soyne new Species o/Drawida. 531 



is flat. From below, a stout bent tube, the second vas 

 deferens, is given otf and is inserted into the upper end of 

 the posterior division of the sessile prostates. In the 

 sectional preparations tlie histological elements composing 

 the sessile prostates are also met with in those of the spermi- 

 ducal gland surrounding the tubular vesicle, in which the 

 arrangement of the second testis is same as what has been 

 described in the similar organs of D. somavarpatana. The 

 coiled vas deferens of the spherical vesicles entei's the tubular 

 vesicle, and below this point the cells of the lining membrane 

 of the latter lose all the character of spermatocytes and 

 rather resemble those of spermiduct itself. Near the ental 

 end of the second tubular sacs the sperm parent-cells are 

 found in various stages of division. 



The arrangement of the male reproductive apparatus of 

 t'is species is very like that o? D. somavarpatana, but only 

 with such differences as have been indicated above. Strong 

 broad bands of muscles connect the second pair of vesicles 

 to the body-wall on both sides, such as have not been 

 ol)served in any other species. This mode of attaching 

 accounts for the difficulty of erecting the sacs for the 

 purpose of examination. 



Tlie egg-sacs, which lie over the first gizzard, are shifted 

 backwards by the length of two somites. They are slender 

 tubular structures, mainly composed of yolk-])latelets ; the 

 ovaries, which are tufted organs, are attached to the stem of 

 the sacs. Septa 10/11 and 11/12 are juxtaposed, but do not 

 fuse, and the coelomic chamber of segment 11 is nearly a 

 shut cavity in which a coiled glandular oviduct lies, whose 

 funnel is indistiuguishably situated in the ovarian mass. 



The ampulla of the spermathecal apparatus is small, 

 oval, being situated on either side of the dorsal vessel in 

 somite 8, only loosely attached to the posterior face of 

 septum 7/8. The duct is thin and is only moderately coiled. 

 It runs outwards, penetrates the septum 7/8 considerably 

 over the ventral body-wall ; the greater part of its further 

 course lies in the thickness of this septum, which it leaves 

 at the base for insertion dorsally into the anterior lobe of 

 the copulatory pouch. The pouch is double-lobed, with a 

 median constriction dividing the organ into unequal anterior 

 and posterior parts (PI. XV. fig. 2 E). The whole ix)uch lies 

 in segment 7, and pushes backwards considerably over half 

 a somite the septum 7/8. The cavity of the pouches is 

 divided into a number of incomplete horizontal compartments 

 with ridges, which, though running round the inner wall of 

 the lobes, are discontinuous. In sectional preparations the 



