132 BOARD OF AGRICULTURE. 



striolata ; Yoldia thraciasformis. At Pemaquid outer and inner 

 harbor I found in abundance, in from three to seven fathoms, Echi- 

 nerachnius atlapticus, on sandy, nullipore bottom. 



I had now arrived at Casco bay, and here I spent some days 

 visiting and exploring the numerous islands, bays, inlets and chan- 

 nels of this beautiful locality. At Jewell's Island, at the lowest 

 tide mark, I found the Pholas crispata imbedded in peat and logs, 

 usually covered with from two to three feet of water at ordinary 

 low tides. At this place, beneath the surface of the water and 

 extending to some distance from the land, is a submerged tract 

 thickly covered with the remains of a forest visible in smooth times 

 of water and in the early morning. It was with considerable diflS- 

 culty that I was able to procure specimens of the Pholas. 



On the Brown Cow and the Green Islands, which are nearly des- 

 titute of vegetation, I found the following land shells in abundance, 

 viz : Helix nemoralis, (wood snail,) Helix albolabris, (white-lipped 

 snail,) and Succinia obliqua. On Eagle Island, a short distance 

 from the above. Helix alternata occurs in great numbers. 



Almost every island in the bay has a moUusk peculiar to itself, 

 and coincident with its soil or flora; Eagle Island bearing spruce 

 and fir, producing Helix alternata, while one of the Goose Islands, 

 with a hard wood growth, produces Helix albolabris abundantly. 



This completed the labors in this branch of the survey for the 

 season. The specimens collected were carefully preserved, and 

 are deposited for the purpose of identification and arrangement in 

 the hall of the Portland Society of Natural History. Glass jars 

 and alcohol will be required for their permanent preservation, and 

 should be provided at the earliest opportunity. 



In consequence of the limited time during which my work was 

 performed, you will readily perceive that this report must be quite 

 imperfect ; in fact the work was in its nature hardly more than 

 preliminary. The process of collecting specimens and making 

 explorations in this department of science is attended with so many 

 difficulties arising from the state of the weather and of the tides, 

 together with the necessary exposure and labor, that a complete 

 examination of so extensive a range of coast as that of Maine, 

 and a thorough classification of its fauna is unavoidably slow. I 

 can, however, assure you that what has been done has been done 

 well, and that the specimens enumerated above are but a very 

 small proportion of those actually taken and preserved. The col- 



