FOSSIL SKETCHES, No. 1. 



CEPHALOPODA. 



1. OitTHorKRAR BFLLAIFM. Sowerby. Half-size, with transverse scrtion. 

 U])per Ludlow; near Fownhoiie. (Hereford Phil. Society.) 



Common in the Upper Liidlow and Do-miton Sandstone. 



2 Oin-nocERAS Ibex. Sowerby. (Cijcloc-ras. JlcCoy.) Natural size, 



witli transverse section. Upper Ludlow; near Fownhope. 



(Hereford Phil. Society.) 



E inging from the Caradoc beds to tlie tapper Ludlow. 



3. Op.rriocERA.s Ludexse. Sowerby. Half-size, witli transverse section. 

 Lower Ludlow; Leintwardine. (Hereford Phil. Society.) 



Cliaracteristic of the Lower Ludlow beds. 



4. PHr.AGMocEEAS PYRiFORME. Sowcrby. ( Gomjthoccras. Sil. Syst.) 

 Two-thirds size. Lower Ludlow ; Moclvtree. (Kev. E. Dixon.) 



....(a) LTjjper chamber of ditto, with the curious contracted month. 



(Dr. Griudrod.) 

 (b) Sij)luincle of ditto, from Slurchison. 



This whole genus is very characteristic of the Lower Ludlow beds. 



5. Orthocekas annulatijm. Sowerby. ( Cijcloceras. McCoy.) Natural 



size, with ti-ansverse section. Woolhope limestone ; Scutterdine, 



near Hereford. (Eev. E. Di.xon.) 



Eansiug from the Caradoc to the Wenlock series. 



