164 PEOCEEDINGS OF THE GEOLOGICAL SOCIETY. [DeC. 20, 



vascular points obscure ; leaves linear, acute, 3 inches or more in 

 length, with a keel and two faint lateral ribs. Cones large, sessile. 

 U. C, Pictou; M. C, Joggins {J. W. D.); M. C, Sydney (B. 

 Brown), 



4. L. PLATTSTiGMA, spec. nov. PI. X. figs. 47 & 48. 



Leaf-bases rhombic, broader than long, little prominent; scars 

 rhombic, oval, acuminate, slightly emarginate above; vascular 

 points two, approximate or confluent. 



M. C, Sydney {B, Brown) ; Joggins (J. W. D.). 



5. L. TETEAGONTTS, SpCC. DOV. PI. X. fig. 49. 



Leaf-bases square, furrowed on the sides ; leaf-scar central, with 

 apparently a single central vascular point. 

 M. C, Joggins (J. W. D.). 



DiPLOTEGiuM, Corda. 



Diplotegitim: ketusum, spec. nov. PI. XIII. fig. 102. 



The fragments referable to plants of this genus are imperfect and 

 obscure. The most distinct show leaf-bases ascending obliquely, 

 and terminating by a retuse end with a papilla in the notch. Some 

 less distinct fragments may possibly be imperfectly preserved speci- 

 mens oi Lepidodendron or Lepidojphloios. 



M. C, Joggins (J. W. J).), 



Knoeeia. 



Nearly all the plants referred to this genus in the Carboniferous 

 rocks are, as Goeppert has shown, imperfectly preserved stems of 

 Lepidodendron. In the Lower Coal-formation many such Knorria 

 forms are afforded by L. corrugatum. 



Knoeeia Sellonii, Sternberg. 



This appears different from the ordinary Knorrice ; its supposed 

 leaves may be aerial roots. It has a large pith-cylinder with very 

 distant tabular floors, like Sternbergia. 



M. C, Sydney {B. Brown). 



CoEDAiTEs, linger. (Ptchnophtlltjm, Brongn.) 



1. CoEDAiTES boeassifolia, Corda. 



M. C, Pictou (H. Poole); Grand Lake ((7. F. Ilartt); Sydney 

 {B. Brown) ; Joggins, Onslow {J. W. D.) ; Bay de Chaleur 

 {Logan). 



Yery abundant in the Middle Coal-formation. 



2. C. SIMPLEX, spec. nov. 



Leaves similar to the last in size and form, but with simple, equal, 

 parallel nerves. It may be a variety, but is characteristic of the 

 Upper Coal-formation. 



M. C, Grand Eiver (C. F. Hartt) ; U. C, Pictou {J. W, D.). 



