PALEOZOIC. 



HYDKOZOA. 



CAMBRIAN AND SILUBIAN. 



OAMBBIAN. lOWEE SIL. 



TTPPEB SILUEIAK". 



SPECIES. 



Dioellograptus (continued), 



— Morrisii Soph 



DlCHOGBAPTID^. 



Dichograptus Salter, 1862 



— annulatus Itieh ;.... 



— fragilis HicTi 



— Logani Sail 



— multiplex Nieli 



— octobiuchiatus . . Sail 



— retlculatus Nick 



— • SedgwicJcii Salt 



— Sp. {small hranches) Salt. . 



DlOBANOaSAPTIDa;. 

 Dioranograptus... Sail, 1865. 



— Clingani Carr 



— formosus Soph.. 



■ — ■ Nicholsoni Soph.. 



— raraosus Sail . 



rectus Soph. 



Sail 



Caliogeaptid^. 

 Diotyograptus. . .Sail (Soph. 1875) 



Dietyonema ... Sail, 18^2 .,, 

 — cauceUatus Soph 



Honifrayi Soph.. 



lrreg:ularis Sail . 



— Sp. Sop.and Ijopit). 



Diotyonema Sall,i%Cj2 



Graptopora ...Sail, 18^2 



— radicans Soph 



— sociale Salt 



DiCHOGEAPTIDJS. 

 Didymograptus... M'Coy, 1851 ,. 

 Dichranograptus Sail, 1865 

 Cladograptus . , . Geinitz, 1842.. 

 Tetragrapt-us ... Salter, (part.) 



6 



^ H 



« 



KEFERENCES. 



Geol. Mag. vol. viii, p. 24, t. i, f. 2. Didym.flaccidm, Nich. 

 Geol. Mag. vol. iv, p. 1 10, t. 8, f . 1-3. Didymo. elegam, 

 CaiT. (part.), Geol. Mag. vol. v, p. 1 29, t. 5, f . 8. Dicellog. 

 Hopk. Geol. Mag. vol. viii, p. 24, 1. 1, f. 2. 



Ann. Mag. Nat. Hist. 4 ser. vol. iv, p. 233, 1. 11, f. 4, 5. 



Ann. Mag. Nat. Hist. 4 ser. vol. iv, p. 232, 1. 11, f. 1-3. 



Vide Loganogi-aptus, 



Q. J. Geol. Soc. vol. xxiv, p. 129, t. 6, f . 1-3. 



Oraptolithus, Geol. Surv. Canada, Grap. Quebec Group, p. 96, 

 t. 7, 8; ib. Nichol. Q. J. Geol. Soc. vol. xxiv, p. 129, t. 5, 

 f. I, 2. D. Sedgwichii, Salt. ib. vol. xix, p. 138. D. ara- 

 nea. Salt. ib. p. 137, f. 9. 



Q. J. Geol. Soc. vol. xxiv, p. 143, t. 5, f. 3, 5. 



Vide D. octobracbiatus. 



Q. J. Geol. Soc. vol. xix, p. 138, p. 137, f. 12. 



Geol. Mag. vol. \ 

 1. 16, f. 4. 



p. 132, t. 5, f . 6 ; ib. Hopk. vol. vii, p. 358, 



Geol. Mag. vol. vii, p. 356, 1. 16, f. 2. 



Geol. Mag. vol. vii, p. 357, 1. 16, f. 3. 



Biplograp. Grap. Quebec Group, p. 157. Orapto. Pal. New 

 York, vol. i, p. 260, t. 73, f. 3. Salter, Q. J. Geol. Soc. 

 vol. V, p. 16, 1. 1, f. 7. D. ramosus, Mem. Geol. Sui-v. vol. 

 iii. P- ,130j t. n A, f. :. Cladog. Geinitz. Dicranogitip. 

 Hall; Hopk. Geol. Mag. vol. vii, 1. 16, f. 4. 



Geol. Mag. vol. ix, p. 508, t. 12, f. 10. 



Vide Didymograptus. 



fide Hopkinson and Lapw. 1875. 



Hopk. and Lapw. Q. J. Geol. Sot-, vol. xxxi, p. 668, t. x6, 

 i. II. > 1- . 3 . 



Hopk. and Lapw. Q. J. Geol. Soc. vol. xxxi, p. 668, t. 36, 



Dictyonema, Gi-apto. Quebec Group, p. 136,- t. 20, f . i 2 • 

 lb. Hopk. and Lapw. Q. J. Geol. Soc. vol. xxxi, p. 668, 



t. 36, f. 12. ' 



Q. J. Geol. Soc. vol. xxxi, p. 669, t. 37, f. 4. 



Vide Callograptus. 



Siluria, 4 ed. p. 46, Eoss. 8, f. 3, Graptopora, Hall, Pal. 

 New York, vol. n, p. 1 74 ; Salter, Mem. Geol. Sui-v. vol. iii, 

 \ W\ & *• 'J^""' ^*'ly' Char. Foss. t. 3, f. 2 a-d; 

 lb. Expl sheets 167, &c. Geol. Surv. Irel. p. 28. (? Dictvo- 

 graptus.) ^ ■' 



