IGO Annals of the Carnegie Museum. 



Monotrypa fructiosa Hall . 



111. Dev. Foss., pi. XXXVIII, figs. 1-5, 1876. 

 The bryozoan known by this name, which is given no standing by 

 Nickles and Bassler, is very abundant in the present material. It 

 occurs also at Eighteen Mile Creek. 

 Monotrypa ? sp. 



With the above is another more slender species which seems to be 

 congeneric with it. It is also common. 

 Fenestella e ma data Hall. 



36 Ann. Rept. N. Y. State Mus. Nat. Hist., p. 68, 41 Rept. 

 idem, pi. VIII. 

 This species, which is quite common in the Demissa bed at Eigh- 

 teen Mile Creek, is common also in our material. 

 Reteporitia striata Hall. 



36 Ann. Rept. N. Y. State Mus. Nat. Hist., p. 72. 

 This is another species which occurs both in the Dcinissa bed at 

 Eighteen Mile Creek and in our faunule. It is rare in both. 

 Is try pa S]). 



A few well preserved fronds which appear to belong to this genus 

 occur with the other Fenestellidc^. 

 Hemitrypa crihosa Hall. 



Trans. Albany Institute, p. 177. 

 Specimens which appear to belong to this species occur occasionally 

 in the material. 



Poly pora fistii lata Hall. 



36 Ann. Rept. N. Y. State Mus., p. 59. 

 There are a few specimens which seem to agree with the figures and 

 descriptions of this species. It does not occur in any of the sections 

 we are comparing our faunule with, but has been reported from Genes- 

 see and Erie Counties, N. Y. and West Williams, Ontario. 

 Poly pora multiplex Hall. 



Rept. N. Y. State Geol., 1886, p. 66. 

 This species is common in the upper part of the Hamilton at 

 Livonia, and in our faunule, and occurs rarely at Cayuga Lake above 

 the Encrinal. 



Rhombopora tortalinea Hall. 



Pal. N. Y., Vol. VI, p. 180, pi. LVI. 

 This species occurs rarely in our material. 



