Fig. 11. Invertebrate animals on sand bottom, water four feet deep. Area 

 dredged (54 square feet. The principal animals are ' ; finger-nail " shells (ttplid- 

 riitm, 1, Pisidium, 2) ; pond snails (Galba catascopium, 3) ; and small snails 

 (Amnicola, 4). Caddis-fly cases, mostly without the animal, are numerous 

 (Molanna and Lrptocell-a. 5). Head of Short Point Bay. 



