THE MAMMOTH CAVE. 89 



means of a small scoop-net, which is gently 

 carried beneath them. 



Professor B. Silliman, Jr., who visited the Cave 

 in the autumn of 1850, published the following 

 observations on the blind fish and the blind craw- 

 iish, in " Silliman's Journal" for May, 1851 : 



"Of the fish there are two species, one of 

 which has been described by Dr. Wyman in the 

 'American Journal of Science,' and which is en- 

 tirely eyeless ; some ten or twelve specimens of 

 the species were obtained. The second species 

 of the fish is not colorless like the first, and it 

 has external eyes, which, however, are found to 

 be quite blind. The crawfish, or small Crusta- 

 cea, inhabiting the rivers with the fish, are also 

 eyeless, and uncolored ; but the larger-eyed and 

 colored crawfish, which are abundant within the 

 Cave, are also common, at some seasons, in the 

 subterranean rivers, and so also, it is said, the 

 fish of Green River are to be found at times of 

 flood in the rivers of the Cave. Among the 

 collections are the larger-eyed crawfish, which 

 were caught by us in the Cave." 



For the benefit of those who may feel inter- 

 ested in the scientific characters and peculiarities 

 of the Cave fish, we will quote the observations of 

 two authorities, whose names are generally recog- 



8* 



