74 W. Baldmn — Fossil Mt/riopods from the Coal-measures. 



specimens collected by himself which have been used to confirm my 

 observations. 



Literature referred to in the text. 



1829. Stokes. Extracts of a letter explanatory of three drawings of Echini : 

 Trans. Geol. Soc, ser. n, vol. ii, p. 406. 



1835. Des Moullns. "Etudes sur les Echinides. I. Etudes generates " : 



Actes Soc. Linn. Bordeaux, tome vii, livr. iv. 



1836. Grateloup. " Memoire . . . sur les Oursins f ossiles . . . des environs 



de Dax " : Actes Soc. Linn. Bordeaux, tome viii, livr. iii. 

 1842. Desor. Monographies des Echinodermes — Des Galerites. 

 1850. Forbes. Mem. Geol. Surv., dec. iii, pi. viii. 

 1857. Desor. Synopsis des Echinides f ossiles. 

 1859. d'Orbigny (posthumous). Paleont. franc., Terr, eret., tome vi, 



Echinodermes. , 



1874. Loven. "Etudes sur les Echinoidees " : K. Svensk. Vet.-Akad. Handl., 



Band xi, No. 7. 

 1874. Wright. Mon. Brit. Foss. Echinodermata from the Cretaceous 



Formations, vol. i, pt. vi : Palssont. Soc. 

 1884. Duncan. "On Galerites albogalerus, Lamarck, syn. Echinoconus 



conimis, Breynius " : Geol. Mag., N.S., Dec. Ill, Vol. I, pp. 10-18. 

 1892. Loven. " Echinologica " : K. Svensk. Vet.-Akad. Handl., Band xviii, 



No. 1. 

 1900. Gregory in Lankester's Treatise of Zoology, vol. iii, Echinoderma 



[Echinoidea] . 

 1900. Sladen in Zittel - Eastman, Text Book of Paleontology, vol. i 



[Echinoidea] . 

 1909. Agassiz. " On the existence of Teeth and of a Lantern in the genus 



Echinoneils, Van Phels " : Amer. Journ. Sci., ser. rv. 

 1909. Hawkins. " On the Jaw Apparatus of Discoidea cylindrica, Lamarck" : 



Geol. Mag., n.s., Dec. V, Vol. VI, No. 4, pp. 148-52, PI. VI. 



EXPLANATION OF PLATE. 



Fig. 1. Sketch of the specimen of Conulus subrotundus (in British Museum), 

 showing the teeth in situ, x 1J. 



,, 2. Side view of tooth of same. x 6. 



,, 3. Inner (concave) view of tooth, x 6. 



,, 4. Outer (convex) view of tooth, x 6. 



,, 5. Section of tooth, x 6. 



,, 6. Side view of tooth of Discoidea cylindrica, for comparison with Fig. 2. 

 x 6. 



,, 7. Inner view of perignathic girdle and buccal plates of Conulus albo- 

 galerus. x 2. 



,, 8. Diagrammatic sketch of the suggested method of movement of the 

 buccal plates. The dark lines represent the positions of the 

 retractor muscles. 



VI. — Fossil Myriopods from the Middle Coal-measures of Sparth 

 Bottoms, Hochdale, Lancashire. 



By Walter Baldwin, F.G.S., M.Inst.M.E., Government Geologist, 

 Gold Coast, West Africa. 



(PLATES IV AND V.) 



IN the Geological Magazine for December, 1907, a brief account 

 was given by Dr. Henry "Woodward, F.R.S., of the work of 

 a small committee of Littleborough and Rochdale geologists, who have 

 for several years been engaged in an examination of the Arthropod 

 Beds at Sparth Bottoms, Rochdale. At Sparth Bottoms several beds 



