REPORT OF THE ASSISTANT ZOOLOGI8T 



645 



Note 1. 



Unio alatus, Say.— De Kay says that " Dr. Newcomb has obtained 

 very fine specimens from the Northern canal, near Waterford." Dr. 

 De Kay was correct in his identification of N. alatus. He may have 

 quoted the wrong locality. The word " fine " in his note about 

 Newcomb's specimens would indicate that they were living specimens 

 taken in their natural station and not dead specimens which had been 

 transported from a distance. 



Of this occurrence of this species in this vicinity of Waterford 

 Aldrich says: " In the spring of 1867, the canal was searched for it, both 

 above and below Waterford, for several miles, without success. Mr. 

 H. Rousseau of this city found a single valve in the canal at the weigh 

 lock." 



The Museum collection contains several specimens of the species 

 from Lake Champlain and several from Onondaga county. 



Note 2. 



Unio pressus^ Lea. — Described under the name of Unio compressus 

 The type specimens were obtained from Norman's Kill, about two 

 miles south of Albany. 



Note 3. 



Unio Tappanianus, Lea. — In most systematic lists Unio Tap- 

 panianus and Unio pressus are widely separated. I have placed them 

 next to each other because of their resemblance in general appearance 

 aud in beak sculpture; and because Tappanianus is more or less 

 symphynote like pressus. 



Note 4. 



Unio luteulus, Lamarck. — This species is rare everywhere east of 

 Mohawk, if, indeed, it occurs at all east of that point. There are no 

 specimens in the Museum collection from the vicinity of Troy or 

 Albany and only one specimen from Mohawk. In Onondaga county 

 the species becomes quite abundant and is plentiful throughout the 

 western part of the State. The only evidence known to me of the 

 occurrence of the f-pecies in this vicinity is that of Mr. Chas. T. Simp- 

 son. In the Nautilus for January, 1892, he records the species from 

 " Cohoes Falls, Hudson R." 



The following is extracted from a letter received from Mr. Simpson 

 in February, 1892. "Specimen No. 85437 (of the U. S. Rat. Museum) 

 is labeled Unio luteolui, Lam., Cohoes Falls, Hudson R. The name is in 

 Dr. Lea's writing, but I think the locality is marked by some one else. 



