318 Prof. T. R. Jones on the 



" Petherwin " is mentioned, at p. 27, among several localities 

 for Cypridina {Entomis) serratostriata, Sandb.* 



In the Quart. Journ. Geol. Soc. vol. xxiii. (18G7) pp. CIS 

 and C70, Mr. Etheridge refers '■'■Cypridina serratostriata " to 

 the English Upper-Devonian (Petherwin) , probably on MM. 

 Sandberger's authority. 



The occasion and circumstances of the first discovery of 

 ^^C. striatostriata'''' in Soutli Devonshire are given in detail 

 by Fr. Adolph lloemer in the report of a geological excursion 

 which lie had made with Mr. R. A. C. Godwin-Austen, from 

 Newton-Bushel to West Ogwell, Cliudleigh, and other 

 localities (see the ' Neues Jalirbuch f. Min. &c.,' Jahrg. 

 1853, pp. 810-818). At page 812 this little fossil (now 

 known as Entomis ser7-atostriata) is mentioned as occurring 

 in a series of red schists near Bickington, at tlie south-eastern 

 foot of the Rarashorn Down — a locality quite distinct from 

 those mentioned by Dr. E. Kayser t as yielding the same 

 fossils J, during a tour in Devon after the Meeting of the 

 Geological Congress in London in 1887. 



Pursuing his researches in South Devon, ^Mr. U.>slicr, 

 making the Official Geological Survey of the district, found 

 that the Entoniis-sl^tes (equivalent to the mis-named " Cypri- 

 dinen-Schiefcr ")" occur in the area between Kingsteignton 

 and Bishopsteignton, on each bank of the Teign, where the 

 characteristic Posidonomya and Entomis, with an occasional 

 imperfect Trilobite (perhaps Fliacops), have been found in 

 them. On the other side of the Teign alluvium from Knowles 

 Hill, Newton-Abbot .... to Ilighweek and Houghton, 

 their occurrence is similarly proved by fossil evidence. They 

 are recognizable by similar characteristics near Ilsham and 

 Anstey's Small Cove. 



" In Whiteway Farmyard greenish-grey clay-slates were 

 identified as ' Cypridinen-Schicfer ' by Kayser, who mentions 

 the occurrence of numerous examples of Posidonomya venusta 

 as well as Trimerocephalus (cf. cryptophthahnus) in them. At 



• I\Iy friond Mr. W. A. E. Usshor tells me that he sees no reason why 

 Eiatoniidi's should not occur at 8(.>uth Petherwin ; for the Pethorwiu beds 

 are l^pper Devonian and souiewhat similar in places to the Livaton beda 

 (between Bickin^'ton and Bovey), and they are correlated with the 

 rilton bods; he also regards them as being correlative with the zone of 

 Ithywlumtlla htiinsis in the Ardt nnes. 



t " Ueber das Devon in Devonshire und im Boulonuais," Neues Jahrb. 

 f. Min. &c., lf>89, vol. i. part 2, p. IS.J. 



\ On the road from Ugbrookc Park to Lowell (near Chudloigh\ar.d at 

 Whiteway Farm, about 3 niiloa soutli-east of Chndlei^h. These places 

 are uorth-ea^t of the Dovoy valley: Hickinjrton is south of that valloy. 



