CLUPEIDJ5. 
147 
Head and trunk much laterally compressed and abdomen com- 
pressed to an edge. Maxilla robust and arched, with two supra- 
maxillary bones; mandible a little prominent, and gape not extending 
heyond the hinder border of tho orbit ; toeth rudimentary or 
absent. Preoperculum only slightly expanded ; operculum and 
suboperculum deep and narrow ; branchiostegal rays about 6 or 8 in 
number. Vertebras from 45 to 60 in number, tho centra much 
constricted and strengthened with few longitudinal ridges. Pairod 
ns of moderate or small sine ; dorsal fin small and short-based, 
opposed to the pelvic pair ; anal fin with less than 30 rays ; caudal 
n deeply forked ; no fin-rays excessively elongated. Scales of 
moderate or large size, not pectinated ; a series of thickened 
ri dge-seales, with ascending lateral wings, extending along the 
ventral border from the pectoral arch to the origin of the anal fin ; 
no dorsal ridge-scales ; lateral line inconspicuous. 
Clupea scheuchzeri, Blainville. 
1708, Figure by J. J. Scheuchzer, Querelee Piscium, pi. ii. 
1756. Figures by G. \V. Knorr, Samml. Merkwiirdigk. Natur, pi. xxi. 
figs. 2, 3. 
1818. Clupea scheuchzeri, H. D. de Blainville, Nouv. Diet. d’Hist. Nat. 
vol. xxvii. p. 315. 
®I® - Clupea megaptera, H. D. de Blainville, ibid. p. 315. 
1886. Meletta scheuchzeri, A. Wettstel'n, Fischfauna Tertiaer. Glarner- 
scliief. (Denksclir. schweiz. Palaeont. Ges. vol. xiii.), p. 52, pi. i. 
fig. 4, pi. iii. figs, 6, 8, 10, (P) pi. viii. fig. 0. 
%>«• Imperfect fish; Paris Museum of Natural History. 
•A. species of slender proportions, attaining a length of about 025, 
nnt not satisfactorily definable on account of imperfect preservation. 
bdominal vertebrae about 22, caudals 24 in number. Length of 
e<id with opercular apparatus somewhat exceeding the maximum 
°f the trunk and equalling one quarter of the total length to 
the ^ase of the caudal fin. Dorsal fin with about 12 rays, not 
extending behind quite so far as tho middle point between the 
occiput and the base of the caudal fin ; pelvic fins arising opposite 
the middle of the dorsal, midway between the pectorals and the 
at, al ; the latter fin relatively small. 
If the specimens labelled Clupea megaptera by Agassiz are 
correctly determined, the type specimen described by de Blainville 
^nder this name must have been somewhat distorted and with 
'“complete dorsal fin. 
Form, Loc. Oligocene : Canton Glarus, Switzerland. 
Fine specimen about O' 13 in length, labelled Clupea 
l 2 
