condition of the jaw, which was at right angles with the 

 vertebral column, and to the peculiar form of the tail. 



The President made some observations upon certain 

 points in the anatomy of the Blind Fish of the Mammoth 

 Cave. 



In examining the structure of the ridges upon the head, he 

 had found each ridge to consist of a series of papilte, lying close 

 together, and beneath them a branch of the fifth pair of nerves, 

 sending off smaller branches, and forming a very sensitive plexus 

 for each papilla. The larger fish also present the same ridges 

 and minute structure along the body between the head and tail. 



He had also found in the same specimens rudimentary eyes, as 

 formerly described by him ; and he had dissected out also several 

 muscles, or bundles of muscular fibres, on each side of the eye. 

 The stomach of each of the specimens contained a fish with large 

 eyes in a partially digested condition. As far as he knows, this 

 is the first instance of a fish with eyes being found in the Cave. 



Capt. Atwood observed that it was very common for 

 many fish to eat their own species. Small mackerel are 

 always found in the stomachs of large mackerel when 

 they are abundant. 



Dr. Gould reported upon the communication read at 

 the last meeting from Mr. E. S. Morse, of Portland, Me., 

 on a species of Helix. 



This species, the most minute of any yet observed, was found 

 by Mr. Morse in the vicinity of Portland, and has been collected 

 also at several localities in Massachusetts. Dr. Gould considered 

 it to be the species described by Mr. Lea, under the name of 

 Helix minutissima. It was regarded by Dr. Binney as the 

 young of II. minusciila, but Dr. Gould believed it to be a distinct 

 species. 



George N. Lawrence, Esq., of New York, was elected 

 a Corresponding Member. 



