CTETOCERATTD^. 
285 
Locality. Karlstein, Bohemia. 
Kepresented in the Collection by two examples. 
Cyrtoceras (Meloceras) decipiens, Barrande, sp. 
1867. Cyrtoceras decipiens, Barrande^ Syst. Sil. de la Boheme, vol. ii. 
pt. i. p. 544, pi. cxlvii. ff. 30-38, pi. clix. ff. 25-33. 
1877. Cyrtoceras decipiens^ Barrande, ibid. Suppl. et S^r. tardive, 
p. 135, pi. dxxxv. ff. 4-12, pi. dxxxix. ff. 3-12. 
Char. Curvature very slight ; upon a chord of 60 millim., 
subtending the concave side, the highest perpendicular is only 
2 miUim. The transverse section is elliptical; the ventro-dorsal 
diameter is to the transverse as 7:6. The rate of increase in a 
length of 45 millim. in the septate part of the shell is in the ratio of 
1 to 5. The body-chamber occupies about | of the total length of 
the adult shell. The distance between the septa amounts to about 
g of the corresponding ventro-dorsal diameter. The siphuncle is 
situated close to the convex border of the shell, without touching 
the test. The ornaments of the test consist of regular transverse 
plications which have an upward imbrication ; these are covered 
with fine, close-set, transverse lines. The plications become coarser 
in the upper part of the shell, especially upon the body-chamber. 
JRemarJcs. A comparison has already been made between this 
species and M. velox, Barr. sp. (q. v.). It may also be compared with 
M. inversum, Barr. sp. (pi. civ.), which, however, has a more rapid 
rate of increase and a proportionately longer body-chamber. 
Horizon. Etage E (= Salopian). 
Locality. Lochkow, Bohemia. 
Represented in the Collection by two imperfect specimens. 
Cyrtoceras (Meloceras) intermedium, Barrande, sp. 
1848. Cyrtoceras intermedium^ Barrande, Haidinger, Berichte fiber die 
IVlittheil. von Freund, d. Natm’wiss. in Wien, Band iv. p. 209. 
1852. Cyrtoceras intermedium, Giebel, Fauna der Vorwelt, Band iii. 
Abth. i. p. 209. 
1867. Cyrtoceras intermedium, Barrande, Syst. Sil. de la Boheme, 
vol. ii. pt. i. p. 552, pi. cxlvii. ff. 27-29, pi. cxlix. ff. 13-17, pi. cl., 
pi. cH. ff. 22-27. 
1877. Cyrtoceras intermedium, Barrande, ibid. Suppl. et S6r. tardive, 
p. 29, pi. ccccxxvii. ff. 26-40. 
[Abi 1882. Cyrtoceras intermedium, Blake, British Foss. Ceph. pt, i, 
p. 179, pi. XX. f. 6, &c.] 
