58 



lanceolate, elongate-spathulate, or linear-lanceolate, and in 

 rudimentary forms, frequently wide, inequilateral, oblique, 

 and subtrigonal. In all forms there is a gradual tapering 

 towards the base to a linear strap-shaped petiole, which is 

 more or less amplexicaul ; no mid-rib; nerves numerous, 

 distinct, ascending from base, and from the crowded mid-rib- 

 like central series, at a very acute angle to the margin, but 

 never anastomosing. The central series become less crowded 

 towards middle, and, towards apex, the central series spread 

 out and diverge symmetrically as in the lateral series. 



This genus— evidently a tufted form — comes near to 

 gangamopteris in all characteristics, from which it is distin- 

 guished by the total absence of nerve anastomoses. 



So far 'as known this genus is confined to the Upper 

 Mesozoic coal measures, and occurs commonly in the upper 

 eoal measure shales at Mount Nicholas and Spring Bay. 



Strzeleckia gangamopteroides. (Nov. sp. Figs. 5-7.) 



Frond simple, variable, possessing all the characteristics of 

 the genus, save that it is never linear, as in the following 

 species. 



Mature form generally broadest above the middle j apex 

 obtusely pointed. Greatest length from 4 to 4| inches ; 

 greatest breadth, about three-quarters of an inch. Lateral or 

 oblique rudimentary forms; greatest length, 2£ inches; 

 greatest breadth (middle), £ inch, 



Locality, Mount Nicholas coal measures, Tasmania, 

 (common) . 



In Plate 26, Fig. 2, " Geology of Tasmania," I referred a 

 doubtful form to Pecopteris caudata (Mihi), but the speci- 

 mens thus referred to did not show the neuration clearly. I 

 am now confident that it should be referred to 8. gangamop- 

 teroides. 



Strzelechia tenuifolia. (Nov. sp. Fig. 8.) 



Form simple, almost symmetrical, elongate, linear-lance- 

 olate ; apex obtusely accuminate, very gently narrowing to a 

 long attenuate, and' slightly oblique petiole. Nerves distinct, 

 not so crowded as in the preceding species (S. gangamop- 

 teroides), ascending acutely to margin. 



Greatest length 4| to 44 inches, greatest breadth -J- inch. _ 

 Locality, Mount Nicholas coal measures, Tasmania, 

 (common). 



Sphenopteris Morrisiana, (Nov. sp. Figs. 14, 15.) 



Frond large (imperfect), bi-pinnate, deltoid, or lanceolate- 

 deltoid, probably 2 to 3 feet long in completed state, and 

 about 8 or 9 inches across towards base ; stipe, rounded and 



