— 559 — 
The Cardiocarpa in general are regarded as belonging to the 
Cordaitales ; and certain, oval or orbicwar forms among them with 
narrow sarcotestal borders that have been definitely correlated with 
Cordaites are known as Cardiocarpon. The Samaropsis type is 
supposed to be especially proper to the .Dory-Cordaites groups. The 
various forms of Cardioca.pon or Samaropsis that have been found 
in the lower Gondwana flora are considered by most paleobotanists 
as probably belonging to Noeggerathiopsis In my remarks on the 
genus Arberia I have suggested that Cardiocarpon (Samaropsts) 
Seixvast, described balow, may be referable to Gangamopteris which 
I regard as Pteridospermic. 
It is,in my judgment, highly probable that not all of the seeds 
described under the above generic name belong to the Cordaitales ; 
but that some, at least, of them nisy have been born by Cycado- 
filicate types. 
Gangamopteris (Samaropsis) Seixasi n- sp. 
Pl. x, figs. 50 8 
Nucellus low, conver, finely and irregularly rugose-striate, ovate 
to oval, or rarely elliptical, averaging 8-10 mm inlength, and 6 mm 
tn width, distinctly apiculate, sometimes acuminate, and slightly 
cuneately narrowed basally tolhe broad truncate line of detachment 
which equals about one third the maximum transverse diameter, 
near the middle, of the nucelius itself; sclerotest thin, 25.6 mim in 
width along the border in the flattened specimens, narrowest in the 
upper part, widest at the base, often very clearly defined; sarcotest 
probably of little thickness, dilated laterally throughout the entire 
lenght of the nucellus to form a thin, very finely lineate wing that is 
somewhat variable in form, 2.4mmin width on either side, usually 
narrowest a little below the middle. whence it descends along the 
nucieus and often for a little distance below it to the line of separation , 
and generally broadest toward the apex where it is prolonged on 
either side in a very broadly angular lobe which hooks slightly inward 
toward the very wide-angled open apical sinus. 
The seeds described above are scattered in great profusion in 
the plant bed northeast of Minas, where they are associated so inti- 
mately with the leaves of Gangamopteris obobvatu that they appear 
