LIMNyCA EMARGINATA AND THE VARIETY MIGHELSI OF 

 FISH RIVER LAKES. AROOSTOOK COUNTY, MAINE. 



In 1821, Thomas Say published in the Journal of Academy of 

 Natural Sciences of Philadelphia. Limnasa emarginata discovered by Mr. 

 Aaron Stone in lakes of Maine. 



Mr. Alexander W. Longfellow, a brother of the poet Longfellow, 

 while exploring and surveying the northeastern boundary in the summer 

 of 1842, discovered in Second Eagle lake a Limnaea, named by Dr. J. 

 V/. Mighels L. ampla. and published in the Boston Journal, Natural 

 History, Vol. IV, 1843. Mr. A. W. Longfellow asserts this specie was 

 very abundant on the shore in Second Eagle lake, summer 1842, but he 

 had no means of preserving any more than four specimens. 



Prof. Edward L. Morse and John M. Gould made a careful survey 

 of Mud lake in 1852 and found but six or seven dead specimens. See 

 journal of the Portland Society of Natural History, Vol. I, 1864. 



To my knov/ledge there has been no further notes made of this very 

 interesting shell of Aroostook. My first visit to Square lake in June, 

 1889, one large shell was picked up at the inlet. In August, 1891, and 

 September, 189^, five specimens were obtained. In August, 1893, a good 

 lot of shells were obtained at the same locality and sent to Prof. H. A. 

 Pilsbury of Philadelphia for identification. Prof. Pilsbury wrote me thus : 

 "Give particular attention to collecting a good lot of Limnasa emarginata 

 and especially the variety mighelsi. as they are very interesting." 



In company with Lars Nylander, I passed three weeks during August 

 and September, 1894, and made a collection of fossils and shells at Gross, 

 Square, Eagle and Portage lakes and many fine specimens were secured. 

 Some lower Helderberg fossils were discovered in Eagle lake. Corals, 

 Crinoid stems, Strophomena rhomboidalis, Wlk., Orthis varica. Con.. Tre- 

 matospira Multistriata Hall and Platyceras. Nils Esbjornson assisted 

 me during a three weeks' trip in 1896, and special attention was given to 

 the collection of living shells of Fish river. By careful search around the 

 shores of the lakes and by dredging in the deep water, many interesting 

 specimens were secured. The dredge used was sent me by Bryant Walk- 

 er, Esq. of Detroit, and many valuable favors have been received from 

 him. In regard to the large pond snails sent him, he wrote as follows: 

 "The Limnasas are by all odds the finest I have ever seen. Our Michigan 

 samples do not begin to compare with them." 



