518 Mr. C. R. Narayana Rao on the Anatomy of 



larly disposed. The sperm-ducts are led off from the inner 

 margins of the vesicles and are short, spirally coiled tubes, 

 hidden by the lobate sacs themselves and the nephridia. 

 Each duct enters the spermiducal gland near its anterior 

 base. The prostate gland of each duct is long, whitish, 

 soft in texture, pear-shaped or nearly cylindrical, readily 

 comes to vievr on opening the Avorm, and is attached to the 

 body-wall at the posterior face of septa 9/10 and 10/11. 

 lu microscopic preparations, the gland is seen to be com- 

 posed of short club-shaped glands and circular muscle- 

 tibres with the cubical epithelial lining. The atrial papillne, 

 developed more prominently in connection with the anterior 

 male apertures, consist of an outer cuboid cell-layer and two 

 sets of muscle-fibres derived from the body-wall. They are 

 free from glandular bodies. 



There can be little doubt that this species of Drawlda is 

 the most archaic of the known species, in possessing a more 

 complete holoandric sexual apparatus than even D. somavar- 

 patana, and indeed these two species render the generic 

 character of the reproductive organ of the gi'oup, at least 

 in one of their aspects, less universally applicable. 



The ovaries are whitish-looking delicate bodies hanging 

 from the anterior face of septum 10/11 without being 

 contained in any sj)ecialized ovarian chamber. A greater 

 part of the ovary lies in the sac, which is slender, constricted 

 by septa 11/12 and 12/13, occupying nearly three somites, and 

 lying over the first two gizzards. An entire sac examined 

 under the low power of the microscope, even without much 

 clearing, shows oocytes in difi'erent stages of maturation. 

 I have not been able to make out an oviduct in any of the 

 six examples investigated, and the chamber of somite 11 

 perhaps acts as a provisional chamber for the reception and 

 extrusion of ova. 



The spermathecal apparatus of this species approaches the 

 condition met with in Megascolex. There is not any well- 

 marked ampnllu, possessing a structure comparable with 

 that of the other species described in this paper. The duct 

 has a slight dilatation which lies on the posterior face of 

 septum 7/8 between the heart and the secondary vascular 

 commissure, and is thus ventral in position to the dorsal 

 vessel and the oesophagus. The duct is thin and spiral! v 

 coiled ; it penetrates septum 7/8 and enters the base of the 

 atrial vesicle on its inner margin. The duct and its 

 dilatation do not differ structurally, and hence an ampulla in 

 tlie true sense of the term does not occur in this species, 

 which, so far as I know, is the solitary example of the genus 



