Fig. 2, 3, 4, 5 and 6, plate 3, are the most common forms found, in 

 from one to two feet of water. Fig. 12-20 on the same plate is found 

 living on the rocks at low water mark. Fig. 1, a very large shell, was 

 found on the other side of the bar in three feet of water. Fig. 1-2, plate 

 4, were obtained in the main current at the inlet and is a very rare form. 

 Fig. 3-1 1 are some of the largest specimens found, and the extreme vari- 

 ations of this shell is remarkable and nothing in existence in this part of 

 the country its equal. Fig. 12 on this plate is a broken shell to show the 

 internal form of the spire or columella, as it is generally called. All fig. 

 are natural size. 



At the south end of Square lake large specimens, similar to those 

 above, are sometimes found on the beach after storms. Square lake is one 

 of the largest and handsomest lakes in Maine and empties in Eagle lake 

 through a thoroughfare, 4 miles long. The water in Eagle lake is deep, 

 and only a few large shells have been found. See plate 2, fig. 12-14. 

 Eagle lake, 18 miles long and 2 miles wide, forms the main basis for the 

 south and east branches of Fish river and empties in the St. John river 

 at Fort Kent. This stream has cut its canal through slate ledges of the 

 Oriskany formation, and near Fort Kent I have collected crinoid stems, 

 Leptocaslia flabellites. Conn., Platyceras and Fucoides in abundance. 

 Probably all the slate for 20 or more miles to the west might be included 

 in the Oriskany group. At the mouth of Fish river is a large gravel bar 

 running out into the St. John river, and between this and the point where 

 the old Blake house stands is a small colony of Limnasa emarginata Say. 

 See plate 2, fig. 29-34. The specimens are of small size, and the interest- 

 ing fact is, they correspond in general with those found at Mud lake; the 

 largest specimens are found at Square lake. The small shells at Fort Kent 

 and Mud lake compare very well with a colony of Limnasa emarginata Say 

 found in Aroostook river at Caribou. See plate 2, 15-17. Caribou is 

 30 miles from Mud lake and 44 miles from Fort Kent. 



Portage lake, on the south branch of Fish river is about half way of 

 this branch. At Oak Point and along the east side of this lake specimens 

 of medium size of Limnasa emarginata var. mighelsi, Benn., are some- 

 times found in two or three feet of water. See plate 2, fig. 18-22. The 

 specimens in this lake are more frequently adorned by light colored bands 

 than any of the others. 



Portage lake empties in Eagle lake through an 18-mile thoroughfare, 

 including Saint Froid lake. Small colonies are also found in several places 

 along the gravel bars.. See plate 2, fig 23-28. The specimens are about 

 the same size as those in Aroostook river. 



The 85 figures on the four plates are all natural size, and will give a 

 good idea of the great variations in the Limnsa emarginata. This is also 

 a record of all the localities where I have found these interesting shells in 

 Aroostook county, Maine. 



Caribou Maine, Oct. 1901, 



