SCTLUID^. 
341 
smooth, leaf-shaped shagreen-granules are to he observed ; 
but the structures shown in fig. 4 of Agassiz’s plate are 
the calcified tesserae of the endoskeletal cartilage. 
Egerton and EnnisknVen Colls. 
Scyllium dubium, sp. nov. 
Type. Group of teeth ; British Museum (PI. XVI. figs. 7, 8). 
Teeth with an extremelj’ slender coronal eminence, having two 
pairs of lateral denticles, the inner very long, slender, and curved, 
the outer smaller and at a lower level. 
Form. Loc. Turonian : Kent. 
47288. The tj'pe specimen, being a group of teeth associated with 
remains of cartilage and a vertebral centrum ; Lower 
Chalk, Dover. Two of the teeth are shown, enlarged 
eight times, in PI. XVI. figs. 7, 8. Gardner Coll. 
Scyllium elongatum (Davis). 
1887. ThyeUina elonyata^ J. W. Davis, Trans. Roy. Dublin Soc. [2] 
vol. iii. p. 473, pi. xiv. figs. 2, 3. 
Type. Xearly complete fish ; Edinburgh Museum. 
Teeth slender, erect, with one pair of lateral denticles ; those of 
the lower jaw much larger and fewer than those of the upper. 
Trunk very slender and elongated. Pelvic fins immediately in 
advance of the first dorsal. Second dorsal much larger than the 
first ; [anal unknown]. 
The known specimens do not attain a greater length than 0'2o. 
Form. Loe. Upper Cretaceous (Senonian) : Sahel Alma, Mount 
Lebanon, Syria. 
49521. An imperfectlj' preserved fish, 0*22 in length. The head 
and pectoral fins are well shown in outline ; also a few 
teeth of both jaws in position (PI. XVI. fig. o), displaying 
the characters noted in the diagnosis. Farchased, 18 <8. 
P- 4775. A nearly complete fish, vertically crushed and apparently 
much flattened. The j)ectoral, pelvic, and caudal fins are 
exhibited ; and indications of slender conical teeth may be 
observed in the mouth. Purchased, 1884. 
48104. Anterior portion of a more typical specimen. 
Purchased, 1887. 
49472. Imperfect young individual, showing the head, pectoral, and 
pelvic fins. Purchased, 1878. 
