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, Cheboyong 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. 



LocalUies — 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 M. 

 Swallom, McChesney (Op. cit., p. 51), 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 T have not been fortunate 

 enough to secure any. 



TRILOBITES. 



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 tuberculate* tails. 



Localities — Grand Rapids. From Great Charity Island is a 

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



FISHES. 



Remains »f spines and Psammodus-like teeth have been met 

 with at various localities. 



