12 Records of the Indian Museum. [Vol. XIV, 



Genus NAIS. 

 Nais communis, Piguet var. punjabensis, Stephenson. 



Ivasauli ; July. 191'). Baiiii Prashad. Several specimens, none sexually mature. 



Nais communis, Piguet var. caeca, Stephenson. 



Along with tlie above. Several specimens, none sexually matui'e. 



It is interesting to find the blind variety of this worm along with the 

 one possessing eyespots, as was the case in the material from Travancore 

 from which the var. caeca was first described (Stephenson, 7). 



Family TUBIFICIDAE. 



Genus BRANCHIURA. 



Branchiura sowerbyi, Bedd. 



Inle Lake, Southern Shan States. In very soft mud in the open lake in 7 feet of 



water ; green plants abundant. Several batches, 19th February to 5th March, 



1917. N. Annandale. (No. W. 103-4—1.) 

 Kaung-daing, Yawnghwe State, Southern Shan States. In soft mud at edge of 



stream of warm water issuing from hot sulphur spring ; surface of mud barely 



covered with water ; no vegetation. Several specimens ; February, 1917. 



N. Annandale. (No. W. 111—1.) 

 Inle Lake, Southern Shan States. In black mud at edge of lake in about 1 foot 



of water ; much decaying vegetation present. Several specimens ; 28th 



February, 1917. N. Annandale. (No. W. 112—1.) 



Of the specimens collected at the various stations a number were 

 sexually mature ; and a preliminary examination showed in some a 

 feature not hitherto recorded, — a penis-like projection from the male 

 orifice. This was however not present in all the sexual animals ; one 

 showed a projecting penis on one side and not on the other ; a few showed 

 two, the majority no penis at all. Three specimens were sectioned, — 

 with none, one, and two penial projections respectively. 



In those cases where there is no projecting penis the various struc- 

 tures have much the arrangement described by Michaelsen (5). Michael- 

 sen divides the male deferent apparatus into the following parts : — 



{i) the funnel ; 



{ii) the vas deferens, which enters the wall of the next portion, 

 the atrium, near the apex of the latter, and runs in that wall, 

 in a direction away from the external aperture, to its very 



tip ; 



{Hi) the ental ^ portion of the atrium, a moderately wide tube 

 surrounded by a thick layer of modified peritoneal cells ; 



{iv) the middle portion of the atrium, a narrow continuation of 

 the above, which soon enters the coelomic sac, in the upper 

 part of which it winds about, accompanied by the paratrium ; 

 the lumina of the atrium and paratrium finally unite ; 



^ Different authors use the terms " jiroximal " and " distal" in different senses in 

 describing, for example, such a structure as the atrium, or a spermatheca. The more 

 usual practice amongst English writers seems to be to take the fixed end,— that which is 

 united with the bodywall, — as the proximal ; but Michaelsen calls the internal end 

 proximal and the outer distal. To obviate confusion I use the terms " ental " and 

 " ectal," 



