110 REPORT OF THE 



land." I cannot, however, detect any radiating- pimples. 

 This form also resembles A. regularis (Owen, Rep. Iowa, &c, 

 Tab. V. Fig. 13). 



Localities — Grand Rapids, Chebo}~ong Creek. 



204. Allorisma, sp? 



The umbones almost overhang the anterior extremity. 



Localities — Grand Rapids, Cheboyong Creek. 

 206. Allorisma, sp ? 



Very gibbous, umbones sharp, incurved, overhanging the 

 anterior extremity. 



Localities — Grand Rapids, Cheboyong Creek. 



205. Nucula? sp ? 



Perhaps an Allorisma or Myalina; very obscure. 



Locality — Grand Rapids. 



231. Nucula? sp? 



Locality — Cheboyong Creek. 



230. Myalina lamellosa (?), DeKoninck. 



The beak is rather too much recurved, and the surface too 

 smooth, for this species. It has some resemblance to II. 

 Swallovi, McChesney (Op. cit., p. 5t), from the coal measures. 



Locality — Grand Rapids. 



GASTEROPODA. 



Remains of Euomphaloid casts have been found at Grand 

 Rapids. Very complete coiled shells have been met with 

 at Bellevue, in Eaton county, but I have not been fortunate 

 enough to secure any. 



TRILOEITES. 



254. Phillipsia, sp ? 



Fragments of tails, resembling P. Brogniarti, Fischer (De 

 Kon. Op. cit., PI. LIII, Fig. 1). 



Locality — Grand Rapids. 



255. Phillipsia, sp? 



Fragments of two tuberculated taiks. 



Localities — Grand Rapids. From Great Charity Island isja 

 portion of a head which may belong to the same species. 



FISHES. 



Remains of spines and Psammodus-like teeth have been met 

 with at various localities. 



