paleontology: eastern MASSACHUSETTS. 89 



tion to these, imperfect specimens of Iphidea, Stenotheca, and 

 other forms have been found. 



2. MILL COVE, NORTH WEYMOUTH. 



Boute. -By train. Old Colony branch, N. Y., N. H. & H. railroad, Knee- 

 land street station, to Weymouth Heij;hts, fourteen miles ; single fare, $.25. 

 Or, by train (same station) to Quincy, thence by electrics or bicycle to 

 Weymouth Heiglits. Walk north and northwestward around border 

 of Mill cove. See p. 26. 



The rocks exposed here are red sandy slates and calcareous 

 strata with some white limestone beds. Fossils are scarce. Some 

 obscure traces of Hyolithes have been found, however ; and trilo- 

 bite remains, probably of the genus Agraulus, have been noticed. 

 (Ciosby.) 



3. NORTH ATTLEBOROUGH. 



Route. — By train, from N. Y., N. H. & H. railroad, ParK square station, 

 to North Attleborough; fare §.75. Take electrics at Nortli Attleborough 

 square for South Attleborough, stopping about half-way where, from the 

 apex of a triangle made by the roads, a road leads west to Hoppin hill. 

 In the center* of the triangle is a house, which will serve as a landmark. 

 Follow Hoppin hill road to foot of hill, where it crosses a small brook. 

 Shaler and Foerste's locality 1 is just to the right of the road on the 

 banks of the brook. Locality 2 is farther up the brook. 



The Cambrian slates exposed here are much disturbed, and in- 

 volved in a rather complicated series of folds. Nevertheless the 

 fossil-bearing strata are not affected very strongly, and the remains 

 are mostly in a good condition. Hyolithes is the predominating 

 fossil, five species having been described by Shaler and Foerste. 

 Hyolithellus and Salterella also occur. The rocks in places 

 are made up of the shells of the Hyolithes ; and wherever the 

 surface is weathered, rather perfect specimens may be obtained. 

 In the more shaly portion of the rock, the shells have frequently a 

 dark color which causes them to appear prominently on the broken 

 surfaces. Trilobites are represented in these slates by the 

 genera Microdiscus, Olenellus, Agraulus and Ptychoparia. The 

 gastropoda include a Scenella, several species of Stenotheca, a 

 Platyceras and a Raphistoma. The occurrence of pelecypods is 

 doubtful, but brachiopods are represented by two species of 

 Obolella, 0. erana and 0. atlantica. (For descriptions and illus- 

 trations of this fauna see paper by Shaler and Foerste noted 

 below.) 



