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M. Kowalewski: Aulodrilus 



Plate 39. 



Aulodrilus pluriseta Piguet (1906) 1913. 



41. — Mad-tubes in which the animais live. 



42. — A mud-tube with living animal, characteristically contorted. 

 48. — Two successive phases of the movement of the animal. 

 44 — 45. — Maie reproductive organs, side- and ventral view, X 195- 



46. — Testes and ovaries in an early stage of development, X 9^- 



47. — Spermatheca, X195. 



48. — Vascular plexus in segm. V — VI. 



49. — Setae, X 764. 



50. — Cross-section of segm. VII, X 195. 



51. — A part of a cross-section of segm. VII, X 195. 



52. — Topographical position of the atria, X 94. 



53. — Ventral view of segm. VII of a mature spécimen, X 9-i. 



54. — Topographical position of the external spermathecal pore, X 94- 



55. — Respiratory organ, side-view, X 94. 



56. — A part of the wall of the respiratory organ; latéral longitudinal 

 X388. 



