526 -MR. A. n. FOOKD ON SOME 



APPENDIX II. — On some CErnALOPODA from the Cross Fell Inliek. 

 By A. H. EooKD, Esq., E.G.S. 



1. Oethoceras, cf. elongatocinctum, Portlock. 



Portlock, 'Geology of Londonderry,' (1843) p. 372, pi. xxvii. 

 figs. 2a, 2?;. Blake, 'British Fossil Cephalopoda,' pt. i. (1882) 

 p. 119, pi. xiii. figs. 7, 8,8«. 



Description. An elongated, cylindrical species with a very slow 

 rate of increase ; the septa, as seen in fragments, distant from each 

 other rather less than one-third the diameter of the shell. Tlio 

 siphuncle nearly central. The test ornamented with regular, 

 transverse, thread-like striae, which do not appear to undulate? ; 

 about nine of them occupy the space of a line. Abundant in the 

 limestone of Keisley, near Dufton. 



Bemarlcs. This is probably the species referred to by Profs. 

 Harkness and Nicholson * under the name of Orthoceras vagans, 

 Salter. The present species differs, however, from the latter (as 

 interpreted by Prof. Blake) in its more approximate septa, and in 

 the well-defined character of the ornaments of the test, whereas 

 Salter's species is described as smooth (Salter t) or showing only 

 lines of growth (Blake ±). All the specimens are more or less 

 covered by the matrix, but the ornaments of the test are shown on 

 several of them. 



The present species differs from Portlock's in respect of the septa, 

 which are wider apart than they are stated to be in his species. 

 Orthoceras sodale, Barrande §, presents some resemblance to the 

 present form in its slow rate of increase, the position of the 

 siphuncle, and the surface-ornaments ; but the septa are more 

 remote in 0. sodale, which is also a larger and more robust shell 

 than the one here described. 



There appears to be another species associated with this one in 

 the same matrix, but it is too fragmentary for description. 



2. Orthoceras, sp. 



Description. An eroded fragment of a large Orthoceras from the 

 Staurocephalus zone of Swindale is too imperfect for specific identi- 

 fication. The four chambers preceding the body-chamber are alone 

 preserved. The shell may have been cylindrical or possibly elliptical 

 in section : but the weathering it has been subjected to has de- 

 stroyed its original form, causing one side to be flat while the other 

 remains rounded. The septa are deeply concave ; rather distant 

 from each other, i. e. about seven lines apart where the diameter of 

 the cast is about 1 inch 10 lines. The last two septa are, however, 



* Quart. Journ. Geol. Soc. vol. xxxiii. (1877) p. 461, 'On the Strata and tLeir 

 Fossil Contents between the Borrowdale Series of the North of England and 

 the Coniston Flags.' 



t In Sbarpe, ' On the Geology of Oporto,' Quart. Journ. Geol. Soc. vol. v. 

 (1849) p. 153. 



+ ' British Fossil Cephalopoda,' pt. i. (1882) p. 141. 



§ ' Syst. Sil. de la Bolieme,' vol. ii. pt. iii, (1874) p. 453, pi. ccccxvii. (exi-1. 

 ilgs. 12, 13). 



