370 O. Feistmantel — Contributions towards the [No. 4<, 



There are a good many genera which to a great extent have living 

 analogies, and those sometimes very close. 



In Schimper's ' Palaeontologie vegetale,' p. 737, we find the whole 

 sequence of genera which at that time were known ; 15 genera being 

 enumerated. 



Of these two occur in our Eaniganj Series. 



But to Schimper's list must be added, Gangamopteris, McCoy, first 

 described as Cyclopteris, but having also a net-venation. 



To this genus belongs also that fossil from the Talchir which until 

 recently was generally quoted as Cyclopteris, but which lately I described 

 as Gangamopteris cyclopteroides ; of this genus I will describe another 

 sjDecies in this present paper. 



Genus Belemnopteris, nov. 



Fronde simpliei late sagittaefoliosa pedunculated Nervis primariis 

 trihus, medio crassiore, ceteris anastomosantibus. 



Amongst Mr. Wood-Mason's specimens are two, of which one is 

 tolerably complete and has an arrow-like shape, with 3 chief veins, one 

 stronger passing into the leaf, two others a little thinner into the two 

 basal lobes ; the other venation is netted. 



It strongly reminds one of some living ferns. 



1. First we have Gymno gramme sagiitata* a Polypodiaceae which 

 formerly was described as Semionitis sagittata, Fee., with which the 

 Hemionitis cordata, Hook, and Grev. (Semionitis cordifolia, Roxb.),t is 

 identical ; of this later Mr. Kurz has lent me specimens from Dacca. 



With this fern our fossil has little more than the sbape of the leaf and 

 perhaps also the primary veins in common, while in the net -venation the two 

 are rather different. 



2. There is another fern with which our fossil can be compared, 

 especially as regards the net-venation : this is Pteris sagittaefolia, Raddi % ; 

 this fern is narrower than ours, but the disposition of the 3 primary veins, 

 and the net- venation particularly, agree well with the same in our fern. 



Of course, only the fructification can decide to which of these two 

 our fossils should be placed, but as none is to be seen and as our fern cannot 

 be identified with either, on the contrary, presents characters of both, I 

 consider myself justified in establishing a new genus. 



It is of very great interest (1st) as it is a form so closely allied to 

 living ones, and (2nd) as it is a fern with a net-venation. 



* See Ettingshausen, Farrenkrauterder Jetztwelt, etc., 1865, p. 59, PI. XXXI, f. 9. 

 t See Beddome, Indian ferns (of South India), PI. LII. p. 18 ; also Lowe, Ferns, 

 etc., Vol. VII, PI. XXXVIII, p. 93. 



% Ettingshausen, 1. c, p. 104, PL LXXI. f. 3. 



