NATURAL HISTORY. 
2. S. Caturus. Spotted Dog Fish, Fleming's 
Brit. Ani. p. 165, (Scyiirum.) Common. 
3. S. Mustreztus. Smooth Hound, Leach in 
Wern. Mem. 2. p. 63. Flem, Brit. Ani. p. 166, 
(MusTrEeLus Lz&vrs.) 
4, S. Acanturas. Common Dog Fish, Flem, 
p- 166. (Sernax.) Common. ji 
5 S. Gravucus. Blue Shark. Brit. Zool. 3. 
p. 109. Fiem. p. 167. (Carcuartias.) This 
is the species that visits the Cornish and 
Devonshire coasts, in the Mackerel and Pilchard 
seasuns. 
6. S. Vuupes. Sea Fox or Thresher. Borlases’ 
Cornw. p. 265, Flem. p. 167. (CarRcHaRias.) 
An occasional visitor, 
RAIA. 1. Torpepo. Cramp Fish, Brit. Zool. 3. 
p. 89. Flem. p. 169. (TorrPepo VuLGaris.) 
2. R. Pastinaca. Sting Ray. Brit. Zool. 3. p. 95. 
Flem. p. 170. (Trreon.) Not unfrequent on 
our coast. 
3. R. CLavata. Fhorn Back. Brit. Zool. 3. p. 93. 
Common. 
4, R. Microcenxrata. Wern. Mem, 2. p. 450. 
South-west coast of Devon.—Montagu. 
3. R. Batis. Skate. Brit. Zool. 3. p. 82. Common. 
ACIPENSER. Srurio. Sturgeon, Donovan’s 
British Fishes, t. 65. Occasionally wanders 
into ouk rivers, and has been caught both in the 
Clyst and Dart. 
In this genus the gills are free, in all the preceding 
ones fixed. 
