82 



WEALDEN AND PUB-BECK FOSSIL FISHES. 



Traces of similar scales also occur in E. pectoralis, some fragments overlying the 

 pelvic bones being especially clear (PL XVII, fig. 7 b). The onlyfulcral scales are 

 at the base of the upper lobe of the tail. 



Horizon and Locality. — Middle Purbeck Beds : Vale of Wardour, Wiltshire. 



Family Eugnathid.e. 

 Genus CATURUS, Agassiz. 



Caturus, L. Agassiz, Neues Jahrb. f. Mm., etc., 183-4, p. 387. 



Urseus, L. Agassiz, Poiss. Foss., vol. ii, pt. i, 1833, p. 12, (non Urieus, Wagler, 1830). 



Conodus. L. Agassiz, torn, cit., pt. ii, 1844, p. 105 (name only). 



Strobilodus, A. Wagner, Abhandl. k. bay. Akad. Wiss., math.-pliys. CI., vol. vi, 1851, p. 75. 



Fig. 26. — Caturus furcatus, Agassiz; restoration, scales omitted, much reduced in size. — Lower Kinmierid- 

 gian (Lithographic Stone); Bavaria. 6}-., branchiostegal rays; co. , circumorbitals ; &., dentary ; fr., 

 frontal; ma;., maxilla; na., nasal; op., operculum ; orb., orbit; pa., parietal ; pel., postelavicular jjlates ; 

 pmx., premaxilla ; pop., preoperculum ; pt., post-temporal ; smx., supramaxilla ; so., postorbitals ; sop., 

 suboperculum ; sq., squamosal ; s£., supratemporal. 



Endactis, P. M. G. Egerton, Figs, and Descripts. Brit. Organic Remains (Mem. G-eol. Surv.), dec. ix, 



1858, no. 4. 

 Thlattodus, R. Owen, Geol. Mag., vol. iii, 1866, p. 55. 

 Ditaxiodtis, R. Owen, torn, cit., 1866, p. 107. 



Generic Characters. — Trunk elongate-fusiform. External head-bones and 

 opercular bones feebly ornamented with rugae. and tuberculations, all except the 

 cheek-plates robust ; upper circumorbitals subdivided into small tessera? ; snout 

 obtusely pointed, and maxilla straight or with a somewhat concavely arched 

 dentigerous border ; teeth relatively large and tipped with enamel, arranged in a 

 sparse series on the margin of the jaws, smaller on the palatine and on the 

 splenial, where they are in single series anteriorly, minute and almost granular on 

 the other inner bones ; preoperculum narrow, nearly smooth ; operculum deep, 

 much broader below than above, and suboperculum of moderate size. Ossifications 

 round the notochord insignificant or absent in the smaller species, consisting only 

 of separate hypocentra and pleurocentra in the largest species ; ossified ribs 



