Sfiidies in Problematic Orj^auistns. 73 



27. F. nilsoiiiaiuis, n. sp. — Caulcrpa scplentrionalis Ag., 

 and F. imbricalus Stern. 



28. F. l)rarclii, n. sp. — Carpolit/ics hcmlocinns (?) Schloth. 



29. F. orbignianus, Br. 



X. Species that do not appear to belong to any of the 

 preceding. 



30. F. agardhianus, Br. 



^Doubtful species. 



31. F. pectinatus, n. sp. — Carpolithcs (f) and Algacites 

 orobiformis Schloth. 



32. F. turbinatus, Br. 



33. F. discophorus, Br. 



34. F. lyngliianus, n. sp. 



35. F. (?) cylindricus, Stern. 



36. F. circinatus, n. sp. 



It will be observed from this list that the type of the genus, 

 F. striciusy is placed under the second section, FuciTES, by 

 itself. In putting it here Brongniart .says that it resembles in 

 its general form Fiicus obhisatus, but differs essentially in a 

 large and thick nerve that traverses the frond ; furthermore, 

 that it is really more like a solid axis than a real nerve. 

 There are various other differences. A comparison is also 

 made with a species of Rhodomela, but it is finally stated that 

 the fossil differs from all living species known to the author. 



(P- 53-) 



This fossil is, in all probability, the remains of a plant ;* and 

 in view of this fact, and because the genus contains species that 

 have been referred to various genera, it seems best to return 

 to the original name, restrict the genus to the one species 

 and call it Fucoides strictus Brongniart. (PI. Ill, Fig. 2.) 

 Of the remainder of the species, there are but six which 

 call for any special attention here. They are : 



F. targonii. F. furcatus. 



difformis. antiquus. 



recurvus. circinatus. 



*This plant seems to be the same as Goeppert's species Haliserites dechenianus. 

 Certainly the figures correspond almost exactly, and specimens of Goeppert's 

 species would very readily pass for Brongniart's Fucoides strictus. It seems, 

 therefore, best to the author to reduce Goeppert's name to a synonym of F. strictus. 

 Should this be done, it will necessitate a change in certain new varieties and 

 species made by Peuhallow in the paper cited above. 



