230 W. B. BENHAM. 



Some species have been described as possessing large 

 nephridia without a network of small tubules (see above).] 

 Species 1. A. obtusus, E. P., 1872; New Caledonia. 



2. A. ungulatus^ E. P., 1873; New Caledonia. 



3. A. verticillatus, E. P., 1872; Madagascar. 



4. A. kerguelenensis,E. R. L., 1879; Kerguelen. 



5. A. capensis, F. E. B.^ 1884; Cape of Good 



Hope. 



6. A. buttikoferij Horst, 1884; Liberia. 



7. A. schlegelii, Horst, 1884; Liberia. 



8. A. layardi, F. E. B., 1886; New Caledonia. 



(Horst believes this species to be identical with 

 A. ungulatus.) 



9. A. novse-zelandi^e, F. E. B., 1885;. New 



Zealand. 



10. A. multiporus, F. E. B., 1885 ; New Zealand. 



11. A. dissimilis, F. E. B., 1885; New Zealand. 



12. A. neglectus, F. E. B., 1887; New Zealand 



(?= dissimilis). 



13. A. annectens, F. E. B., 1888; New Zealand. 



14. A. beddardi, Horst, 1888; Liberia. 



15. A. australisj Michaelsen, 1889; Australia. 



16. A. georgianus, Michaelsen, 1889; South 



Georgia. 



17. A. littoralis, Kinberg, 1866; Magellan. 



18. A. scioanus, Rosa, 1888; Africa. 



19. A. bovei, Rosa, 1889; Magellan. 



20. A. antarcticus, F. E. B., 1889; New Zealand. 



21. A. rosEC, F. E. B., 1889; New Zealand. 



22. A. dalei, F. E. B., 1890; Falkland Isles. 



For descriptions of this genus and its species see Perrier, 

 ' Nouv. Arch, du Mus. d'Hist. Nat. de Paris/ viii, 1872 ; Bed- 

 dard, ^Proc. Zool. Soc.,' 1885—1887; ^ Quart. Journ. Micr. 

 Sci.,' xxviii, xxix, and xxx; Horst, ^ Notes from Leyden 

 Museum,' ix, x ; Michaelsen, ' Jahrb. d. hamburgischen wiss. 

 Anstalten,' vi, 1889; Rosa, 'Ann. d. Mus. Civico d. Stor. 

 Nat. di Genova,' ser. 2, vi, 1888, and vii, 1889. 



