STRUCTURE OF A GENUS OF OLIGOCH^ETA. 13 



t5. The hearts are in segments VI-XIV, and are of large size. 



t6. The alimentary tract begins with a buccal cavity, which occupies the first three 

 segments ; the pharynx is apparently restricted to a single segment, the IVth ; the 

 oesophagus lying in segment V is very narrow, afterwards it widens and extends through 

 seven segments ; the gizzards (three in number) occupy segments XIV-XVI ; in an other 

 specimen, probably not M. Barwelli, they are further back. There are no calciferous 

 glands (?). 



t7. The n&phridia commences in segment V; each has a saccular diverticulum; the 

 funnel opens in the segment in front close to nerve cord. 



t8. Th etestes are either (M. Barwelli) in segment IX, attached to the posterior wall 

 of this segment, or else in segment X, attached to the front wall. 



9. The sperm sq,cs (one pair) are in segment IX or X, in correspondence with the 

 position of the testes ; their cavity is undivided. 



tlO. The vas deferens funnels, in accordance with the varying position of the testis 

 open into the IXth or Xth segment. 



11. The atrium open between segments X/XI ; it has precisely the structure of the 

 atrium of Rhynchelmis. 



tl2. There are no genital or penial setae (?). 



tl3. The oviducts are in segment XI ; in the individual which probably belongs to a 

 species distinct from M. Barwelli, the oviducal funnel is spread along the anterior face 

 of the septum separating segments XI/XII. 



14. The spermathecce are a single pair situated in segment VIII ; each consists of a 

 small oval pouch, with a very long contorted duct. 



LIST OF MEMOIRS CONSULTED. 



1. Beddard, F. E. Notes on some Earthworms from Ceylon and the Philippine Islands, Ann. and 



Mag. Nat. Hist, February 1886. 



2. Beddard, F. E. Note on the Reproductive Organs of Moniligaster, Zool. Anz., 1887. 



3. Beddard, F. E. Preliminary Notes on some Oligochaeta, Zool. Anz., 1889, No. 318. 



4. Beddard, F. E. On the Structure of three New Species of Earthworms, &c, Quart. Jour. Micr. 



Sci., vol. xxix. 



5. Beddard, F. E. On the Anatomy and Histology of Pleurochaita Moseleyi, Trans. Roy. Soc. 



Edin., vol. xxx. 



6. Bourne, A. G. On Indian Earthworms. Part I. — Preliminary Notice of Earthworms from the 



Nilgiris and Shevaroys, Proc. Zool. Soc, 1886. 



7. Bergh, R. S. Untersuchungen liber den Bau und die Entwicklung der Geschlechtsorgane der 



Regenwiirmer, Zeitschr. wiss. Zool., Bd. xliv. (1886), p. 303. 



8. Horst, R. Descriptions of Earthworms : I. Moniligaster Houtenii, n. sp., a gigantic Earth- 



worm from Sumatra, Notes Leyden Mus., vol. ix. p. 97. 

 VOL. XXXVI. PART I. (NO. 1). C 



