9(30 ZOOLOGY LEECHES. 



NEPHELIS QUADR1STOIATA Grube. 



Nephelis qitadristriata GKXIBE, Famil. des Aunel., 110, 149. DIESING, Sitzuugsberichte 

 der kais. Akad. der Wiss., math.-naturwiss. Classe, xxxiii, 1859, 490. 

 VEKRILL, op. cit., iii, 1872, 133. Id., Syn. N. A. Fresh Water Leecbes, in 

 Hep. U. S. Coin. Fish & Fisheries, 1874, 675. 



Body, in extension, 2 to 4 inches long by 0.12 to 0.25 of an inch broad, 

 slender subterete, tapering to the anterior end ; in contraction broader and 

 somewhat depressed posteriorly; the sides rounded. Posterior sucker large, 

 nearly as wide as the body, to which it is broadly attached. Mouth rather 

 large, suborbicular ; the upper lip a little expanded, rounded in front, wrin- 

 kled within, smooth externally, and not distinctly annulated. The oesopha- 

 gus has the three longitudinal folds slightly prominent, rounded at their 

 anterior ends. Six ocelli were all that could be distinguished ; of these, 

 those of one pair, situated on the front of the first segment, are much the 

 largest ; two pairs, much smaller and inconspicuous, are placed well apart 

 on the sides of the buccal segment, Anal orifice large, with a raised border, 

 situated a little in advance of the posterior end of the back. 



Color above brownish-black, dark brown, fuscous, or dark cinereous, 

 with four longitudinal rows of irregular, nearly confluent, black spots, inter- 

 mingled with light brown or grayish spots, which often also form the centers 

 of the black spots. Lower surface plain brown or fuscous, usually a little 

 lighter than the back. 



Var. 1. Back with a light reddish or brownish median stripe, and a 

 broad band of blackish on each side, often more or less interrupted with 

 lighter mottlings. 



Massachusetts to Nebraska, Colorado, and California. 



Var. a, San Luis Valley, Colorado, Lieutenant W. L. Marshall, (also 

 var. &); Campo, Southern California, Dr. E. Palmer. 



CLEPSINE Savigny. 



Clepsinc SAVIGNY. VERKILL, Syu. N. A. Fresb Water Leecbes, in Rep. U. S. Com. 

 Fisb & Fisheries, 1874, C77. 



This genus is very abundantly represented in our waters, both in indi- 

 viduals and species. All of these species are apt to be quite variable in 

 character in different- localities as well as at different periods of growth. 



