54 CONTRIBUTIONS TO THE GEOLOGY OF MAINE. [bull. 165. 
The following specimens from the Dudley farm, same limestone, 
were collected by Olaf O. Ny lander: 
Fauna of 1415 L. 
1. Atrypa marginalis. 
2. Conchidum knighti (cf . nysius) . 
3. Pentauierus oblongus. 
4. Eatonia medialis var. 
5. Leptsena transversalis. 
6. Spirifer radiatus (— S. nyrnpha Bil- 
lings) . 
7. Nucleospira pisum. 
Littlefield farm, Chapman. — On the Littlefield farm, in Chapman, 
the following species were collected: 
Fauna of 1099 D 6. 
1. Dalmanites limulurus. 
2. Nucleospira pisum. 
3. Stropheodonta varistriata. 
4. ? Cyrtia sp. 
5. Brachiopod's, several minute species. 
6. Corals. 
Two drift bowlders (1095 G and H) picked up by Mr. Olaf O. Nylan- 
der, the one in Fort Fairfield, the other in Presque Isle, contain the 
same fauna, viz: 
Fauna of 1095 G. 
1. Strophomena rhomboidalis. 
2. Atrypa neglecta. 
3. Atrypa (Whitfieldia) nitida. 
Fauna of 1095 H. 
1. Conchidum knighti (cf. nysius) . 
SQUARE LAKE LIMESTONE. 
The Square Lake limestone is a gray fragmental limestone, chiefly 
composed of fragments of corals, crinoids, and more or less perfect 
fossil shells. The outcrop is on the western shore of Square Lake (or 
Sedgwick Lake), one of the chain of larger lakes in northeastern 
Maine. The f ossiliferous locality is small and near water level, on the 
shores of Square Lake, at a position opposite the eastern head of 
Eagle Lake, in the southwestern quarter of T. 16, R. 5. 
The fauna has been collected by several geologists. Specimens of 
the collection made by C. H. Hitchcock and described by E. Billings 
are in the Amherst Geological Museum. But the writer believes, 
from the best information he can obtain, that the types of the descrip- 
tions published in the Proceedings of the Portland Society of Natural 
History were destroyed in the fire which demolished the society's 
building in 1866 (see p. 31). 
The fauna of this particular limestone is clearly distinct from the 
other limestone faunas of Aroostook County at present known (viz, the 
