'278 Proceedings of the Royal Physical Society. 



Qls. — The above imperfect characters are derived from 

 numerous casts occurring in the fossiliferous and feruginous 

 sandstone nodules of Coral Creek, and notwithstanding their 

 brevity, will, I think, enable the form to be recognised, its 

 characters are so prominent and marked. 



The fenestrules are smaller than in typical specimens of 

 P. ampla (Lonsdale), but the increased interstitial surface 

 separating the circular fenestrules gives to P. Koninckii a 

 very marked appearance, which is still further increased by 

 the large extent of the curled and crumpled infundibuliform 

 frond, with its numerous ramifications displayed to great 

 advantage in the nodular matrix in which it is entombed. 



Unfortunately for a proper illustration of the species, I am 

 at present only acquainted with casts, and whenever any 

 trace of the cells is left, it is always the hexagonal or poly- 

 gonal bases, with the basal plate worn oft". 



From amongst the other species which Professor De Koninck 

 indicates as belonging to Protoretepora, the present one may 

 be distinguished thus : From P. {Polypora) Halliana (Prout) * 

 by identically the same points which separate it from P. 

 am/pla (Lonsdale), only in a more marked degree, and from 

 P. (Polypora) Ramiltonensisf by the generally enlarged con- 

 dition of all the characters in P. Koninckii, as compared with 

 those of the last named. 



Log. and Horizon. — Coral Creek, below Sonoma road-cross- 

 ing, Bowen Eiver coalfield, in a decomposed nodular iron- 

 stone, associated with Stenopora and numerous other fossils 

 (Marine Series, Nos. 77, 80, 85, 98, 123, etc.). 



Collector. — R. L. Jack, Esq. 



Protoretepora, sp. ind. 



(Compare P. (Fenestella) ampla (Lonsdale), in Strzelecki's "Phys. Descrip. 

 N. S. Wales," etc., 1845, p. 268, t. 9, f. S-^d, and more particularly De 

 Koninck's figs., Foss. Pal. Nouv-Galles du Sud., 1877, pt. 3, t. 8, f. 5-5c.) 



Ql)s. — Of equal frequency with the last is another form, 

 the second referred to in the introductory remarks on the 

 Polyzoa, having more or less the character and appearance of 



* Illinois Geol. Survey Eeport, ii., t. 21, f. 4 and ia, b. 

 t Ibid.y ii., f. 6 and 6a. 



