20 



Part first. 



Tank No. 10. 



It contains the large kinds of Fishes. Thie following are conspi- 

 cuous. The Sea-Perch {Serranus, fig. 56) heavy, often motionless 

 for a long time in mid-water or in the stream of entering water and 

 air-bubbles, and frequently in characteristic sloping position ; red- 

 dish-brown, mottled white, no silver. Bass {Labrax, fig. 54), salmon- 

 shaped, with silver scales. Sea-Crow {Corvina, fig. 55), dark, with 

 dark lower fins. Gilthead {Chrysophrys, fig. 34), oval and blunt- 

 headed, with white marks over the eyes (effect of light in this tank) 

 and black splotches on the sides of the neck (see Tank 5). The 

 Angler-Fish {Lophius, fig. 57), lying always on the ground; brown 

 and ragged with tufts like sea-weed and with enormous jaws. Conger- 

 eel {Conger, fig. 58), four or five feet long and eel-shaped. Dog- 

 fishes and Sharks, with the mouth under the head and five gill-slits 

 on each side of the neck; moving with a lithe motion. Smooth- 

 hound {Mustelus, fig. 59), a small grey shark. Spotted Dog-fish 

 {Scyllium, fig. 60), generally heaped on the bottom against the glass. 

 Sting-ray ( Trygon, fig. 62), with black wings and long black tail. 

 Angel-fish {Squatina, fig. 61), big and grey. 

 Reptiles. Turtle {Thalassochelys, fig. 63). 



On a dead coral-branch near the right wall of the tank hang 



one or more Dog-fish eggs. 



Fig. 54. Lairax /npus(Ba.ss), 

 Ve nat. size. p. 114. 



Fig. 55. Coivina nigra (Sea-crow), 

 1/3 nat. size. p. 1 1 5 



