TRANSACTIONS OF THE SECTIONS. 



57 



On the Loiuer Lias, and traces of an ancient BJicetic Shore in Lincolnshire. 



By F. M. BuKTON. 



Enumeration of British Graptolites. By William Caeeuthees, F.L.S. 



The genus was established hy Linureus, in the first edition of his ' Systenia 

 Natiirse/ for a series of natiu-al productions which had previously been considered 

 to be true fossils. In the genus, as it appeared in the early editions, not a single 

 species of the fossils to which the name is now confined was included. No alte- 

 ration was introduced into the genus until the twelfth edition, when G. scalaris 

 appears, which had already been figured by Liiuiaeus in his Scanian travels. This 

 is the true t^'pe of the family, and the only species with which Linnseus was 

 acquainted. The single-celled graptolite, which has by every one been referred to 

 Linnreus's G. Sagittarius, has nothing whatever to do with the organism to which 

 he gave this name. His species is founded on a fragment of Lepidoclendron figiu-ed 

 by \^olkmanu. To coiTect this error, and to make the extent of the acquaintance 

 which Linufeus had with these fossils more obvious, it was proposed to substitute 

 the name G. Ilisiiu/cri for the species, after the distinguished palaeontologist who 

 first described the species, but eri'oueously gave it the Linnean name. The whole 

 of the species were included by Murchison, Portlock, and others in the original 

 Linnean genus. New genera were introduced by Barrande, M'Co}-, Hall, Salter, 

 and the author. The various genera were then described, their different charac- 

 teristics noticed, and the number of species given. A new genus, Ci/rtoffra2}siis, 

 was proposed for a singular form from the Wenlock of England, of which a single 

 species only has been observed occiu-ring both in England and Bohemia, and 

 which the author dedicated to the distinguished author of 'Siluria.' The netted 

 forms which had been refeii'ed to this family had been carefully examined by the 

 author, but he could not satisfy himself as to their affinities, and for the present 

 must exclude them. 



The author enumerated the following fifty-two species, excluding synonyms : — 



Eastrites peregrinus, Barr., Llandeilo. 



R. Linnwi, Barr., Llandeilo. 



E. maximus, «p. luiv., Llandeilo. 



E. capillaris, fp. nov., Llandeilo. 



Graptolitbus Becki, Barr.. Llandeilo. 



G. convolutus, His., Llandeilo. 



G. Halli, Barr., LlandeUo. 



G. Hisingeri, Car., Llandeilo. 



G. Nilssoni, Burr., Llandeilo. 



G. tenuis, Portl., Llandeilo. 



G. intermedium, sp. nov., Llandeilo. 



G. Clingani, sp). nov., Llandeilo. 



G. Griestonensis, IXic, Caradoc. 



G. Salteri, Gein., Caradoc. 



G. Sedgwickii, Portl., Llandeilo and Ca- 

 i-adoc. 



G. priodon, Bronn, Llandeilo to Ludlow. 



G. Flemingii, Salt., Wenlock.? 



Cyrtograpsus Murchisonii, sp. nov., Wen- 

 lock. 



C. ? bamatus {Bail.), Caradoc. 

 Didymograpsus bryonoides, Hall, Llan- 

 deilo, 



D. Forchhammeri, Gein., Llandeilo. 

 D. elegans, sp. 7iov., Llandeilo. 



D. geniinus, His., Llandeilo. 

 D. liii'undo, Salt., Llandeilo. 

 D. Moffatensis, Car., Llandeilo. 

 D. Miu-chisonii, BecX; Llandeilo. 



D. septans, Hall, Llandeilo. 

 D. caduceus, Salt., Caradoc. 

 Dichograpsus aranea, Salt., Llandeilo. 

 D. Sedgwickii, Salt., Llandeilo. 

 T>. crucialis. Salt., Llandeilo. 

 Cladograpsus linearis, Car., Llandeilo. 



C. gracilis (Hall), Llandeilo. 

 Dendrograptus fiu-catula, Salt., Llandeilo. 



D. lentus, «p. woy., Caradoc. 

 Diplograpsus acuminatus, Kick, Llan- 

 deilo. 



D. barbatulus. Salt., Llandeilo. 

 T>. cometa, Gein., Llandeilo. 

 D. folium. Hi.'?., Llandeilo. 

 D. mucronatus, Hall, Llandeilo. 

 D. pennatus, HarJcn., Llandeilo. 

 D. pristis. His., Llandeilo. 

 D. tricornis, Car., Llandeilo. 



D. Whitfieldi, Hall, Llandeilo. 

 CUmacograptus bicornis. Hall, Llandeilo. 

 C. bullatus, {Salt.), Caradoc. 



C. scalaris {Linn.), Hall, Llandeilo and 

 Caradoc. 



Eetiohtes Geinitzianus, Barr., Wenlock. 



E. venosus, Hall, Wenlock. 

 Dicranograptus ramosus, Hall, Llandeilo. 



D. Clingani, sj). nov., Llandeilo. 

 Pbyllograptus angustifolius, Hall, Llan- 

 deilo. 



