x.wi 
SYSTEMATIC INDEX. 
Family ISCHXACAXTIliDJE 
v 
Isehn acanthus 
gracilis 
Paco 
20 
20 
21 
Family DIFLACANTH'ID-E 
Diplacanthus . 
-striatus 
-longispinus 
Climatius . 
-- rcticulatus . 
-scutigcr 
—— uncinatus . 
--macnicoli . 
-- grandis . 
——— gracilis . 
-(?) ornatus. 
-(?) latispinosus 
Parexus 
-incurvus 
-falcatus 
9 -> 
23 
24 
2G 
23 
28 
29 
30 
30 
31 
33 
33 
34 
34 
Subclass HOLOCEFHALI. 
Order CH1M2EBOIDEI . . . 
Family PTYCTODONTIDJE . 
Ftyctodus . 
llhynchodus . 
Palsc-oinylus . . , 
36 
.36 
Q *- 
o t 
33 
39 
39 
Fami 
Squaloraja 
-- polyspondyla 
- tcnuispina 
Chalcodus 
40 
40 
41 
43 
43 
