AN ATTEMPT TO CLASSIFY EAETHWORMS. 239 



Species 1. M. deshayesii, E. P., 1872 j Ceylon. 



2. M. barwelli, F. E. B., 1886; Manila. 



3. M. houteni, Horst, 1887; Sumatra. 



4. M. grandis, A. G. B., 1886; India. 



5. M. uniquus, A. G. B., 1886 ; India. 



6. M. sapphirinaoides, A. G. B., 1886; India. 



7. M. robustus, A. G. B., 1886 ; India. 



8. M. papillatus, A. G. B., 1886 ; India. 



9. M. rubens, A. G. B., 1886 ; India. 

 10. M. minutus, A. G. B., 1886; India. 



See Perrier, 'Nouv. Arch, du Mus. d'Hist. Nat. de Paris/ viii, 

 1872; Beddard, 'Ann. Mag. Nat. Hist.,' 1886; 'Zool. Anzieger/ 

 1887, No. 268, and 1889; ' Quart. Journ. Micr. Sci.,' vol. xxix, 

 1888 ; Horst, ' Notes from Leyden Mus.,' ix ; Bourne, ' Proc. 

 Zool. Soc.,' 1886. 



Remarks on Moniligastridse. 



The three authors who have studied the internal anatomy of 

 the genus Moniligaster differ from one another in their 

 statements as to the position of the male pores and other 

 organs. 



Perrier, in his description of M. deshayesii, describes, as 

 is well known, two pairs of male organs ; the ducts of the first 

 pair opening between Somites vii and viii, those of the second 

 pair between Somites x and xi. In connection with each of 

 the first pair of ducts is a double gland (his " prostate ") ; and 

 similarly there is a gland in connection with the other pair of 

 ducts, which is fairly elongated (his " seminal vesicle "). 



Beddard's original description in 1886, as well as his more 

 recent figures, shows considerable differences from this arrange- 

 ment, apart from the question of numbering. He identifies 

 Perrier's first pair of '^ testes" as spermathecse ; the " prostates " 

 (which are not represented in M. barwelli) he suggests may 

 be accessory sacs, which are so frequently found in connection 

 with spermathecae, whereas Horst identifies these "prostates" 

 of Perrier as the true spermathecae. 



Horst's figures are much more like those of Perrier than 



