LEPTOLEPTDiE. 
503 
1892. Leptolepis affinis , H. E. Sauvage, Bull. Soc. Hist. Xat. Autun, 
vol. v. p. 389, pi. xvi. fig. 1 (reprinted in Bull. Soc. Sci. Yonne, 
vol. xlvii. 1893, p. 25, pi. i. fig. 1). [Nearly complete fish.] 
Type. Nearly complete fish. 
The type species, of small size, attaining a length of about 0*1. 
Head with opercular apparatus occupying somewhat less than one- 
fourth of the total length of the fish ; depth of caudal pedicle ex¬ 
ceeding one-third the maximum depth of the abdominal region. 
Width of operculum not quite equal to half the length of the head. 
Vertebras about 40 in number, the centra elongated, forming thin, 
much-constricted cylinders ; the neural and haemal arches in the 
hinder half of the caudal region comparatively robust. Pelvic fins 
arising much nearer to the anal than to the pectorals, and com¬ 
prising not less than 10 rays; dorsal with about 12 rays, arising 
immediately behind the pelvic pair and almost reaching a point 
opposite the origin of the somewhat smaller anal fin. 
Though not strictly in accordance with the rules of nomenclature, 
it seems advisable to adopt the name of bronni for this species in 
honour of its discoverer. The present writer cannot recognize any 
diagnostic characters in the English and Erench fossils separating 
them from the typical fishes of similar age in Germany ; all of the 
features noted by Sauvage being readily explained by differences in 
the state of crushing and preservation. 
Form. 4' Toe. Upper Lias: Baden, Wiirtemberg, and Bavaria; 
Normandy, Burgundy, and Lozere ; Somersetshire. 
19641-44. Two imperfect and distorted specimens, in counterpart; 
Boll, Wiirtemberg. Several of the head-bones are well 
shown. Purchased , 1845. 
22529, -a. One contorted fish and two imperfect specimens, the first 
from Boll, the others probably from Ohmden, Wiirtemberg. 
Purchased, 1848. 
36129. Pish about 0*09 in length, crushed and distorted anteriorly, 
and displaying the broad haemal spines at the base of the 
caudal fin ; Metzingen, Wiirtemberg. Purchased, 1861. 
P. 945, P. 950. Eight specimens, variously imperfect, two exhibit¬ 
ing the general form of the trunk and the position of the 
fins ; Ohmden. Egerton Coll. 
P. 3663, P. 3665. Fish about 0*09 in length, and a smaller frag¬ 
mentary specimen ; Ohmden. Enniskillen Coll. 
P. 946. Fish wanting caudal region, labelled Leptolepis jaegeri by 
Count Munster ; Ohmden. Egerton Coll. 
