415 
CCELA-CANTHIDiE. 
Genus COCCODERMA, Quenstcdt (emend. Reis). 4 a “$'C. 
[Der Jura, 1858, p. 810 ( KoJcTcoderma ).] 
Supplementary caudal fin stout and prominent, the rays of all 
the fins broad and robust, often expanded, and closely articulated 
in the distal portion; small granulations on the preaxial rays of 
the first dorsal and caudal fins. External ornament consisting of 
sparse tubercles, which become numerous and spinous on the scales ; 
parafrontal and circumorbital bones plate-like, without superficial 
excavations. 
This genus was founded upon a detached pterygo-suspensorial 
bone, described as a problematical fossil by Quenstedt. The definition 
here given is based upon the researches of 0. M. Reis (Paheontogr. 
vol. xxxv. 1888, p. 60), who recognizes three species, of which 
there are no specimens in the Collection :— 
• &9J. 
Coccoderma gigcis , 0. M. Reis, loc. cit. (1888), p. 57, pi. iii. 
fig. 17-19.—Lithographic Stone (Lower Kimmeridgian); 
Bavaria. [Jaws; Munich Museum.] 
Coccoderma substriolatum, 0. M. Reis, ibid. p. 51: Macropoma 
substriolatum , T. H. Huxley, Pigs. & Descrips. Brit. 
Organic Remains (Mem. Geol. Surv. 1866), dec. xii. 
p. 39, pis. ix., x.—Kimmeridge Clay ; Cottenham. [Skull 
and portion of trunk ; Woodwardian Museum, Cambridge.] 
Coccoderma suevicum, L. A. Quenstedt, Der Jura (1858), p. 810 
pi. 100. fig. 14; 0. M. Reis, Joe. cit. p. 51, pi. v. figs 
° 4, 8, 11, pi. iv. fig. 16 : Undina major , A. Wagner, 
4r math.-phys. Cl. k.-bay. Akad. Wiss. vol. ix.(1863), p. 697: ^ p J 
0^ ‘ Coelacanthus major , R. von AVillemoes-Suhm, Pabeontog 
vol. xvii. (1869), p. 82.—Lithographic Stone (Low 
Kimmeridgian); Wiirtemberg and Bavaria. [Pteryg 
suspensorial bone ; Tubingen Museum. Type species.] 
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Undefined fragments from the Bavarian Lithographic Stone are also 
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namect Coccoderma nudum, Reis (loc. cit. p. 60, pi. iii. fig. 16, pi. v. 
fig. 1), and C. bavaricum , Reis (ibid. p. 60, pi. v. fig. 2). The 
types are in the Munich Museum. 
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Genus HEPTANEMA, Bellotti. 
[C. Bellotti, in A. Stoppani, Studii Geol. e Paleont. Lombardia, 
1857, p. 435.] 
Fin-rays robust and straight, not expanded, and only articulated 
for a relatively short extent distally; the preaxial rays of the first 
dorsal and caudal fins with a double series of upwardly-pointed 
