﻿352 CROSSOPTTIRYOm. 



Strepsodus striatulus, Traquair. 



1882. Strepsodus striatulus, R. H. Traquair, Geol. Mag 1 . [2] vol.ix. p. 544. 

 1890. Strepsodus striatulus, R. H. Traquair, Proc. Hoy. Soc. Edinb. 

 vol. xvii. p. 389. 



Type. Teeth ; collection of Dr. R. H. Traquair. 



Teeth not attaining so large a size as those of the typical species ; 

 never with a sharply-bent apex, and distinguished by the extreme 

 fineness of the inner striae, which are closely arranged. 



Form. 6f Loc. Middle Carboniferous Limestone (Edge-Coal Series) : 

 Borough Lee, near Edinburgh, and Abden, Fife. 



P. 4497. Two teeth. Presented by Dr. B. H. Traquair, 1884. 



Strepsodus sulcidens (Hancock & Atthey). 



1868. Rhizodus hibberti, Hancock & Atthey (errore), Ann. Mag. 



Nat. Hist. [4] vol. i. p. 346; also Nat. Hist. Trans. Northumb. and 



Durham, vol. iii. p. 81. 

 1870-71. Archichthys sulcidens, Hancock & Atthey, Ann, Mag. Nat. 



Hist. [4] vol. v. p. 268, and vol. vii. p. 79. 



1872. Archichthys sulcidens, Hancock & Atthey, Nat. Hist. Trans. 

 Northumb. & -Durham, vol. iv. pp. 201, 393. 



1873. Archichthys, T. P. Barkas, Coal-Meas. Pala3ont. p. 38, figs. 141, 

 142. 



1876. Archichthys sulcidens, W. J. Barkas, Monthly Rev. Dental Sur- 

 gery, vol. v. p. 7, figs, xci.-xciv. 



1890. Archichthys sulcidens, R, H. Traquair, Proc. Roy. Soc. Edinb. 

 vol. xvii. p. 389. 



Type. Mandibular ramus ; Newcastle-upon-Tyne Museum. 



The type species of " Archichthys" attaining a relatively large 

 size. Teeth robust, but elongated, somewhat laterally compressed, 

 with a straight apex : strise npon inner face very fine ; broad, faint, 

 vertically-elongated depressions extending upwards for a short space 

 above the basal furrows. 



Form. Sf Loc. Coal-Measures : Midlothian, Northumberland, and 

 Staffordshire. 



41116. Imperfect tooth ; Dalkeith, near Edinburgh. 



Purchased, 1868. 



45865 C. Tooth ; Low Main Seam, Newsham, near Newcastle-upon- 

 Tyne. Purchased, 1874. 



P. 723-4. Two teeth : Newsham. Egerton Coll. 



P. 3268. Tooth ; Newsham. EnnisHUen Coll. 



