314 APPENDIX. 



water becomes stale, and revives of a deeper green when renewed. 

 The beUy is leaden-grey, minutely speckled. 



"The viscera of this leech are more numerous, and of different 

 formation from those of any others. When replete, they are alike 

 conspicuous, and probably less so, according as they are more or less 

 empty. They seem constructed after the same general plan, how- 

 ever, as the viscera of the complanata and stagnalis. In a small 

 specimen replete with food, they seemed to consist of eighteen pairs 

 diverging from right and left of the main trunk or stomach." — 

 (p. 40.) 



Moves like Glossopora, and, like it, carries the young under the 

 abdomen. "Early in July I observed at least 150 young adhering 

 to the belly of a specimen, which appeared very careful of them, — 

 folding its body longitudinally as if for their protection, while it 

 crawled along. The brood attached to another still remained late in 

 September." — (p. 41.) 



" I have found this animal in Coldingham Lough in Berwickshire, 

 and in the counties of Edinburgh and Linlithgow. I was indebted 

 to Sir Walter Trevelyan, Bart., for several specimens from the Island 

 of Bute. Nevertheless the species is rare, and it seems to have dis- 

 appeared entirely from some places where it dwelt a number of years 

 ago." — Dahjell. 



Glossiphonia verrucata (page r> 1 ) . 



Body, when contracted, elliptical (being narrowed and obtuse at 

 both ends and bulged about the middle), convex on the back, flat on 

 the ventral surface, of a uniform cream-yellow colour, distinctly annu- 

 lar, the rings equal, very narrow and numerous, raised and granulous ; 

 the granules in a single series and most easily seen on the ventral 

 half ; the sides thickened and crenulate. Eyes six, distinct, in three 



pairs thus • • , the anterior apparently coalescent. Oral sucker 



continuous with the body, concave, the upper lip projecting forwards 

 a little : anal sucker larger, circular, entire, unarmed, with a plain 

 thickish rim. Sexual pores distinct, more especially the anterior. 



This description is made from a specimen preserved in spirits, 

 which was about 10 lines in length. The granules on the rings do 

 not form longitudinal series, but some on the back appear a very 

 little larger than the others, and whitish, — probably from being ele- 

 vated above the surface. It could not be ascertained between what 

 rings the generative pores were placed, for they are too narrow and 

 too closely compacted to be counted with accuracy. 



Body obpyriform, elongate-elliptical or linear-elongate, of a greyish 

 translucent colour, speckled, with two parallel interrujited granulous 

 lines on the back on each side of the mesial line. Head obtusely 

 cuneiform. Eyes six, in three pairs, black and distinct. Rings 

 equal, crenulate on the margins. Back convex ; (he ventral surface 

 flat or somewhat concave. Sucker ventral, circular. 



