SCOPELID^. 
245 
Leptosomus guestphalicus, W. von der Marck. 
1863. LejJtosomus guestphalicus, W. von der Marck, Palaeontogr. 
vol. xi. p. 50; pi. viii. figs. 4, 5. 
Tyjpe. Imperfect fish ; Academy of Minister, Westphalia. 
The type species, attaining a length of about O’l. Length of 
head with opercular apparatus contained twice, and maximum depth 
of trunk between three and four times in the length from the 
pectoral arch to the base of the caudal fin. Vertebrae approximate]}’' 
33 in total number, the centra slightly longer than deep. Pelvic 
fins with 8 rays, arising opposite or immediately in front of the 
origin of the dorsal fin; dorsal fin with 2 undivided and 9 divided 
rays, nearly as deep as the trunk at its origin, arising at the middle 
point between the end of the snout and the base of the caudal fin ; 
anal fin scarcely less elevated, with two undivided, and 9 or 10 
divided rays, arising well behind the dorsal, but somewhat nearer 
to the pelvic pair than to the caudal fin. 
Form. Loo. Upper Cretaceous: Westphalia, j 
P. 3828 a, P. 3841. Two typical specimens ; Sendenhorst. 
Ennishillen OoU. 
35036. Imperfect distorted specimen ; Sendenhorst. 
Purchased, 1860. 
P. 2110. Small distorted fish on slab with other remains ; Senden¬ 
horst. Egerton Ooll, 
Leptosomus elongatus^ W. von der Marck. 
1868. Leptosomus elongatus^ W. von der Marck, Palaeontogr. vol. xv. 
p. 286, pi, xliii. fig. 3. 
1885. Leptosomus elongatus, W. von der Marck, ibid. vol. xxxi. p. 256. 
Tg^e. Imperfect fish ; Academy of Munster. 
A slender species, attaining a length of about 0*1. Length of 
head with opercular apparatus contained about three times, maxi¬ 
mum depth of trunk about six times in the length from the pectoral 
arch to the base of the caudal fin. Pins almost as in the type 
species, but anal relatively larger and more remote. 
Form. Loo. Upper Cretaceous : Sendenhorst, Westphalia. 
^^ot represented in the Collection. 
Leptosomus macrourus, Pictet & Humbert. 
1850. Clupea minima, F. J. Pictet, Poiss. Foss. Mt. Liban, p. 41, 
pi. vii. fig. 4 {errore'). 
