296 ROBERT CHAMBERS, JR. 



And, lastly, the somatic chromosome number I have found to 

 be 12, the same as that of the European viridis. 



I see no reason why this form should not be entitled to the 

 exclusive rights of the name Cyclops riridis Jurine; and C. Artie r- 

 icanus, C. parcus, and C. brevispinosus, each with its distinctive 

 chromosome number, spinal armature for the swimming feet,- and 

 seminal receptacle, be raised to the rank of separate species. 



That the individuals I have just secured are not to be classed with 

 C.ingens Herrick I conclude from Herri ck's statement ('95) that tin- 

 latter is merely an exaggerated form of C. Americanus. Neither 

 are they to be compared with the forms which Miss Byrnes 

 describes as C. in gens (?) for this latter species Miss Byrnes 

 distinctly states as possessing the brevispinosus spinal armature 

 of the swimming feet. My individuals, on the other hand, 

 possess the parcus spinal armature for both the outer and inner 

 rami of the swimming feet, and this armature is identical with 

 that of the European viridis. 



LITERATURE CITED 

 Braun, Alex. 



'09 Die specifische Chromosomenzahlen der einheimischen Arten der Gattung 



Cyclops. Arch. f. Zellf., 3. 

 Byrnes, E. F. 



'09 The Freshwater Cyclops of Long Island. Cold Spring Harbor Monographs, 



VII. Pub. by Brooklyn Inst. of Arts and Sc. 

 Claus, C. 



'93 Neue Beobachtungen liber die Organisation und Entwicklung von Cyclops. 



Arb. Zool. Inst. d. Univ. Wien, Bel. 10. 

 Gates, R. R. 



'09 The Stature and Chromosomes of CEnolhera gigas DeVries. Arch. f. Zellf., .}. 

 Haecker, V. 



'97 Die Keimbahn von Cyclops. Arch. f. mikr. Anat., 49. 



'03 Uber das Schicksal der elterlichen u. grosselterlichen Kernanteile. Jen. 



Zeitschr.. 37. 

 Herrick, C. L., and Turner, C. H. 



'95 Synopsis of the Entomostraca of Minnesota. Geol.Nat. Hist. Surv. of Minn. 

 Marsh, C. Dwight. 



'10 A Revision of the North American Species of Cyclops. Trans. Wis. Acad. 



Sc. and Letters. 

 Schmeil, O. 



'92 Deutschlands frcilebende Siisswasser-Copepoden. I. Theil, Cyclopid.r. 



Bibl. Zool. (Leuckart u. Chun), Heft 11. 

 Wolf.Eugen. 



'05 Die Fortpflanzungsvcrhaltnisse unserer einheimischen Copepoden. Zool. 

 Jahrb. Syst., 22. 



