402 



ME. G. C. CEICK ON CAEBONIFEKOTTS CEPHALOPODA [Aug. 19!!, 



diadema, 1 but Prof. Hang considers these species distinct, and for 

 the latter adopts L. G. de Koninck's name beyrichianum. 2. 



The localities given by Phillips 3 for this species are : — ' In shale, 

 Kulkeagh ; near Enniskillen ; in shale, High-Green Wood, near 

 Todniorden.' 



Localities. — Pinhoe brickfield, near Exeter [F. G. C. & Brit. 

 Mus.] ; near Barley ; Exeter [Exeter Mus.] ; Dunsford Road, above 

 Pocombe Bridge [Exeter Mus.] ; probably from the c bottom of 

 Ashlake Road,' Mincing Lake, and Perridge Tunnel ; possibly also 

 from the ' bottom of Idestone Hill ' ; and Bonhay Road. 



Gltphioceras reticulatum (J. Phillips). 



1836. Goniatites reticulatus J. Phillips, ' Geol. Yorks.' pt. 2, p. 235 & pi. xix, 

 figs. 26-32 ; G. gibsoni J. Phillips, ibid. p. 236 & pi. xx, figs. 13-18. 



1897. Glyphioceras reticulatum A. H. Foord & G. C. Crick, Catal. Foss. Ceph. 



Brit. Mus. pt. 3, p. 193 (with references & synonyms). 4 



1898. Glyphioceras reticulatum E. Haug, ' Etudes sur les Goniatites' Mem. 



Soc. Geol. France, Paleont. vol. vii, no. 18, p. 87 & pi. i, figs. 32-39, 

 41, 42. 



The specimens from Pinhoe here referred to this species are 

 relatively thicker than the Yorkshire forms. A well-preserved and 

 apparently uncrushed example, 31 mm. in diameter, is 17 mm. 

 thick, and has an umbilicus about 8*3 mm. wide at its margin, 

 while the heigbt of the outer whorl is about 14 mm. Portions of 

 the test are beautifully preserved, and show both the prominent 

 transverse and some very faint longitudinal striae. The jugosum- 

 stage of the species is also represented. The British Museum col- 

 lection contains several fairly well-preserved examples from the 

 Yicary collection, labelled ' Pinhoe.' 5 



The best-preserved of these [C 9118] is elliptical, its diameters 

 being 35 and 24 mm. respectively. Its constrictions are less curved 

 than is usual in Gl. reticulatum, and in this respect the fossil 

 approximates to Gl. excavatum G ; but the type-specimen of that 

 species — a specimen with the whole of the outer whorl non-septate 

 and apparently belonging to the body-chamber — is a more com- 

 pressed shell than ordinary examples of Gl. reticulatum. Moreover, 

 if one of the specimens, a completely septate example 20 mm. in 

 diameter in the Gilbertson Collection, is correctly identified as 

 Gl. excavatum, the lateral lobe of the suture-line of that species 

 is, as described by Phillips, more acute than in Gl. reticulatum ; 



1 A. H. Foord & G. C. Crick, op. cit. p. 202. 



2 E. Haug, op. cit. pp. 92 & 95. See also ante, p. 400. 



3 ' Geol. Yorks.' pt. 2 (1836) p. 234. 



4 See also A. H. Foord, ' Monograph of the Carboniferous Cephalopoda of 

 Ireland' (Pal. Soc.) pt. 5 (1903) p. 182. 



5 Nos. C 9115-18, C 12662 (young), & C 12800. Probably these are the 

 fossils mentioned by Mr. W. A. E. Ussher, 'Geology of the Country around 

 Exeter' Mem. Geol. Surv. 1902, p. 16. 



6 Goniatites excavatus J. Phillips, ' Geol. Yorks.' pt. 2 (1836) p. 235 & pi. xix, 

 figs. 33-35. Not Goniatites excavatus J. Phillips, 'Palaeoz. Foss. Cornwall, 

 Devon, & W. Somerset' 1841, p. 121 & pi. 1, fig. 232 = Mceneceras molarium 

 (G. F. Whidborne). 



