492 Dr. E. H. Traquair on 



Rhadimchthys elegantulus, Traq. 



Rhadinichthys Geikiei, Traq. Trans. Roy. Soc. Edinb. xxx. 1881, p. 25, 



non Proc. Roy. Soc. Edinb. ix. 1877, p. 438. 

 Rhadinichthys Geikiei, var. ehgantuhis, Traq. Trans. Roy. Soc. Edinb. 



xxx. 1881, p. 27. 

 Rhadinichthys delicatuhis, Traq. ibid. p. 29. 



In the Proc. Roy. Soc. Edinb. 1889-90, pp. 397, 398, I 

 have given my reasons for referring the original Rhndinichthys 

 GeAMei to Bh. carinatus, Ag., and also for believing that the 

 Eskdale fish is a distinct species, for which the term elegan- 

 tulus, which I had used to designate a variety, must now 

 be adopted. From this species I can no longer separate lih. 

 delicatulus. 



Acroleins ortholejns, Traq. 



Elonichthys ortholejns, Traq. Geol. Mag. (3) vol. i. 1884, p. 7. 

 Acrolepis ortholepis, Traq. Proc. Roy. Soc. Edinb. 1889-90, p. 398. 



The Edinburgh Museum possesses a splendid specimen of 

 a large Palgeoniscid, 25^ inches in length, which, from the 

 scale-ornament, I must refer to the same species as the fish in 

 the British Museum to which six years ago I gave the name 

 of Elonichthys ortholepis. In the present specimen, however, 

 the great thickness of the scales, along with their shape, 

 indicate that its position is in Acrolepis, a position corrobo- 

 rated by the absence of serrations along the posterior margins 

 of the scales. The original ^^Elonichthys " ortholepis is, it 

 may be added, an immature example 12 inches in length. 



Styracopterus fulcratus, Traq. 

 Holurus fulcratus, Traq. Trans. Roy. Soc. Edinb. xxx. p. 40. 



The original specimen of Holurus fulcratus, Traq., in the 

 collection of the Geological Survey of Scotland is a mere 

 frag-ment. By a mistake its locality was given as Glen- 

 cartholm, whereas it was in reality found at Tarras Foot. 



TheGeological Survey officers have since acquired a number 

 of additional specimens from the same locality wliich show 

 that the species does not belong to Holurus, but to a new 

 genus closely allied to Benedenichthys *, Traq., from the 

 Carboniferous Limestone of Belgium. As these specimens 

 belong to the Survey, I must defer their description to the 

 forthcoming second part of the " Report." 



* Benedeniits, Traq., in de Koninck's 'Faune du Calcaire carbonifere de 

 la Belgique,' pt. i. 1878, p. 15. A critic in the Ann. & Mag. Nat. Hist. 

 (5) vol. vi. 1880, p. 97, having pointed out that the name '' Be7iedenius " is 

 preoccupied, I propose to alter it to Benedenichthys, and at the same time 

 to state that I have become convinced that, though it presents many re- 

 eemblances to the Platysomidae, it is after all more Palseoniscid, and should 

 be restored to the family Palpeoniscidoe. 



