226 
AXTIARCHA. 
1888. Botliriolepis panderi, R. H. Traquair, Ann. Mag. Nat. Hist. [6] 
vol. ii. p. 495. 
Type. Imperfect head and trunk; School of Mines, St. Petersburg. 
A species scarcely smaller than the type, the head attaining a 
breadth of 0095, and much broader than long. Anterior median 
dorsal plate almost as broad as long, faintly keeled posteriorly. 
Ornamentation consisting of large stellate tubercles usually fused 
into vermiculating ridges. 
Form. Sf Loc. Devonian: River Ssjass, Govt, of St. Petersburg. 
P. 4490, 4490 a. Articular portion of large anterior ventro-lateral 
plate, and a similar smaller fossil. Purchased , 1884. 
P. 4492. Portion of dorso-lateral plate. Purchased , 1884. 
Bothriolepis major (Agassiz). 
[Plate YI. figs. 5-8.] 
1844. Glyptosteus reticulcjuslg, L. Agassiz, Poiss. Foss. vol. i. p. xxxiv 
(name only), in part. 
1844. Pterichthys major, L. Agassiz, Poiss. Foss. V. G. R. pp. 5, 19, 
133, pi. xxxi. figs. 1-3. 
1845. Botliriolepis ornatus , L. Agassiz (errore), ibid. pi. xxix. figs. 3-5. 
[Brit. Mus. No. 28873.] 
1845. Placotliorax paradoxus , L. Agassiz, ibid. p. 134, pi. xxx. a. 
figs. 20-23. [Portions of pectoral appendages; collection of James 
Powrie, Esq.] 
1860. Asterolepis major, E. vonEichwald, Letli. Rossica,vol. i. p. 1511. 
1880. Botliriolepis major, J. Lakusen, Verhandl. russ.-kais. mineral. 
Gesell. [2] vol. xv. p. 136. 
1888. Botliriolepis major , R. H. Traquair, Geol. Mag. [3] vol. v. p. 510, 
and Ann. Mag. Nat. Hist. [6] vol. ii. p. 501. 
1888. Botliriolepis giganteus , R. H. Traquair, Geol. Mag. [3] vol. v. 
p. 510, and Ann. Mag. Nat. Hist. [6] vol. ii. p. 504, pi. xviii.fig. 3. 
[Brit. Mus. No. 28873.] 
Type. Proximal plates of pectoral appendage ; Geological Society 
of London. 
An imperfectly known species, of moderate or large size. Tu¬ 
bercles upon dermal plates nearly always confluent, though often 
displaying indications of the original stellate bases. Proximal 
segment of pectoral appendage long and slender. 
The so-called Botliriolepis giganteus is now regarded by Traquair 
(in litt .) as the adult of this species. 
Form. Sf Loc. Upper Old Red Sandstone: Elgin. Devonian : 
N.W. Russia. 
f /? . S’ 
