332 Records of the Indian Museum. [Voi^. X, 



length 66/^, nodulus 20m from end; inner couple 75/^ long, nodulus 

 31^1 and 33/' from end. 



In a bundle of three, the outer (most laterally situated) seta 

 is the shortest, and is especially short from nodulus to tip; the 

 innermost seta has the opposite characters, and the intermediate 

 seta is intermediate also in measurements ; thus : — 



outer, length 64/^, nodulus to tip 21/*. 

 middle, ,, 71/^, ,, 26;u. 



inner, ,, 75/*, ,, 34,/. 



In the outer setae of the bundles the nodulus is therefore rela- 

 tively nearer the distal end. 



Of the remaining anatomical characters it may be noted that 

 there are no coelomic corpuscles; that chloragogen cells begin 

 in segment vi, and that there is a fairly well-marked stomachal 

 dilatation in x, or ix and x ; that the first nephridium is in x ; and 

 that there aiefour vascular loops, in segments vii — x (Michaelsen 

 gives the loops as 5-6; Bousfield as 5, and notes that the last is 

 much the smallest). 



Aulophorus furcatus (Oken). 



The material on which the following account is based was 

 brought from a ditch on the borders of Lahore City b}' L. Shiv 

 Ram Kashyap, Professor of Botany in Government College, who 

 handed it over to L. Karam Narain, Demonstrator in Biology. 

 From him I received thousands of specimens matted together with 

 a filamentous alga. 



From the masses of this matted material the posterior ends of 

 the worms projected, the expanded funnels with the gills looking 

 like miniature flowers. These retract immediately if the mass is 

 touched, but not if the table is jarred. From a few small masses, 

 consisting mainly of the tangled bodies of the worms, the anterior 

 end of the animals were projecting ; these stretched themselves 

 out and attached themselves to the floor of the glass dish, appa- 

 rently trying to pull themselves along, the attachment being by 

 means of the mouth, and the pharynx probably acting as the plug 

 of a sucker (compare the action of the pharynx in A. tonkinensis , 

 Annandale ap. Michaelsen, 4 ; and Stephenson, 11). In specimens 

 examined on the slide the pharynx was seen to be continually 

 advanced as far as the mouth aperture and then retracted, but it 

 was not actually protruded from the mouth. 



The length of the worms is b — 16 mm.; the longer are chains 

 of two individuals. The breadth is about '2 mm. The number of 

 segments, in a double animal, is 46 — 48, plus an undifferentiated 

 zone posteriorly ; but there may be more than 40 in a single 

 animal, without any sign of fission. N=i8, 22, 23, 24, or 25, 

 and is thus not constant. 



Four new seta-bearing segments, i.e., five in all, are intercala- 

 ted at the zone of fission to form the head of the posterior animal. 

 Thus, since the dorsal setae in this species begin on segment v. 



