, in: Ann. Mag. Nat. Hist., ser. 5, v. 6, p. 333, 

 textf. i A, B, C. 



1900 H. pell. Ortmann, in : Amer. Journ. Sci., v. 10, p. 378. 



Zoarium erect, arising from an incrusting base, with short, subcylindri- 

 cal, diverging, dichotomous branches, terminating in blunt, rounded ex- 



