406 MR. G. C. CRICK OX CARBONIFEROUS CEPHALOPODA [Aug. I9II, 



Gltphwceras sph^ricum (Martin). 



1809. ConcJiyliolithus Nautilites splice ricus W. Martin, ' Petrifacta Derbiensia ' 



p. 15 & pi. vii, figs. 3-5. 

 1814. Ammonites spheericus J. Sowerby, ' Min. Conch.' vol. i, p. 116 & pi. liii, 



fig. 2 [B.M. No. 43871 j. 1 



A fairly well-preserved pyritized specimen in the British Museum, 

 obtained with the Vicary Bequest and labelled ' Bonhay Road, 

 Exeter,' is referred to this species. Its measurements are : — 

 diameter, 18-4 mm. ; greatest thickness, 15 mm. ; height of outer 

 whorl, 7 mm. ; ditto above preceding whorl, 4 mm. ; width of 

 umbilicus, 4 mm. The suture-line is well shown, and agrees with 

 that of the specimen figured by Sowerb} r , which may also have been 

 Martin's type. This is probably one of the specimens mentioned 

 by Mr. Ussher as being in the Vicary collection. 2 



In a ' decomposed blackish ferruginous rock ' exposed in the 

 valley between Five -Mile Hill Cross and Ball Oaks, between 

 Tedborn St. Mary, Whitestone, and Holcombe Burnell, Mr. Ussher 

 records the occurrence of badly-preserved goniatites, ' suggesting 

 the presence of GU/phioceras s_phcericum.' 3 Dr. Hind records the 

 species from the ' black shales and limestones ' at Venn, in North 

 Devon ; and notes 4 its presence in South Devon in the cherty 

 representatives of the Codden-Hill or Prolecanites-compressus Beds. 

 It has also been recorded in a pyritized condition from Fremington 

 (North Devon). 5 



In the Midlands, Dr. Hiud & Mr. Howe have identified the 

 species from the Carboniferous Limestone of Castleton (Derby- 

 shire), Park Hill, Cracoe, and Thorpe (Yorkshire), and Clitheroe 

 (Lancashire) 6 ; while the same authors and Mr. G. W. Lamplugh T 

 have recorded the species from the Poolvash Limestone (Isle of 

 Man). 



Locality. — Bonhay Eoad, Exeter [Brit. Mus. C 9111]. 



Gltphioceras crenistria (J. Phillips). 



1836. Goniatites crenistria J. Phillips, ' Geol. Yorks.' pt. 2, p. 234 & pi. xix 



figs. 7-9.8 



From Popehouse Close, Christovv, there is anuncrushed specimen, 

 consisting of about half a shell, 22 mm. in diameter, 14 mm. thick, 

 with an umbilicus some 4 mm. wide at its margin; it is orna- 

 mented with fine crenulated strise, which are direct on the lateral 

 area and form only an exceedingly shallow orad-concave curve on 



1 For references and synonymy, see A. H. Foord & G. C. Crick, Catal. Foss. 

 Ceph. Brit. Mus. pt. 3 (1897) p. 157 ; also A. H. Foord, 'Monogr. Carb. Cephal. 

 Ireland ' (Pal. Soc.) pt. 5 (1903) p. 154. 



2 'Geology of the Country around Exeter-' Mem. Geol. Surv. 1902, p. 16. 



3 Ibid. p. 9. 



4 ' The Naturalist ' 1909, pp. 169, 170. 



5 Catal. Foss. Ceph. Brit. Mus. pt. 3 (1897) p. 160. 



G Q. J. G. S. vol. lvii (1901) App. A, table lacing p. 402. 



7 ' Geology of the Isle of Man ' Mem. Geol. Surv. 1903, p. 262. 



8 For references and synonymy, see A. H. Foord & G. C. Crick, Catal. Foss. 

 Ceph. Brit, Mus. pt. 3 (1897) p. 160 ; and A. H. Foord, « Monogr. Carb. Cephal. 

 Ireland' (Pal. Soc.) pt. 5 (1903) p. 157. 



