NO. 1160. LEECHES OF THE U. S. NATIONAL MUSEUM— MOORE. 



547 



the papilla^ of the innermost dorsal series are transformed into deeply 

 pigmented eyes, but still retain their character as papilLe, being quite 

 as elevated as the succeeding members of the series, with which they 

 continue in perfect serial relation of position. Were any fuither evi- 

 dence required to demonstrate Whitman's view of the homology of the 

 eyes and segmental papilhe of leeches, this species would supply it. 

 Annuli one and four lack the marginal but retain the intermediate 

 painlhe. The former begin on annulus seven and continue to somite 

 XXY. The intermediate series ceases at somite XXIII, while the 

 innermost continues to the post-anal annulus. 



The ventral papillte begin on annulus seven, which is united with 

 six. They are a marginal, a mesial ventral, and two intermediate on 

 each side. The most mesial pair are widely separated and about oppo- 

 site to the mesial dorsal series. All are small, and in this specimen 

 can be detected with certainty on only a portion of the somites. 



The individual described is probably immature, as the genital pores, 

 although not difficult to detect, are very small, and their lips not 

 swollen or glandular. Tlie male pore is situated between annuli twenty- 

 nine and thirty and the female between thirty-one and thirty-two. The 

 color is probably much changed in preservation, being a nearly uniform 

 bronze brown. The eyes are black. Nothing is known of the internal 

 anatomy. 



Type. — No. 4320, TJ.S.N.M. Bering Island, Commander Islands, Sibe- 

 ria. Leonhard Stejneger, August 5, 1882, No. 1405. One specimen. 



GLOSSIPHONIA Johnson. 

 2. GLOSSIPHONIA MOLLISSIMA. 



(Plate XL, fig. 2.) 



Clepsine mollissima Grube. 



This species was described by Grube (3) from specimens collected at 

 Lake Baikal, Siberia. The following notes will serve to supplement 

 Grube's description. The first pair of eyes are very small, deeply set, 

 and sometimes united to the second pair. They appear to be undergo- 

 ing degeneration and absorption. The annulation of the first four 

 somites is shown in the following table: 



Annulation of somites of Glossiphoiiia mollissima. 



