A. LT. Leach—Bagshot Beds, Shooters Hill, Kent. 405 
the abdominal region, but above the vertebral column there are remains 
of calcifications along the lateral lme; while both here and over the 
whole of the caudal region there is a curious mottling (Fig. 2c) 
suggestive of a fine and delicate squamation. 
Though in all respects a typical eel, the fossil now described 
evidently represents one of the more generalized and primitive forms 
of the group. Its relatively large supraclavicle, its conspicuous 
hypural bones, as well developed as those of a very young Anguilla,' 
and its extensive squamation, are all characters of low degree. The 
relatively great depth of its dorsal and anal fins is also noteworthy. 
Among known primitive eels it is distinguished by its large and 
powerful crushing teeth, and it may therefore be referred to a new 
genus under the name of Mylomyrus. The species, defined by its 
general proportions and by its vertebral and fin formula already 
detailed, may be known as I. frangens. 
EXPLANATION OF PLATE XXXIII. 
Fic. 1. Solea eocenica, sp. nov. ; fish nat. size, with head (1a) and caudal fin (16) 
enlarged three times. ocene: Tura, near Cairo. 
Fic. 2. Mylomyrus frangens, gen. et sp. nov.; fish one-half nat. size, with (2a) 
head, etc., nat. size, (20) caudal fin enlarged twice, and (2c) portion of 
trunk showing scales, enlarged twice. Ibid. 
ag. articulo-angular; 67. branchiostegal rays; cl. clavicle; co. 
coracoid; c. cranium; d. dentary; mz. maxilla; m. neural spine; 
op. operculum; plv. pelvic fin-supports; pmzx. premaxilla; pop. pre- 
operculum ; ptf. postfrontal ; gw. quadrate; sc/. supraclayicle. 
VII.—Norte on a SEcrron IN PROBABLE BacsHot Brps on SHOOTERS 
Hirt, Kent. 
By A. L. Lzacu. 
N 1905 trenches for electric mains were carried up the north- 
eastern slope of Shooters Hill, along Shrewsbury Lane to ‘‘The 
Bull”, and thence down the western hill-slope along the Dover Road. 
From about 350 O.D. in Plum Lane to 424 O.D. at ‘‘The Bull” the 
trench ran for nearly two-thirds of a mile along the junction of the 
London Clay with the overlying group of sands, pebbles, and clayey 
gravels which form the ‘ gravel cap’ of Shooters Hill. Neither the 
exact age of these superficial deposits nor their mode of formation— 
whether marine or fluviatile beds—is as yet known, but the general 
coarseness of the sands, the presence of pebbles of Lower Greensand 
chert, and the very stiff clayey matrix of the gravel distinguish them 
from typical Bagshot Beds, and moreover throughout the greater part 
of the section a sharp and irregular junction could be traced between 
them and the brown London Clay. At a few points, however, 
the top of the London Clay was seen to pass into pale-brown and 
yellowish sandy clays, sometimes of significant thickness. Thus in 
the Dover Road, about 100 yards above Christ Church, below the 
thick red clayey gravel of the ‘cap’, lay about 3 feet of yellow loam, 
the lower part of which became a pale-brown clay passing quite 
1 J. A. Ryder, ‘‘ On the Origin of Heterocercy’’: Ann. Rep. U.S. Fish. Comm., 
1884 (1886), p. 1051, pl. iv, fig. 4. 
