OSTRACODA FROM S( )I TIIKAs rKKX MASSACHU- 

 SKT'IV 



JOSEPH A. CUSIIMW 



That the Ostracoda of New England have l.eeii u'lvaily ne^docted 

 may at once be seen by a reference to Miss Hailil>nir> list of tlie 

 New England Crustacea. At the time of its [nihlication there 

 was a single species reported from New Miin;laii(l and tliat from 

 but one locality. With a view to supplying this lack of records 

 in a slight measure, some collecting has been done in our ponds, 

 mainly about Boston. Several persons have kindly Mipplied 

 material which has now been placed in the collections of the Boston 

 Society of Natural History. Seven species are reported here^ 

 making the number of species now known from the fresh water 

 of New England, nine instead of one. All of the records so far, 

 however, are from Massachusetts. 



It has been a matter of interest to find the local distribution of 

 the species. Where a species is found at all it is usually abundant. 

 Of the three species of Cypris reported, all were found in ponds 

 in the vicinity of Boston and but a short distance apart, yet no one 

 collection contained more than a single species. 



A number of other species have been collected but in immature 

 condition or in insufficient numbers for complete diagnosis. 



The measurements given are average ones for the material 

 examined. As a rule, if adults alone are taken there is a noticeable 

 constancy in measurements but in cases where the collection con- 

 tains the young also, the range in measurements is considerably 

 greater. 



It is to be hoped that more collecting will he done in the near 



siderable addition to tlu" ]>re^ent list should he made. The seven 

 species representing live genera are given below. 



