548 PROCEEDINGS OF THE NATIONAL MUSEUM. 



The prostomiuni consists of a single partial ring. The united third 

 and fourth rings form the posterior margin of the anterior sucker. 

 Somites III to XXII are complete, XXIII consists of anuuli sixty-three 

 and sixty-four, XXIV of sixty-five, which is double at the margins, 

 XXV of sixty-six and XXVI of sixty-seven, behind which is the anus. 

 The male pore is placed at Xa§, or between the annuli twenty-five and 

 twenty-six ; the female at Xl^r^, or between twenty-seven and twenty- 

 eight. 



Character is given to the papulation by the great development of 

 the dorsal median series, the papillse of which are very large, and in 

 some specimens the only ones distinctly developed. They become con- 

 spicuous on annulus fifteen, and are found on the first annulus of 

 every complete somite thereafter, and on the annuli sixty-three, sixty- 

 five, sixty-six, and sixty-seven. In the best preserved material they 

 may be traced as far forward as annulus six. The mates are separated 

 at the middle line by about one-fourth oi the width of the body. The 

 dorsal inner-lateral papilke are also well marked on most specimens, 

 and are found on the eye-bearing annuli, as well as on all those bear- 

 ing the dorsal median ones. The outer lateral papillae have become 

 reduced to almost total suppression and were unnoticed by Grube. 

 Very minute members of this series may usually be found on the 

 eye-bearing and several succeeding ijapilliferous annuli. Besides the 

 serial papillte, very minute variable ones are found on the dorsum of 

 all of the annuli. There are 10 or 12 small papilla on the ventral 

 surface of the first ring of each somite. 



On the accompanying label Dr. Stejneger gives the following descrip- 

 tion of the colors of this species during life: 



Olive green, margins more brownish, two series of large whitish knobs along the 

 back, and several smaller and less conspicuous spots between these and the margins. 

 Along the back a regular system of narrow brownish longitudinal stripes. 



This species closely resembles the Clepsine elegans of Verrill, from 

 which it may be distinguished by the much larger dorsal median 

 papilhe. 



Xo. 4259, U.S.X.M. Bering Island, Commander Islands, Leonhard 

 Stejneger. 1882-83. Twenty-two specimens. 



3. GLOSSIPHONIA PARASITICA. 



Hirudo parasHica Say. 



CAepsine ornata Veruill (in part). 



I have not yet acquired suflQcient material to satisfy myself of the 

 status of Verrill's species of Clepsine; but it is certain that both G, 

 ornata and C. 2)apiUata are composite and in part synonymous. The 

 types should be again studied and compared. I think that the forms 

 here included can safely be regarded as cospecific with those forming 

 the basis of Verrill's original description of Clepsine ornata, and their 

 identity with Say's species was established by the examination of the 

 supposed types in the collection of the Philadelphia Academy of 



