274 CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



(S.) Alveolites vallorum, Meek. 



Ah-eoli/es vaNo7-um, Meek. 1868. Trans. Chicago Ac. 8c., vol. I., p. 86, pi. xi, fig. 9. 

 " " Rominger. 1876. Geol. Surv. Michigan, Foss. Corals, p. 41, 



pi. xvii, fig. 3. 



Lake Winnipegosis, from the basal beds of the Upper Devonian at the 

 north end of Snake Island (one specimen) ; also, from the Stringocephalus 

 zone at three localities on the south-west side of Dawson Bay (two or 

 three specimens from each), and on three small islands in the southern 

 portion of Dawson Bay (a few specimens from eacli) ; J. B. Tyrrell, 1 S89. 



The specimens of ^1. 'oalloriun from the Hay, Mackenzie and Peace 

 Rivers referred to on page 207, have the outer surface of the corallum 

 well preserved, but the structure of the interior of the corallites is more 

 or less obliterated by crystallization, the corallites being completely tilled 

 with matrix. In the specimens from Lake Winnipegosis, however, which 

 do not occur in sliale, but in ii compact or vesicular dolomite, the exte- 

 rior of the c(;rallum is not so well pi-eserved, but the corallites are nearly 

 free from the matrix throughout their length. The corallites are laterally 

 compressed, and their apertures vary in outline from narrowly elongated 

 or somewhat cresoentic to polygonal, and in their greatest diameter from 

 half ii millimetre to a millimetre and a half. The septal spines are well 

 developed, but apparently very fragile. As many as from six to eight 

 rows of these can be counted, though with difficulty, but there do not 

 appear to be ever as many as twelve rows, as thei'e are said to be in A. 

 sqiiavionus. The tabuke are complete and ofter rather regularly disposed. 

 Of the lateral or marginal nniral pores, about ten can be counted in the 

 space of iive millimetres. 



HYDROMEDUS.yE. 



HYDROIDA. 



(S.) Stromatopora. Sp. 



(Cfr. Htroiiiatopora BiicheHensix, Bargatzky, sp.) 



Cauii-opora Bii.rhe/ieii.-<i-s, IJargatzky. 1881. Die Stromatoporen dcs Rhein.sohen 



Devons, p. 62. 

 Si romalopoi'a BmlidiiMnix, Nicholson. 1880. Mon. Brit. Stroniatoporoids, Pt. I, p. 

 23, pi. X, figs. 5-7. 

 Nicholson. 1891. lb., Pt. III., p. 186, pi. xxiii, tigs. 4-7. 



Lake Winnipegosis, on two small islands in Dawson Bay, one on the 

 south-east side of the bay, and the other at its southern end, J. B. 

 Tyrrell, 1889 : a single specimen from each island. 



