HYBRIDS -ZEBRA, OR AMERICAN CHAR AND TROUT. 261 



On November 29th, three more* were removed for examination, and with the 

 following results : — Specimen no. 1 was blind of the left eye, but the colours on 

 its two sides were similar, and like no. 2, except having two instead of one band 

 across the dorsal fin. Seventeen rows of scales between the adipose dorsal fin 

 and the lateral-line. Specimen no. 2, eyesight normal. The finger-marks were 

 broken up into arched bands, or circles enclosing spaces, the ground colour being 

 yellowish : the upper surface of the head and back spotted and marked with 

 black dots : the dorsal fin with a dark band across its centre and a dark spot at 

 the base of its first ray. Twenty-two rows of scales between the adipose dorsal 

 fin and the lateral-line. Specimen no. 3 had the right eye absent, the ball having 

 retracted into the socket, while the left eye was almost blind, the pupil being 

 reduced to a narrow slit, and a black spot was present on the sclerotic. When 

 alive this fish appeared as a semi-albino, markings were present, but light in 

 colour on both sides, more especially so on the right. Fifteen rows of scales 

 between the adipose dorsal fin and the lateral-line. 



March 12th, 1884. — Upwards of 20 were found to be dead, so the next day they 

 were removed to the upper planked pondf at Howietoun, into which 211 were 

 turned, but some appeared to be very weakly. In three of these fish a remarkable 

 change had occurred in the colour of their fins, the ventral, anal and caudal having 

 become of a carmine red. One which was 21 in. long happening to die, I found 

 that its left eye had never been developed, while in the right one there were 

 adhesions between the iris and subjacent structures. In a second the left eye had 

 not been developed, while the right eye had suffered from congenital malformation. 

 The longest fish was a little over 3i in. in length. 



August 28th, 1884. — About 190 of these fish existed and were in excellent 

 condition, and their appearance was very beautiful. J 



Teeth. — In a triangular transverse row across the hind and lateral margins of 

 the head of the vomer, followed by three or four more teeth placed in a single 

 series along the anterior half of the body of that bone : these posterior teeth, 

 which may be four in number, are in a single median line, so far as I have had 

 the opportunity of examining, and are always present as seen in fig. 52, 2 and 2a 

 (p. 270), showing either that deciduous vomerine teeth may exist on the body of 

 the vomer in char crossed by trout : or else, that instead of a double row of teeth 

 along the body of the vomer, as seen in trout, they may be reduced to a few placed 

 in a single row should such fish be crossed with char. Scales — 18 to 22 rows 

 between the base of the adipose dorsal downwards and forwards to the lateral-line. 

 Colours — yellowish shot with purple and reticulated with irregular black bands, 

 spots, and markings along the body, but most spotted on the upper surface of the 



No. 1, 

 in inches. 

 * Length of example . . 2-7 . 

 ,, „ head . . 0'6 . 



„ „ caudal fin . . 0.4 . 

 Height of body . . . 0-5 . 

 t Pond no. 3, twenty feet long, five wide, and containing about 36 inches of water. 

 { The following is a description of two specimens removed from the pond, the second being 

 the one figured on plate xi. 



B. X, D. 13 (^y, P. 13, V. 9-10, A. f, C. 19, L. 1. 128-140. 

 CsBC. pyl. 37-39, longest J inch. 



Inches. Inches. 



Totallength 6-7 . 160 



Length of head ■ 1-5 . 2-5 



Length of pectoral fin 1-0 . 1-6 



Length of ventral fin 08 . 1'3 



Length of caudal fin .10. 2-1 



Height of body 1-5 . 2-8 



Eyes, diameter of 0-3 . 0-5 



Eyes from end of snout 0-1 . 09 



Eyes apart 1-5 . I'O 



Distance from snout to dorsal fin 28. 5'3 



Distance from base of pectoral to base of ventral fin . . 1'3 . 37 

 Distance from base of ventral to base of anal fin . . 1-2 . 2-0 



