Two Neiv Sjiecics of Australian Land Leeches. 159 



ventral surface, is a distinct, white, lateral line, along which the 

 nephridia open, a pair in each segment. 



At the posterior end certain white patches occur on the dorsal 

 surface which seem to be constant. 



On the 85th and 86th annuli on each side of the mid-dorsal 

 line is a small oval patch of white nearer to the lateral line, and 

 extending into the 84th is a similar area, and contirming this 

 posteriorly from the 89th to the 92nd is a white line. On either 

 side of the median line is a diamond-shaped area extending from 

 the 90th into the 89th and 91st annuli. A triangular patch 

 occurs at the extreme posterior end, the apex being in the mid- 

 dorsal line of the 93rd annulus and the base along the 95th. 



Segs. I. -III. ai'e indistinguishable, but are represented by the 

 first three pairs of eyes which, however, are not borne on 

 separate annuli. 



Seg. IV. represented by 4th, 5th and 6th annuli, bears the 

 fourth pair of eyes on an annulus not separated from segment 



in. 



Seg. V. consists of 7th, 8th and 9th annulus, the fifth pair of 

 eyes being on the 7th annulus. 



Seg. VI. consists of 10th, 11th and l'2th annuli, the most 

 anterior of these bearing the segmental sense organs. 



Segs. VII.-XXII. consist of five annuli each; the first annulus 

 always carries the segmental sense organs, and on the last opens 

 the nephridiopore. 



Segs. XXIII.-XXXIII. are represented by tlie last three 

 rings, 93, 94, 95, and the acetabulum as seen by the ganglia. 



There are in this form ten segmental sense organs on the most 

 anterior annulus of each segment, six on the dorsal side of the 

 lateral line, and four on the ventral. Of the three dorsal pairs 

 the middle one corresponds to the eye, and the outer pair is 

 placed close to the lateral line. Of the two ventral pairs the 

 outer pair is nearer to the mid-line than in the case of the 

 dorsal. 



Habitat. Moss Vale, New South Wales (T. Steel, Esq.). 



Anatomical Notes. 

 With regard to the anatomy of these new forms, in the main 

 they resemble Philamon pungens. There are, however, certain 

 points to which attention may be called. 



