320 n. p. LITTLE PLEISTOCENE GEOLOGY OF WATERVILLE, MAINE 



Cancer cf . irroratus 



GarcUum (Serripes) grwnlandicum . . . . Greenland to Stonington. 



Cardinm n. sp. ( ?) 



Cyclwa sp 



Discinisca cf . atlantica " 



Leda pernula Arctic to Long Island. 



Macoma haltica Maine to Georgia. 



Macoma calcarea Greenland to Stonington. 



Mndiolaria discors Newfoundland to Connecticut. 



My a arenaria Arctic to Florida. 



Mya truncata 



Mytilus edulis Arctic to North Carolina. 



Natica clausa Grand Manan to Cape Cod. 



Ncptunea despecta tornata Off Georges Bank. 



NuGuIa tenuis Arctic to Hatteras. 



Peeten islandieus Greenland to Connecticut. 



Pecten (Amusium) n. sp? 



Polyniccs granlandica Cape Cod northward. 



Poli/nicrs heros Labrador to Virginia. 



Haxhcava arctiea Arctic to West Indies. 



i^pirorhis nautiloides 



Trk'hdtropis Jjorealis Cape Cod northward. 



Yoldla {PortJandia) ylaeialis Greenland. 



Clap23, quoting Packard and Looiiiis, mentions Nucula expansa and 

 Perpusa lapilhis as also occurring in Waterville. Many of the above, on 

 the otlier hand, have not previously been recognized from this locality. 



The commonest fossil forms at \^'aterville are Macoma haltica, Macoma 

 calcarea, Mytilus edulis, Sa.ricava arctiea, and Tricliotropis horealis. 

 Viewing the fauna as a whole, cold water species are tlie most numerous 

 and a few far northern forms are present. The bulk of the fossil forms 

 still exist off the N'ew England coast. Those that are very common today 

 along the Maine coast are Balanus crenatus, Macoma calcarea, Mya are- 

 naria, Mytilus edulis, Nucula ienais, Folynices lieros. Saxicava arctiea, 

 a J id Tricliotropis horealis. 



'I'he upper fossiliferous layer of menil)er 1 is at times in a black, very 

 plastic clay with much vegetable matter, which gives it a putrid odor. 

 In connection with this layer have been obtained a few leaves representing, 

 according to Professor Berry, Populus balsamifera. Ilex verticillata, Gay- 

 lussacia dumosa, and Vaccinium corymhosum. These are all species that 

 still live in this area. x\ll have a rather wide range, and the only char- 

 acteristic northern plant is the Populus, which reaches its southern limit 

 in Maine at the present time. On the other hand, tlie Vaccinium extends 

 as far south as A^irginia, and the Gaylussacia and Tlex reacli northern 



"^ Found only at locality G, and the only species found tliei'o. 



