﻿?A1lB0NI8C1D,E. 513 



Gyrolepis quenstedti, Dames. 



1888. Gyrolepis quenstedtii, W. Dames, Palseont. Abhandl. vol. iv. 

 p. 152, pi. xv. fig. 2. 



Type, Caudal region ; University of Tubingen. 



A smaller species than the type. Trunk elegantly fusiform ; 

 dorsal fin arising very slightly in advance of the anal, and the latter 

 tin excessively elongated. Scales relatively small, ornamented with 

 delicate, well-spaced, oblique striae ; hinder margin not serrated. 



Form. Jj' Loo. Upper Trias (Lettenkohle) : Biebersfeld, Wurtemberg. 



Not represented in the Collection. 



Gyrolepis agassizi (Miinster). 



1835. Amblypterus agassizii, G. von Miinster, Neues J ahrb. p. 333. 

 1835. Amblypterus agassizii, L. Agassiz, Poiss. Foss. vol. ii. pt. i. p. 105. 

 1848. Amblypterus agassizii, C. G. Giebel, Fauna der Vonvelt, Fische, 



p. 253. ' 

 1857. Rhabdolepis agassizii, F. H. Troschel, Verhandl. naturh. Vereins 



preuss. Rheinl. u. TVestpk. vol. xiv. p. 16. 

 1861. Amblypterus agassizii, F. von Alberti, Ueberbl. Trias Alpen, 



p. 210.' 

 1868. Rhabdolepis (Amblypterus) agassizi, R. von Willemoes-Suhm, 



Neues Jahrb. p. 831. 

 1888. Gyrolepis agassizii, W. Dames, Palseont. Abhandl. vol. iv. 



p. 137, pi. xiii. fig. 1. 



Type. Fish, wanting extremity of tail ; counterparts in Palaeon- 

 tological Museum, Munich, and Museum of Natural History, Berlin. 



A very small species. Dorsal fin arising slightly in advance of 

 the anal. Scales relatively small, with few well-spaced sharp striee, 

 in most cases parallel with the superior and inferior margins ; 

 hinder margin not serrated. 



Form. # Loc. Lower Muschelkalk : Esperstiidt, near Schraplau, 

 Province of Saxony. 



Not represented in the Collection. 



Scales of Colobodus are often mistaken for those of Gyrolepis, 

 and have frequently been described under this generic name (see 

 Part III.). 



The specimens described under the following names are generic- 

 ally indeterminable, but may pertain to Gyrolepis : — 



Gyrolepis biplicata, G. von Miinster, Beitr. Petrefakt. iv. (1811), 



p. 140, pi. xvi. fig. 15.— Muschelkalk ; Tyrol. [Scale.] 

 Amblypterus latimanus, C. G. Giebel, Fauna der Vorwelt, Fische 



(1848), p. 255. — Muschelkalk; Esperstiidt. [Head and 



pectoral fin.] 



PART II. 2 L 



