650 DE. G. J. HINDE AND ME. HOWAED POX ON [Nov. 1895, 



Productus concentricus, Sarres. PL XXVIII. figs. 9, 9 a, & 9 6. 



1857. ' Inaugural Dissertation,' p. 21. 



1882. Kayser, Jahrb. d. konigl. Preuss. geol. Landesanst. f. 1881, p. 83, pi. iii. 

 figs. 3 & 4. 



The greater relative width of the shell and the well-marked sinus 

 induce me to refer the specimens to this species rather than to 

 P. plicatus. Possibly this is the Leptcena mesoloha (?), of Phillips 

 C Pal. Fossils, etc' 1841, p. 61, pi. xxv. fig. 102). The specimens, 

 in common with the others described, are only casts, and they are as 

 a rule very diminutive. Length 2*7 mm., breadth 4 mm. One 

 specimen is a specially wide form of the species ; its length is 4-5 

 mm., and breadth 11*5 mm. 



Not uncommon in Tower Hamlet Quarry and Hannaford Quarry, 

 near Barnstaple. Also at Aprath in the Lower Culm. 



Productus cf. P. Icevipunctatus, Sarres. PL XXVIII. figs. 11 & 11a. 



1857. Productus Icevipunctatus, Sarres, ' Inaug. Dissert.' p. 21. 



1882. , Kayser, Jahrb. d. konigl. Preuss. geol. Landesanst. f. 1881, p. 80, 



pi. iii. fig. 5. 



The specimen is an internal cast ; it has a sinus on the ventral 

 valve similar to that in the above species, but the shell is propor- 

 tionately somewhat wider than in the specimen figured by Kayser. 

 Length 3*25 mm., breadth 6 mm. 



Prom Hannaford Quarry, near Barnstaple. Also from the Lower 

 Culm at Aprath. 



Chonetes rectispina, von Koenen ? PL XXVIII. figs. 12, 1 2 a, & 

 12 b. 



1879. Neues Jahrb. fur Mineralogie, etc. p. 327, pi. vii. fig. 4. 

 1882. Kayser, Jahrb. d. konigl. Preuss. geol. Landesanst. f. 1881, p. 78, pi. iii. 

 figs. 13 & 14. 



It is difficult to distinguish the specimens from some varieties of 

 Ch. hardrensis, as understood by Davidson. Length 4*5 mm., 

 breadth 6 mm. 



Frequent in the soft yellowish shale at Overton Quarry and 

 Hannaford Quarry, near Barnstaple. Also in the Lower Culm of 

 Aprath and at Herborn. 



Chonetes Laguessiana, de Koninck. PL XXVIII. figs. 13 & 13 a. 



1843. ' Desoript. des Anim. foss. du Terrain Carbonif. Belgique,' p. 211, pi. xii. bis, 

 fig. 4 a, b. 



1857. Chonetes hardrensis, Davidson, ' Brit. Carbonif. Brachiop.' Pal. Soc. vol. ii. 

 pt. v. p. 186, pi. xlvii. figs. 12-16, 17, 18. 



1874-82. Laguessiana, ibid. vol. iv. p. 312, pi. xxxiv. fig. 18. 



1882. Kayser, Jahrb. d. konigl. Preuss. geol. Landesanst. f. 1881, p. 77, pi. iii. 

 figs. 17 & 18. 



This differs from the specimens referred to Ch. rectispina in its 

 greater relative breadth. Length 3 mm., breadth 5'2 mm. 



From Hannaford Quarry, near Barnstaple, and from "Westleigh 

 (Eev. "W. Downes). Also from the Lower Culm at Aprath (Kayser), 

 and from the Carboniferous Limestone of Yorkshire, Shropshire, 

 North of England, Scotland, Ireland, and Belgium. 



