82 



THE NAUTILUS. 



mediate vicinity. During the field work, 18,440 specimens 

 were collected, of which, 9335 were mollusks. Ecological notes 

 were made on all of the species in connection with the environ- 

 ment and with the associated animals. The discussion of these 

 topics, many of which are of an economic nature, will be pub- 

 lished as a technical bulletin by the New York State College of 

 Forestry, and the interested reader is referred to this publica- 

 tion for details concerning these and kindred subjects. 



When the field work was made for the material upon which 

 Technical Bulletin Number IV (page 89) is founded the deeper 

 water of the west end of the lake was examined with a crowfoot 

 dredge, and, naturally, only a few mussels were obtained. For 

 the field work of 1916 a large dredge with a 16-inch frame was 

 used with very satisfactory results, a large number of clams as 

 well as gastropods being collected. When these results were 

 tabulated an interesting variation in bathymetrical distribution 

 was observed. This is indicated in the table below: 

 Table showing decrease of mollusks with depth. 



Shore to six inches .... 6 species 



1 to 3 feet 46 species 



3 to 6 feet . . . . .40 species 



6 to 9 feet 39 species 



9 to 12 feet 29 species 



12 to 15 feet 26 species 



15 to 18 feet 11 species 



Lower South Bay is the largest embayment of Oneida Lake and 

 is situated at the southwest end. It is about one by two miles 

 in extent and covers an area of approximately 881 acres. It is 

 well protected on the north by Long Point which extends east- 

 ward into the lake for nearly a mile, forming an effectual bar- 

 rier to the heavy north and northwest storms. Between Long 

 Point and Short Point (see the map in Technical Bulletin, IV) 

 lies Short Point Bay where the water is usually quiet and the 

 habitats are sheltered from strong waves. The greater part of 

 the shore is of sand or clay, a very small proportion being of 

 gravel and boulders. The deeper water has a mud bottom. 

 The 881 acres included in the area of Lower South Bay is divided 

 as follows: 



