352 
CKOSSOPTEUYOTT. 
Strepsodus striatulus 5 Traquair. 
1882. Strepsoclus striatulus, E. H. Traquair, Geol. Mag [2] vol.ix. p. 544. 
1890. Strepsodus striatulus, It. H. Traquair, Proc. Eoy. Soc. Edinb. 
vol. xvii. p. 389. 
Type. Teeth; collection of Dr. E. 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. <$f Log. Middle Carboniferous Limestone (Edge-Coal Series) : 
Borough Lee, near Edinburgh, and Abden, Eife. 
P. 4497. Two teeth. Presented by Dr. R. 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. Palfeont. p. 38, figs. 141, 
142. 
1876. Archichthys sulcidens , W. J. Barkas, Monthly Eev. Dental Sur¬ 
gery, vol. y. p. 7, figs, xci.-xciv. 
1890. Archichthys sulcidens, E. H. Traquair, Proc. Eoy. Soc. Edinb. 
vol. xvii. p. 389. 
Type. Mandibular ramus ; Newcastle-upon-Tyne Museum. 
The type species of u Archichthys” attaining a relatively large 
size. Teeth robust, but elongated, somewhat laterally compressed, 
with a straight apex; striae upon inner face very fine ; broad, faint, 
vertically-elongated depressions extending upwards for a short space 
above the basal furrows. 
Form, Log. Coal-Measures : Midlothian, Northumberland, and 
Staffordshire. j? . 
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. Enniskillen Coll. 
