318 Prof. T. E. 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. (1867) pp. 618 

 and 670, Mr. Etheridge refers "Ci/pridtna 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 South Devonshire are given in detail 

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

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

 Newton-Bushel to West Ogwell, Chudleigh, and other 

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

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

 known as Entomis serratostriata) is mentioned as occurring 

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

 foot of the Kamshorn Down — a locality quite distinct from 

 those mentioned by Dr. E. Kayser f 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. Ussher, 

 making the Official Geological Survey of the district, found 

 that the Eyitomis-^X&XQB (equivalent to the mis-named " Cypri- 

 dinen-Schiefer ") " 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 Phacops), have been found in 

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

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

 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-Schiefer ' by Kayser, who mentions 

 the occurrence of numerous examples of Posidonomya venusta 

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



* My friend Mr, W. A. E. Usslier tells me that he sees no reason why 

 Entomides should not occur at South Petherwin ; for the Petherwin beds 

 are Upper Devonian and somewhat similar in places to the Livatou beds 

 (between Bickington and Bovey), and they are correlated with the 

 Pilton beds ; he also regards them as being correlative with the zone of 

 Rhynchonella letiensis in the Ardennes. 



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

 f. Min. &c., 1889, vol. i. part 2, p. 185. 



X On the road from Ugbrooke Park to Lewell (near Chudleigh), and at 

 Whiteway Farm, about 3 miles south-east of Chudleigh. These places 

 are north-east of the Bovey valley ; Bickington is south of that valley. 



