140 College of Forest ry 



prehensive comparisons with any otlier areas that may be 

 studied in a similar manner. 



Comparison with Localities Outside New York State. 



As few surveys from the quantitative standpoint have been 



made in this country, it is not possible to make extensive 



comparisons with other localities. A few interesting cjuanti- 



tative studies have been made by members of the United 



States Bureau of Fisheries which occur incidentally in reports 



of the mussel surveys of the central w^est, and these are of 



interest and value in connection with the present studies. 



Wilson and Clark ('12, pp. 19-20) made a count of the 



number of mussels in a portion of a canal (which had become 



dry) near Fort Wayne, Indiana. In an area 15 by 10 feet 



(the authors state that the width of the stream was wider 



than the mussel bed) 116 mussels were counted, as noted 



below : 



Ouadntia nihigiiwsa (Lea.).. 11 Lainfsilis lifjaniriitiiia (Lam.) 5 



Quadrula cylindrica (Say).".. i Lainpsilis liitcola (Lam.).... 6 



(Juadrula undiilata (Barnes). 86 



Atlodonta grandis (Say) 6 Total 116 



PtxcJwhranchus phaseolus = 



(Hildreth) i 



At another place in the canal, 10 feet square, the following 



species and individuals of mussels were noted: 



Quadrula ruhiginosa (Lea)... 6 Aiiodonta grandis (Sa}') 15 



Quadrula undnlata (Barnes). 60 Obovaria circnlus (Lea.).... 4 



FIcurohcina clava (Lam.)... i > Lantpsilis Hgaincntina (Lam.) 5 



A I a s in i d n t a truncata 1 Lampsilis lutcola (Lam.).... I 



(Wright) 2 Lainpsilis vcntricosa (Barnes) 4 



Symphynota c o in plan a I a 



( Barnes) 2 Total 105 



Symphynota costata (Raf.).. 5 ' 



Another count from a square meter (10.7(3 square feet) of 



bottom gave 



Qiiadnda ruhiginosa (Lea)... g Lampsilis Hgaincntina (Lam.) 2 



Quadrula undulata (Barnes) 36 Lampsilis lutcola (Lam.).... 3 



Symphynota c m p I a n a t a ■ 



(Barnes) I Total numhcr of mussels 81 



Anodonta grandis (Say) 17 = 



Obovaria circnlus (Lea) 11 Campcloma 34 



Lampsilis iris (Lea) 2 Plcuroccra 23 



Total number of mollusks 138 



