S/udies ill Prohleinatic Organisms. 



79 



and have experienced many changes. It will only be 

 possible to state accurately the proper name after an investi- 

 gation of the genera. If the principle of nomenclature, 

 which makes it necessary to use the first specific name be 

 followed, there will be many changes in this respect. The 

 list, therefore, as far as the second column goes, is provisional 

 merely. It is believed that the first column is very nearly 

 complete. As already stated, we have restricted the name 

 Fucoidcs to the single species strictus Br., 1822. The genus 

 Gigartinitcs is here used as a generic term for the first time, 

 Brongniart using it only in a sub-generic sense : 



Aphlebia acuta. 

 Chondrites tequalis. 

 Delesserites agardhianus. 

 Arthrophycus alleghaniensis. 

 Gigartinites antiquus. 

 antiquus. 

 Sphterococcites arcuatus. 

 Inorganic. 



Fucoides acutus, Germ, et Kaulf., 1831. 

 aequalis, Br., 1823. 

 agardhianus, Br., 1823. 

 alleghaniensis, Harlan, 1831. 

 antiquus, Br., 1828. 



var. gracilior. His., 1837. 

 arcuatus, Lind., & Hut., 1837. 

 auriformis, Hall, 1843. 

 beaumontianus, Pomel, 1845. 

 bertrandi, Br., 1828. 

 biloba, Vanuxeni, 1842. 

 bohemicus, Sternb., 1825. 

 bollensis, Zilt, 1827. 

 brardii, Br., 1828. 



var., Br., 1828. 

 brianteus, Villa, 

 brongniartii, Harlan, 1832. 

 brongniartii, Mantell, 1833. 

 cauda-galH, Conrad, 1838. 

 circinatus, Br., 1828. 

 crenatus, Gutb., 1835. 

 crispiforniis, Br., 1823. 

 crispus, Gutb., 1835. 

 cylindricus, Sternb., 1825. 

 deniissus, Conrad, 183S. 

 dentatus, Br., 1828. 

 dentatus, Gutb., 1835. 

 dichotonius, Reich, in litt. 1838. 

 difformis, Br., 1823. 

 digitatus, Br., 1828. 

 discophorus, Br., 1823. 

 dufrenoyi, Poniel, 1845. 

 duplex, Hall, 1851. 



Delesserites bertrandi. 

 Cruziana bilobata. 

 Sargassites sternbergii. 

 Chondrites bollensis. 

 Caulerpites brardi. 

 Cupressites ullnianni. 

 Zoophycos villfE. 

 Arthrophycus alleghaniensis. 

 -i 



Taonurus cauda-galli. 

 Licrophycus circinatus. ? 

 Aphlebia crenatiis. 

 Sph^erococcites crispiformis. 

 Aphlebia crispa. 

 Halymenites cylindricus. 

 Phytopsis tubulosa. 

 Diplograptus pristiniforniis. 

 Rhacophyllum flabellatuni. 

 Haliserites reichii. 

 Gigartinites difformis. 

 Zonarites digitatus. 

 Tympanophora discophora. 

 > 



Cruziana duplex. ?. 



