ADDENDA ET CORRIGENDA. 
551 
fakt. pt. v. (1842), p. 35, pi. xiv. fig. 4; Hancock & Howse, Quart. 
Journ. Geol. Soc. vol. xxvi. (1870), p. 623, pis. xlii., xliii., and Nat. 
Hist. Trans. Nor thumb. & Durham, vol. iv. (1872), p. 243, pis. ix., x.; 
K. A. von Zittel, Handb. Paheont. vol. iii. (1887), p. 252, woodc. 
fig. 265 : (?) Platysomus althausii , G. von Hiinster, Beitr. Petre- 
fakt. pt. v. (1842), p. 44, pi. v. fig. 2 : (?) Dorypterus alihcmsi, K. A. 
von Zittel, tom. cit. p. 251, woodc. fig. 264. [Palaeontological 
Museum, Munich.]—Upper Permian (Kupferschiefer); Province of 
Saxony and Hesse. Upper Permian (Marl Slate) ; Durham. [Type 
specimen in University Museum, Halle; English specimens in 
Museum of Newcastle-upon-Tyne.] ; „ 
ADDENDA ET CORRIGENDA. 
P. 5. An undescribed variety of Acanthocles bronni , from the Lower 
Permian of Moravia, is recorded as Acanthodes gracilis , 
var. micracanthus, A. Ezehak, Yerhandl. k.-k. Geol. 
Reichsanst. 1881, p. 79. 
Pp. 9, 10, 11, 13. Since the earlier sheets were printed, Dr. P. H. 
Traquair has published (Ann. Mag. Nat. Hist. [6] vol. vi. 
1890, p. 481) an outline-figure of Acanthodes sulcatus and 
another of Acanthodes mitchelli (this under the generic 
name of Mesacantlius). He also admits (ibid. p. 491) the 
definition of Acanthodes nitidus as formulated on p. 9 of 
the present Catalogue. 
P. 26. Diplcicanthus striatus and D. longisjoinus are also recorded 
by Traquair (Joe. cit. p. 482) from Achanarras, Caithness, 
the second under the name of Rhaclinacanthus longi- 
sjoinus. 
P. 63. In the absence of any information as to the change of form 
exhibited by Chimseroid teeth during growth, the follow¬ 
ing specimens may be regarded as not improbably the 
mandibular teeth of very young individuals of Ischyodus 
beaumonti. At present, however, the determination is 
doubtful. 
