EURi'PTERlDA. 07 



Pterygotus Banksii, Salter, 1856. Passage Beds, Ludlow ; U. Ludlow 



Hock, Whitcliffe &c. ; Downton Sandstone, Kington, Herefordshire. 



Himantopterm Banksii, Salter, 185G, Quart. Journ. Geol. Soc. vol. xii. pp. 32 



& 90, pi. ii. lio-. 5 ; id. Siluria, 3rd edit. p. 266, foss. 66. tig. 1. 

 Pterygotus Banksii, Salter, Mem. Geol. Surv. mon. i. 1859, p. 51, pi. xii. figs. 

 22-46 ; H. Woodw. 1872, Mon. Pal. Soc. Merostomata, pt. 3, p. 72, pi. xvi. 

 figs. 2-6; Salter, 1873, Cat. C^amb. & Sil. Foss. p. 189. 



Pterygotus bilobus, Salter, 1856. U. Ludlow Hock, Lesmahagow, 



Lanarkshire. 

 Himantoptenis btlubus, Salter, 1856, Quart. Journ. Geol. Soc. vol. xii. p. 29, 



fig. 1 ; id. 1859, Siluria, 3rd edit. p. 178, foss. 25. figs. 1-4. 

 Pteri/fiotui bilobus, Salter, 1859, Mem. Geol. Surv. mon. i. p. 39, pi. i. figs. 1-12 ; 

 Salter, 1873, Cat. Camb. & Sil. Foss. p. 179. 



Pterygotus bilobus, var. a. inornatus, Woodw. 1869. U. Ludlow 



Rock, Lesmahagow, Lanarkshire. 

 Himantopterus bi/obu.^, Salter, 1856, Quart. Journ. Geol. Soc. vol. xii. p. 29, 

 fig. 1 ; id. Page's Advanced Textbook, 1856, p. 135, fig. 1 ; id. 1859, Siluria, 

 3rd edit. p. 178, foss. 25. figs. 1-4. 

 Pterygotus bilobus, Salter, 1859, Mem. Geol. Surv. mon. i. p. 39, pi. i. figs. 1-12. 

 Pterygotus bilobus, var. inornatus, II. Woodw. 1869, Mon. Pal. Soc. Mero- 

 stomata, pt. 2, p. 55, pi. X. figs. 1-3. 



Pterygotus bilobus, var. /3. crassus, H. Woodw. 1869. U. Ludlow 



Hock, Lesmahagow, Lanarkshire. 

 Pterygotus bilobus, var. /3. crassus, II. Woodw. 18C9, Mon. Pal. Soc. Mero- 

 stomata, pt. 2, p. 62, pi. xi. fig. 1. 



Pterygotus bilobus, var. y. perornatus, Salter, 1856. U. Ludlow 



Rock, Lesmahagow, Lanarkshire. 



Himantopterus perornatus, Salter, 1856, Quart. Joui'n. Geol. Soc. vol. xii. 

 pp. 31 k 28, fig. 6. 



Pterygotus perornatus, Salter, Mem. Geol. Surv. mon. i._l859, p. 45, pi. i. figs. 

 13-16, pi. XV. fig. 2. 



Pterygotus bilobus, var. y. perornatus, II. W^oodw. 1869, Mon. Pal. Soc. Mero- 

 stomata, pt. 2, p. 63, pi. xi. fig. 2 ; Salter, 1873, Cat. Camb. & Sil. Foss. 

 p. 179. 



Pterygotus bilobus, var. ^. acidens, H. Woodw. 1869. U. Ludlow 



Hock, Lesmahagow, Lanarkshire. 



Pterygotus bilobus, var. S. acidens, II. Woodw. 1869, Mon. I'al. Soc. Mero- 

 stomata, pt. 2, p. 68, pi. xii. 



Pterygotus gigas, Salter, 1859. U. Ludlow Rock, Kington, Hereford. 



Pterygotus prohkmaticus. Banks, 1856, Quart. Journ. Geol. Soc. vol. xii. p. 93, &c. 

 Pterygotus gigas, Salter, 1859, Mem. Geol. Surv. mon. i. p. 83, pis. viii. & ix. ; 



II. Woodw. 1872, Mon. Pal. Soc. Merostomata, pt. 3, p. 79, woodcut fig. 17 : 



Salter, 1873, Cat. Camb. & Sil. Foss. p. 189. 



Pterygotus ludensis, Salter, 1859. Old Red Sandstone. Ludlow. 



Pterygotus ludensis, Salter, 1859, Mem. Geol. Surv. mon. i. p. 79, pis. ix., 

 xii., & xiv. : II. Woodw. 1872, Mon. I'al. Soc. Merostomata, pt. 3, p. 76. 

 pi. xvi. figs. 7 9 ; Salter, 1873, Cat. Camb. & Sil. Foss. p. 19.!. 



