JET. 29.} CABOT TO THOREAU. 157
pects may be the Esox estor, or Maskalonge ; he has seen this at Albany. ... As to the minks, etc., I know they would all be very ac ceptable to him. When I asked him about these, and more specimens of what you have sent, he said, I dare not make any request, for I do not know how much trouble I may be giving to Mr. Thoreau ; but my method of ex amination requires many more specimens than most naturalists would care for." (June 1.) " Agassiz is delighted to find one, and he thinks two, more new species ; one is a Pomotis, the bream without the red spot in the operculum, and with a red belly and fins. The other is the shallower and lighter colored shiner. The four dace you sent last are Leuciscus argenteus. They are different from that you sent before under this name, but which was a new species. Of the four kinds of minnow, two are new. There is a black sucker {Catastomus nigri- cans), but there has been no specimen among those you have sent, and A. has never seen a specimen. He seemed to know your mouse, and called it the white-bellied mouse. It was the first specimen he had seen. I am in hopes to bring or send him to Concord, to look after new Leucisci, etc." Agassiz did afterwards come, more than once, and examined turtles with Tho reau.
