262 
SELACHII. 
P. 8198. Fossil of a very similar character to the preceding, but 
showing more anterior teeth. Egerton Coll. 
20600. A scattered group of teeth. Johnson Coll. 
20600 a. Small group of naturally arranged principal teeth, much 
abraded and broken. Johnson Coll. 
18989. Group of about twenty tooth. Purchased, 1 854. 
P. 4174. A few scattered teeth, associated with two broken cephalic 
sjnnes. Ennishillen Coll. 
32750. Group of small toeth. 
39148. Seven associated teeth. 
40092. Four teeth. 
P. 2201-2. Four teeth. 
Purchased, 1857. 
BowerhcmJc Coll. 
Purchased, 1866. 
Egerton Coll. 
P. 2203. Four groups of teeth, either of this species or of H. ran- 
costatas. Egerton Coll. 
P. 2793. Seven tooth. 
Enniskillen Coll. 
P. 2791 a. Group of small teeth, partly arranged in natural series, 
probably referable to the young or a small individual of 
this species. Enniskillen Coll. 
39784. Group of small teeth. 
Purchased, 1862. 
38103. Largo group of scattered small teeth, including some from 
the hindermost rows, associated with a fow small fragments 
of cartilage, shagreen, and portions of two “ Sjjhenonchi.” 
This specimen may be referred, without much hesitation, 
to the young of the present sjjecics Purchased, 1864. 
38127. Teeth and first dorsal fin-spine of a still smaller fish, either 
of this species or II. medius. Purchased, 1864, 
It is impossible at present to distinguish the dorsal fin-spines of 
II. delahechei from those of //. medius and II. ruricostntus, and they 
are therefore provisionally grouped together below. The dorsal spine 
of II. delahechei is shown in No. P. 3160, and that of 11. medius in 
No. P. 340; that of II, raricostatus is still unrecognized. The 
spine is robust, and the lateral ribs very numerous and closely 
