MA.CR0SEMIID2E. 
175 
Part of the cranial roof is shown, and some of the 
superior circumorbital bones are preserved. 
Purchased , 1889. 
P. 3614. Part of a trunk with displaced squamation, showing some 
ring-vertebrae immediately behind the position of the 
pelvic fins ; Swanage. Enniskillen Coll. 
46421. Imperfect head and portion of trunk ; Tisbury, Wiltshire. 
Cunnington Coll. 
Histionotus oberndorferi, Wagner. 
1863. Histionotus oberndorferi, A. Wagner, Abh. k. bay. Akad. Wiss., 
matk.-phys. 01. vol. ix. p. 650, pi. iii. 
1887. Histionotus oberndorferi, K. A. von Zittel, Handb. Palaeont. 
vol. iii. p. 218, fig. 231. 
Type. Imperfect fish, wanting caudal region ; Palaeontological 
Museum, Munich. 
An imperfectly known species, differing from H. angularis in the 
more acute angulation of the dorsal margin and in the more 
coarsely serrated character of the scales. 
Form. Sf Loc. Lower Kimmeridgian (Lithographic Stone): Ba¬ 
varia. 
49135. Plaster cast of type specimen ; Kelheim. Purchased, 1878. 
Histionotus falsani, Thiolliere. 
1873. Histionotus falsani, V. Thiolliere, Poiss. Loss. Bugey, pt. ii. 
p. 14, pi. v. fig. 1. 
Type. Much-fractured fish; Lyons Museum. 
A species about equalling the type in size, but the maximum 
depth of the trunk considerably exceeding half its length, and the 
head with opercular apparatus at least as deep as long. 
Form. Sf Loc. Lower Kimmeridgian (Lithographic Stone) : Cirin, 
Ain, Prance. 
Not represented in the Collection. 
An imperfect small fish in the Dresden Museum, from the 
Bavarian Lithographic Stone, is also regarded as indicating a dis¬ 
tinct species, Histionotus parvus, by B. Tetter, Mittheil. k. mineral.- 
geol. Mus. Dresden, pt. iv. (1881), p. 48, pi. ii. fig. 5. 
