CESTRACIONTID.®. 
329 
P. 1295. Remains of a large head, the pterygo-quadrate cartilage 
originally measuring about O' 11 in length ; Snodland, 
Kent. Several teeth are preserved, and only differ from 
those of S. duhnsiensis in the remarkable smoothness of 
their coronal surface ; the shagreen-granules resemble 
those of this species ; and the fragmentary cartilages also 
exhibit no notable differences. It thus seems probable 
that the fossil pertains to S. dubrisiensis, and indicates 
the large size to vehich this fish sometimes attained. 
Eijerton Coll. 
S3mechodus tenuis, sp. nov. 
Type. Detached anterior tooth, shovrn in PI. XI. fig. 21. 
Coronal cusp of the largo anterior teeth more slender and pro- 
duced than in the type species, the superficial wrinkles less conspi- 
cuous, and apparently confined to the basal portion of the crown ; 
base-line of the crown much arched. 
Form. Loe. Xeocomian : Kent. 
9297. The t5q)c specimen, shown, of three times the natural size, 
in PI. XI. fig. 21, and two less perfect teeth; I.ower 
Greensand, Maidstone. Mantell Cod. 
39218. Tooth ; Maidstone. SowerbanJe Coll. 
Synechodus recurvus (Trautschold). 
18/ 7. Sphmodus recurxms, II. Trautschold, Bull. Soc. Imp. Nat. Moscou, 
pt. ii. p, 3.3.5, pi. V. fig. 4. 
Type. Detached anterior tooth. 
The specimens mentioned below indicate a large species, with the 
teeth of the anterior half of the jaw so similar to those of Syne- 
ehodvg that it may bo provisionally associated with this genus. 
The principal cone is high and compressed, and all the lateral cones 
slender, pointed, and well separated ; superficial ornament confined 
to short vertical wrinkles at the base of the crown. The base-line 
of the dental crown is almost straight, and the anterior margin of 
the flattened root crimped. 
If the generic determination be correct, the most posterior teeth 
still remain unknown. 
Form. Loc. Cenomanian : S. Russia. Gault : Kent. 
P. 6562. Two fragmentary teeth ; Cenomanian, Saratov, Russia. 
By exchange, 1888. 
