EUGNAXHIDiK. 
343 
fulcra in front of the dorsal fin; and the form of the 
trunk is evidently somewhat deepened by crushing. 
Egerton Coll. 
41856. A small fish, 0*24 in length, showing the characteristic 
ornamentation of the scales, with imperfect head and 
wanting the greater part of the caudal fin ; Lyme Regis. 
Relatively large teeth are shown in the upper jaw. The 
neural and hsemal arches of the axial skeleton of the 
trunk are well calcified, but there are no distinct indica¬ 
tions of skeletal elements in the notochordal sheath. 
Large fulcra are shown on the upper lobe of the caudal, 
but the other fins are too imperfectly preserved to show 
whether similar fulcra were present or absent. The 
ornamentation of the scales is very conspicuous in the 
abdominal region: there are stouter rhombic scales on 
the atrophied upper caudal lobe, and two stout median 
scales occur at the base of the lower lobe of the caudal 
fin. Purchased, 1870. 
Caturus insignis (Kner). 
1866. Eugnathus insignis, R. Kner, Sitzungsb. k. Akad. Wiss., math.- 
naturw. Cl. vol. liv. pt. i. p. 306, pi. i. 
Type. Nearly complete fish ; Innsbruck Museum. 
A species attaining a length of about 0 - 4. Length of head with 
opercular apparatus about equal to the maximum depth of the 
trunk and contained nearly four-and-a-half times in the total length 
of the fish; depth of caudal pedicle equalling about half the 
maximum depth of the trunk. External bones ornamented with 
fine granulations and rugae; mandibular teeth robust and in part 
striated; operculum twice as deep as broad. Pelvic fins arising 
immediately in advance of the dorsal, which arises at about the 
middle point of the back and comprises 17 rays ; anal fin with 
11 rays, smaller than the dorsal, and arising opposite the hinder 
extremity of the latter. 
Form. Sf Log. Upper Trias : Seefeld, Tyrol. 
Not represented in the Collection. 
The following species, known only from imperfect specimens, 
are remarkable for the large size and robust proportions of their 
teeth. They are commonly described as Conodus , Strobilodus , Thlat- 
todus, and Ditaxiodus , but have as yet exhibited no characters by 
which they can be distinguished from Caturus . 
