58 CATECHISM OF 



the rest of the body of a bright silvery hue. It in- 

 habits the European seas, and at certain seasons 

 is found in great abundance in some of the rivers 

 of England. 



Q. What is remarkable in the Groenlandicus ? 



A. Salmo Groenlandicus, or the Greenland 

 Salmon, is about seven inches in length, and of a 

 pale green colour ; it is remarkable for having the 

 scales of its sides upright, by means of whch se- 

 veral of these fish will be united, as though glued 

 together, so that if one be taken the whole are 

 caught. 



Q. What is the Thymallus ? 



A. Salmo Thymallus, or the Grayling Salmon, 

 called by some, the Umber, is an elegant spe- 

 cies, and grows to the length of about eighteen 

 inches. It resembles the trout in shape, but is 

 rather more slender 5 and is of a beautiful silvery 

 grey colour, with numerous stripes ; it is a highly 

 esteemed fish, and is found in many of the rivers 

 of England. 



Q. Are there many species in the genus Fistu- 

 laria ? 



A. In the genus Fistularia, or Pipe Fish, there 

 are but few species, of which the Fistularia Taba- 

 caria, or Slender Pipe Fish, will be a sufficient 

 example. It grows to the length of three or four 

 feet, resembling an eel in shape, but having ahead 

 nine inches long, the mouth toothless and pointed 5 



