r226 NEW YORK STATE MUSEUM 



whatever walls of wood or stone there are on the sides of the 

 harbor, Fuciis has found a secure foothold. None of the algae 

 common to deep rocky bottoms are found here therfe being no 

 active movement of the waters. x4.morphous plant matter is 

 washed in with the fresh water. 



The barnacle, Balanus, is found incrusted on the stones in 

 the bed of the stream and seems to locate wherever there is 

 an active movement of the salt water. Clusters of the mussels, 

 Mytilus and Modiola, are seen along the muddy banks and 

 among the grasses. Associated with these are the marine 

 worms Nereis, Lumbriconereis and Rhyncobolus. Higher up in 

 the banks burrow the fiddler crabs, Gelasimus. Out at the 

 mouth ofi the inlet, the fresh water at low tide spreads out and 

 the pebbly bottom farther out becomes thinly covered with silt 

 which extends ever deeper to the mud flats of the basin. In the 

 silty deposits along the sides are found diatoms, amorphous 

 plant matter and such forms as Daphnia, Gammarus, Cyclops 

 and Ilyanassa. 



At one side of the course of the fresh-water stream is a 

 gravelly bar in whic^h thrives the soft-shelled clam, Mya, from 

 2 to 8 centimeters in length. 



At one side of the Gut and extending around the western 

 corner of the basin is a sea wall through which is a passageway. 

 On the bottom of this are Mya, Mytilus and Modiola. Along 

 with the snail, Ilyanassa, is the oyster drill, Urosalpinx, whose 

 empty cases the hermit crab, Eupagurus, occupies. Then too, 

 anemones, Halocampa and Sagartia, are found in the bed, the 

 last named being fastened to stones. The crustaceans Crangon 

 and Palaemonetes along with young Fundulus hover about the 

 Fucus on the wall. Palaemonetes are infested with an Isopod 

 parasite underneath the carapace of the thorax. 



At the outer end of the basin along the bar, but out beyond 

 the growth of eelgrass and where the Ulva is not too thick, 

 Squilla is found living in burrows which extend in a zonelike 

 area around the basin. These burrows run a few inches below 

 the surface of the mud, and have two openings about 2 to 



