CCELACA.XTHIDJE. 
411 
Form. Sf Loc. Lower Ximmeridgian (Lithographic Stone) : 
Bavaria. 
49143. Plaster cast of type specimen, figured by von Zittel, tom. Fit. 
p. 175, woodc. f. 177 ; Zandt, near Eichstiidt. 
Purchased , 1878. 
37032. Imperfectly preserved fish, in counterpart, wanting the 
terminal caudal fin ; Solenhofen. An external ornament 
of large elongated tubercles, closely arranged, is seen upoii 
a hone probably pertaining to the mandible. 
Haberlein Coll. 
P. 5543. Well-preserved specimen, 0-4 in length, wanting portions 
of the head and the terminal caudal fin ; Eichstiidt. A 
few large conical teeth and some of the sclerotic plates 
are exhibited; and below the mandible is the impression 
of a large jugular plate of which a fragment shows the 
ornament. The scales of the flanks are ornamented by 
short striae, fewer and more elongated than those upon 
the scales figured by von Zittel as U. acutidens. 
Purchased , 1888. 
It still remains doubtful whether the following supposed distinct 
species is not founded upon a young individual of U. penicillata :— 
TJndina minuta, A. Wagner, Abh. math.-phys. Cl. k.-bay. Akad 
AA iss. vol. ix. (1863) p. 697 ; 0. M. Reis, Palaeontogr. vol. 
xxxv. (1888), pp. 6, 30, 36, pi. i. fig. 1 : Caslacanthus 
minutus, B. von Willemoes-Suhm, Palaeontogr. vol. xvii. 
(1869), p. 79, pi. xi. fig. 4 : Undina cirinensis, Y. Thiolliere, 
Poiss. Loss. Bugey, pt. i. (1854), p. 10.—Lower Eimme- 
ridgian (Lithographic Stone); Cirin, Ain, Prance, and 
Bavaria. [Palaeontological Museum, Munich.] 
Undina gulo (Egerton). 
1861. Holophagus gulo, Sir P. Egerton, Figs. & Descrips. Brit. Organic 
Remains {Mem. Geol. Surv. ), dec. x. p. 19. 
1866. Hoi op hag us gulo, T. H. Huxley, ibid. dec. xii. p. 26, pi. xi. 
1872. Holophagus gulo, T. H. Huxley, ibid. dec. xiii. no. 10, pi. x. 
Type. Fish, wanting head ; Museum of Practical Geology. 
A large species, attaining a length of about 0-7. Trunk robust; 
head and opercular apparatus occupying one quarter of the total 
length. Dorsal fins well developed, the first consisting of about lu 
relatively stout rays, the second and the anal comprising more 
