10 THE NAUTILUS. 



Arriving at Cross Lake my work was immediately to collect 

 and my companion's duty throughout the journey to prepare 

 the tent, cut wood and cook, and other duties connected with camp 

 life in the woods. 



At the Cross Lake inlet the following were collected : Unio com- 

 planaius, Margaritana undulata, Anodontafragilis, Sphcerium sulca- 

 tum, Pisidium compressum, P. variabile, P. n. sp., Planorbis campan- 

 ulatus P. bicarinatus, P. deflect us, Limncea emarginata, L. desidiosa, 

 Pomatiopsis cincinnatiensis, etc. 



The second place visited was on the west side about 2 miles south 

 from the inlet. Planorbis trivolvis was obtained in a place that ap- 

 peared to be covered with water only in the Spring. Ancylus 

 parallelus was found in large numbers, and a lot of good large spec- 

 imens of Limncea emarginata in two feet of water. They seemed to 

 feed on vegetation on the rocks. A little further down on the west 

 side was a small stream in which a lot of Sphceria and Pisidia were 

 obtained. Unio complanatus Sol., Margaritana undulata Say and 

 Anodonta frag His Lam., are found all over the Fish River Lake, and 

 need not be referred to as of especial interest to any locality. 



On the east side where some large hills rise from the lake a small 

 lot was obtained by dredging ; nearest the shore Pomatiopsis cincin- 

 natiensis were plentiful in 15 feet of water ; Campeloma decisum, of 

 small size, Pisidium variabile and P. compressum were found from 

 the shore to 25 feet, showing some variation in forms. On the 

 shore Succinea ovalis, and, near by, in the woods under rocks, S. 

 avara were found. Also Conulus fulvus, Strobila labyrinth-lea, Zon- 

 ites exiguus, Carychium exiguum and fragments of Pupa or Vertigo. 



The south end of Cross Lake afforded the best dredging ground, 

 and some time was spent here. Pomatiopsis cincinnatiensis Lea, was 

 very plentiful, and Valvata tricarinata Say, V. sincera Say, were col- 

 lected from 5 to 20 feet. Planorbis trivolvis, P. companulatus, P. bi- 

 carinatus, P. deflectus and P. hirsutus were not plentiful. 



One of the most interesting collecting grounds is Square Lake, 

 which is the largest and handsomest lake in Aroostook Co. At 

 the inlet from Cross Lake the bottom is covered with large and fine 

 specimens of Limncea emarginata and the var. Mighelsi. Planorbis 

 parvus (?) Say, Planorbis sp. ?, a peculiar specimen, P. campanulatus, 

 a form of small size, P. bicarinatus, Physa ancillaria Say, are plenti- 

 ful in this place, but nowhere else in this region to my knowledge. 

 The shore is covered with dead shells of the above named species. 



