204 



GEOLOGY OF THE NARRAGAKSETT BASIK 



Lesquerenx, is peculiarly rich in species of Odontopteris. As yet the upper 

 portion of the Coal Measures, from near the base of the Dighton group 

 upward in the northern field, has afforded httle or no evidence. From the 

 list of localities which appear to have been visited in collecting the fossils 

 in Lesquereux's hst it is possible to draw conclusions of some value regard- 

 ing the flora so far as it is known. 



The localities, so far as the Providence quadrangle is concerned, are 

 practically limited to the exposures which occur in the lower half of the 

 series of sandstones and shales of the Coal Measures, or to essentially the 

 same range as the insect fauna. Lesquereux^ concluded from these plants 

 that the Rhode Island Coal Measures were equivalent to the beds of the 

 upper Carboniferous in Pennsylvania. Until the flora of the uppermost 

 members of the period in this basin is known nothing further can be said 

 regarding their Permian affinities. (See also pp. 170, 181,) 



List of plants identified "by Leo Lesquereux? 



Species 



Locality. 



1. Peoopteris dentata Brgt 



Pawtucket. 



Valley Falls. 



Pawtucket. 



Pawtucket. 



Pawtucket. 



Pawtucket. 



Pawtucket. 



Pawtucket. 



Valley Falls. 



Valley Falls. 



Valley Falls. 



Pawtucket. 



Pawtucket. 



Pawtucket. 



Pawtucket. 



Pawtucket. 



Pawtucket. 



Pawtucket. 



Pawtucket. 



Pawtucket. 



Pawtucket. 



Bristol. 



Pawtucket. 



Pawtucket. 

 Pawtucket. 



? 



2. Sphenopteris (Hymenopliyllites) furcata 



3. Splieuophyllum oblongifolium 



4, Dictyopteris scheuchzerif 



5. Odontopteris stielilerian -.- 



6. reich^ana 



7. var. latifolia 



8. neuropteroides .,.^.. 



9. Neuropteris decipiens 



10. Goniopteris (Pecopteris) unita .., 



11. Pecopteris lepidorachis 



12. Asterophyllites equisetlformis 



13. Pecopteris miltoui 



14. ScMzopteris (Rhacophylliim) trlchomanoides , ., 



15. Oligocarpia gutbieri ..^ 



16. Spbenopteris lanceolata. 



17. Odontopteris bairdii ,-.., . 



18. Pecopteris bemiteloides , 



19. miltoni (same as 13) 



20. abbreviata 



21. arborescens 



22. Pseudopecopteris dimorpba . . , 



23. Odontopteris cornuta 



24. Parallel narrow raobises of piun» of Ko. 7, mostly 

 deprived of leaves 



25. Neuropteris dentata 



26. Odonopteris obtusiloba? 





^Am. Jour. Sci., 3d series. Vol, XXXVII, 1889, p. 411. 

 nbid.,p.229„ 



