L’ALiEONlSCIDiE. 
513 
Gyrolepis quenstedti. Dames. 
1888. Gyrolepis quenstedtii, W. Dames, Falseont. Abliandl. 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 
fin excessively elongated. Scales relatively small, ornamented with 
delicate, well-spaced, oblique striae; hinder margin not serrated. 
Form. § Loc. Upper Trias (Lettenkohle): Biebersfeld,Wiirtemberg. 
Not represented in the Collection. 
Gyrolepis agassizi (Munster). 
1835. Amblypterus ayassizii, G. von Munster, Neues Jahrb. p. 333. 
1835. Amblypterus ayassizii, L. Agassiz, Poiss. Foss. vol. ii. pt. i. p. 105. 
1848. Amblypterus ayassizii, C. G. Giebel, Fauna der Vorwelt, Fisehe, 
p. 253. 
1857. Rhabdolepis ayassizii, F. H. Troschel, Verhandl. naturh. Vereins 
preuss. Rheinl. u. Westph. vol. xiv. p. 16. 
1864. Amblypterus ayassizii, F. von Alberti, Ueberbl. Trias Alpen, 
p. 210/ 
1868. Rhabdolepis ( Amblypterus ) ayassizi, Ik von Willemoes-Sulmi, 
Neues Jahrb. p. 831, 
1888. Gyrolepis ayassizii, W. Dames, Palaeont. Abliandl. 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 striae, 
in most cases parallel with the superior and inferior margins ; 
hinder margin not serrated. /?z<^>* 
Form. Sf 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 Munster, Beitr. Petrefakt. iv. (1841), 
p. 140, pi. xvi. fig. 15.—Muschelkalk ; Tyrol. [Scale.] 
Amblypterus latimcinus, C. G. Giebel, Fauna der Yorwelt, Fisehe 
(1848), p. 255.—Muschelkalk; Esperstadt. [Head and 
pectoral fin.] 
PABT II. 2 L 
