4 ORDOVICIAN AND SILURIAN BELLEROPHONTACEA. 



from the Ludlow beds, and he recorded most of Sowerby's Ordovician and 

 Sikirian species from various localities. 



H. Hicks in 1873 ('Quart. Journ.Geol. Soc.,' vol. xxix, p. 50) briefly described 

 and figured two new species from the " Tremadoc " beds of the St. David's 

 district under the names BelleropJiou solvensis and B. ramseyensis. 



E.. Hicks in 1875 ('Quart. Journ. Geol. Soc.,' vol. xxxi, p. 318) described 

 and figured a new Arenig species from Wales under the name Bellerophon 

 Uanvirnensis. 



B. Etheridge in 1877 (' Proc. Roy. Phys. Soc, Edinburgh,' vol. iv, p. 175) 

 described a fossil from Drummuck, Girvan, as Bellerophon cf. suhdecussatus, 

 McCoy. 



In 1878 was published the ' Catalogue of the Cambrian and Silurian Fossils in 

 the Museum of Practical Geology, Jermyn Street,' and the following MS. names 

 were recorded (without descriptions) for various Ordovician and Silurian species : 



Bellerophon bilobatus, var. anceps 

 „ Grifthi, MS. 



Silurian. 



Bellerophon discus, Edgell, MS. "i 



„ , . . ,, falcatus, M.S. L,., 



,. T,^-, yOrdoviciau. •' ^'^ 



„ iingualis, Mb. „ ionicus. Salt., MS. 



,, semiriigostis,Salt.,M.S.j „ ventriculatus, Edgell, MS. ^ 



B. B. Newton in 1892 (' Geol. Mag.' [3], vol. ix, p. 339) described a Wenlock 

 species as Trematonotits hritannicus. 



F. B. G. Beed in 1901 ('Geol. Mag.' [4], vol. viii, p. 358) described and figured 

 the species to which Salter had applied the MS. name BelleropUon Buthveni. 



F. B. C. Beed in 1906 (' Geol. Mag.' [5], vol. iii, pp. 363—367) defined four 

 new species from the Bala beds of the Haverfordwest district under the names 

 Bellerophon (Siniiites) crypticus, Bellerophon? multirugatus, Belleroyhon {Bucani- 

 opsls) secundus, and Gonradella, sp. 



Group I. Integbidorsata. 

 * Genus SINUITES, Koken. 



Generic Gharacters. — Shell involute, composed of few whorls overlapping and 

 embracing; umbilicus closed or very small. Dorsum rounded or flattened, not 

 carinated. Aperture not abruptly expanded, with dorsal margin excavated by 

 more or less deep rounded or V-shaped sinus and lateral margins projecting 

 forwards as rounded or subangular lobes (" apertural lobes "). Interior of outer 

 whorl with one or more transverse thickenings of shell. 



The name Sinuites^ is here adopted in place of Uirich and Scofield's Broto- 

 warthia ^ because of its priority. The genotype is Bellerophon hilohatus, Sowerby, 

 sens. str. 



' Koken, ' Leitfossilien ' (Leipzig, 1896), p. 392. 

 = Ulricli and Scofield, op. cit, pp. 848, 867. 



