DESCRIPTIONS OF GENERA AND SPECIES 547 



strictly paired. Gizzard well developed. Tenles in X ; sperm-: acx in XI; spermathecae 

 with a long diverticulum. Spermiducal glands occupying segments XVI-XX. Penial setae 

 armed with spines. Hab. Picton Island ; Juan Island, S. America. 



This species, closely allied to A. dalei, has the same plan of colouration as has that 

 species. 



(30) Acanthodrilus purpureus (NEW SPECIES). 



Definition. Length, 95 mm. ; diameter, 5 mm. > number of segments, 98. Clitellum, 

 XIII-XVI, complete. Prostomium does not extend over buccal segment. Setae strictly 

 paired. Gizzard in VII. Last heart in XII. Spermathecae with tubular diverticulum 

 dilated at end. Spermiducal glands extend' through several segments. Penial setae with 

 spinelets. Hab. Magellan's Straits. 

 This species is of the frequent dark-violet colour. 



(31) Acanthodrilus chilensis (NEW SPECIFS). 



Definition. length, 80 mm. ; diameter, 5 mm.; number of segments, 150. Clitellum, 

 XIII-XVII. Prostomium complete. Setae strictly paired anteriorly, wider apart 

 posteriorly, but the divergence is not so marked as in A. platyurus. Gizzard in VI, VII. 

 Septa VIIIfX.II, stout. Last heart in XII. Textes in X; sperm-sacs in XI. Spermathecae 

 with short diverticulum. Spermiducal glands not long. Penial setae of a brown colour 

 in form like those of A. platyurus. Ilab. Teja Inland, Valdivia. 

 The colour (in alcohol) is dark purplish. 



(32) Acanthodrilus cingulatus (NEW SPECIES). 



Definition. Length, 58 mm.; diameter, 4 mm.; number of segments, 106. Clitellum, 

 XIV-XVIII. Prostominm complete. Setae strictly paired. Gizzard in VI, VII. Testes 

 in X; spermathecae with small diverticulum. Spermiducal glands much coiled, anterior 

 pair larger. Penial setae as in A. platyurus. Hab. Teja Is'and, Valdivia. 

 The colour in alcohol is rather brown than violet. 



(33) Acanthodrilus putablensis (NEW SPECIES). 



Definition. Length, 82 mm.; diameter, 8 mm. ; number of segments, 150. Clitellum, 

 XIV-XJ'I. Prostomium complete. Setae strictly paired anteriorly, divergent posteriorly, 

 and more so than in A. platyurus. Gizzard in VI. Septa J'lII/XIV, stout. Last 

 hearts in XIII. Testes in X; sperm-sacs in IX, XIII. Spermathecae with two short 



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