ACTIXOPTERl’GII. 
3(54 
its hinder extremity and the end of the upper caudal lobe; pelvic 
fins arising opposite the origin of the dorsal, and the anal fin 
comprising about 9 rays, opposed to the hinder portion of the 
latter. 
It is not improbable that the skull from the Lithographic Stone 
of Nusplingen, Wiirtemberg, described under the name of Strobi- 
loclas suevicus (F. A. Quenstedt, Der Jura, 1858, p. 809, pi. c. 
fig. 10), also pertains to this species. The type specimen is pre¬ 
served in the University Museum, Tubingen, Wiirtemberg. 
Form. 6f Loc. Lower Kimmeridgian (Lithographic Stone) : Bavaria. 
37366. Plaster cast of type specimen ; Solenhofen. 
Purchased , 1863. 
P. 952. Fish O’155 in length, well preserved but chiefly as an 
impression ; probably from Solenhofen. Nineteen sup¬ 
ports are distinctly shown in the dorsal, and nine in the 
anal fin. Egerton Cott. 
P. 953. Immature fish wanting the head and the greater part of 
the fins : Kelheim. Egerton Coll. 
Megalurus elongates? Agassiz. 
1839-44. Megalurus elongatus, L. Agassiz (ex Munster, MS.), Poiss. 
Foss. vol. ii. pt. ii. p. 148, pi. li. figs. 1, 2. 
1851. Megalurus elongatus , A. Wagner, Abh. k. bay. Akad. Wiss., 
math.-phys. Cl. vol. vi. p. 70. 
1851. Megalurus polyspondylus, A. Wagner (ex Miinster, MS.), ibid. 
vol. vi. p. 71. [Nearly complete fish; Palaeontological Museum, 
Munich.] 
1863. Megalurus grandis, A. Wagner, ibid. vol. ix. p. 714. [Ditto.] 
1863. Megalurus polyspondglus, A. Wagner, ibid. vol. ix. p. 718. 
1863. Megalurus elongatus , A. W T agner, ibid. vol. ix. p. 719. 
1873. Megalurus polyspondylus?, V. Thiolliere, Poiss. Foss. Bugey, 
pt. ii. p. 22, pi. viii. fig. 1. 
1881. Megalurus polyspondylus , B. Vetter, Mittheil. k. mineral.-geol. 
Mus. Dresden, pt. iv. p. 116. 
1887. Megalurus polyspondylus , K. A. von Zittel, Handb. Palaeont. 
vol. iii. p. 234, fig. 247. 
Type. Nearly complete fish ; Palaeontological Museum, Munich. 
A species attaining a length of about 0*45. Head with oper¬ 
cular apparatus occupying not more than one-fifth of the total length 
of the fish, and the depth of the caudal pedicle contained more than 
five times in the length from the hinder border of the operculum to 
the base of the middle caudal fin-ravs. Vertebrae about 60 in 
