THE NAUTILUS. 119 



DREDGING IN LONG ISLAND SOUND. 



[Report of Mr. A. H. Gardner. From the Transactions of Isaac Lea Conchological 

 Chapter of the Agassiz Association for 1893.] 



Of the species of bivalve mollusca given as dredged in Long 

 Island Sound, all are common to the waters of New York Bay with 

 the exception of Pecten irradians and Modiola modiolus. Nueula. 

 proxima has so far only been found by the writer in the curve of 

 Sandy Hook Bay, the remaining species are more abundant in the 

 bay than in the sound. 



It must be remembered that the portion of the sound dredged in 

 only constitutes a small section of it contiguous to New York City. 



The Odostomia given as bisuturalis and trifida are probably one 

 and the same thing; the distinguishing character being insignificant. 

 The specimens dredged in Lloyd's Harbor are rather smaller than 

 others, and apparently have a few more revolving lines. The calmer 

 waters of the sound seem to favor the growth of many small species 

 of univalve shells, uncommon in New York Bay, where their place 

 is probably supplied by the larger species of Nat'u-a and Fulgur, 

 which species are taken in almost every haul of the dredge in the 

 bay, and are not found commonly in the sound. 



List of localities and Mollusca dredged in Long Island Sound 

 July 15 to 22. 

 Hempstead Harbor, 2 to 4 fathoms, mud : 



Eupleura candata Say, 3; Pandora trilineata Say, 2; Midiniu 

 lateralis Say, 9 ; Area transversa Say, 1 ; Nueula pr<i:cim Sav, 12 : 

 Yoldia limatula Say ">. 



Matinicock Point, 3 fathoms, mud : 



Axtyris lunata Say, 3 ; Tritia trivtitata Say, 1 ; Pandora trilineata, 

 3 ; Nueula proxima, 34. 



Plum Point, Oyster Bay Harbor, 3 to 4 fathoms ; oyster beds : 



Tornatina eanaliculata Say 2 ; Astyrix lunata, 8 ; Urosalpinx 

 cinereus Say, 4; Fulgur eanalieulatum Say (young), Eupleura cau- 

 data 7 ; Solen americana Gould (young), Pandora trilineata, 4 ; 

 Area transversa, 7 ; Nueula proxima 21 ; Pecten irradians, 1. 



Lloyd's Harbor, 2 fathoms; mud and eel grass: 



Tornatina eanaliculata, 35 ; Bittium nigrum, 29 ; Odostomia trifida, 

 36; Turbonilla elegans, 1 ; Anachis avara Say. 7; Astyris lunata, 

 abundant ; Nassa obsoleta, abundant ; N. vibff, 2 ; Urosalpinx <-iu- 

 ereus 1; Eupleura caudata, 15; Pandora trilineata, 1; Mulinia 

 lateralis, 12 ; Lyonsia hyalinia Say, 2 ; Tellina tenera, 1 ; Area 

 transversa, 3 ; Nueula proxima, 34 ; Yoldia limatula, 1 ; Pecten ir- 

 radians, 2. 



