
THE PROPAGATION OF THE GOLDFISH 

of a distant object to be thrown on the retina at all, consequently the 
condition is one of near sightedness, or of an optical adjustment for very 
near objects. The conditions of life * * “ would in their restricted quarters 
actually foster the development of near sightedness, and any variation in 
that direction would actually tend to be preserved. * * * The name 
telescope fish in allusion to the protruding eye-balls becomes a misnomer, 
as the form of the eye is distinctly myopic and short-sighted, and not 
hypermetropic or far-sighted, as required of an optical organ having tele- 
scopic capacity.” The Chinese designation ‘‘Dragon-eyes,” would better 
apply to these breeds of goldfishes. 
E Z 
ee) a 
| = on 
Nn 7) s 3S 
3 2 P 2 
< = g ry) 
ms ° ‘3 E 
B a S| 
5 5 
=] ¥ 
=k < 
as 
Common Goldfish. 5 
Double-tailed Japanese Goldfish. 4 All measurements 
Telescopic-eyed Goldfish. in millimeters. 
No. I - - 6 
No. 2 - - 9 

Dr. S. Watase, in writing “On the Caudal and Anal Fins of Gold- 
fishes” states that in his opinion, artificial selection has produced the 
abnormal forms of all the fins, and that in all goldfishes, irrespective 
of what breed, the tail fin is 
\ above all other parts subject 
és to the greatest variation. 
JK It is found in one of the 
following states: 1, it has three 
1 2 3 5 
lobes, one median and two 

< 
Fig. 57. Diagram of the vertebra and tail-rays of Goldfshes. | lateral; 2, it consists of two 
Single tail of the Common Goldfish. : ‘ved \ o1V)} 
Tripod tail of the Chinese and Japanese Goldfishes. Sepabate halves ( part d) siving 
Webbed tail of the Chinese and Japanese Goldfishes. rise to a four-lobed tail (the 
Double tail of the Japanese Fantail Goldfish. = ap st 
Double tail of the Japanese and Chinese Fringetail and Telescope a Olsuo-W0; ) and Bone lo Vieht= 
Goldfishes. 
nPwne 
ical and normal. In the first 
two classes, the lobes are more or less horizontally spread. The simplest 
transition state from single to double, is seen when the tail, normal in all 
other respects, has the ventral edge slightly furrowed by a median groove. 
oF 
