DESCRIPTIONS OF GENERA AND SPECIES 463 



backwards of the nephridium is rendered possible by the absence of the septa in this 

 region of the body, which do not commence until the fifth segment (v/vi) ; M. 

 algeriensis agrees with the present species in both these points. 



(5) Microscolex minutus, BEDDAED. 



Rhododrilus minutus, BEDDAED, P. Z. S., 1889, p. 381. 



Definition. Length, 3 in. Clilellum, XIV-XVII. Setae of ventral couples closer together 



than of outer anteriorly ; posteriorly both equidistant. Dorsal pores present after clitettum. 



Gizzard in segment V. Septa dividing segments VI/XII specially thickened. Spermathecae 



four pairs in, VI IX. Penial setae present. Sperm-ducts open independently of glands. 



Hal. New Zealand. 



This species is peculiar in possessing four pairs of spermathecae. In this it 

 approaches the more highly organized Cryptodrilids, particularly the genus Mega- 

 scolides. The diverticula are very nearly as large as are the spermathecae themselves ; 

 both are tubular in form. The spermiducal glands extend through seven segments. 



(6) Microscolex novae-zelandiae, BEDDAED. 



M. novae-zelandiae, BEDDAED, P. R. Phys. Soc., 1893, p. 33. 



Definition. Length, 42 mm. ; diameter, 1 mm. ; number of 'segments, 76. Clitettum, XIII- -XVII. 

 complete except in XVII, where are paired male pores. Setae paired, lint not very closely. 

 Nephridia commence in II. Gizzard very rudimentary in V ; intestine begins in XF1. 

 Septa separating* segments VIII/XIII slightly thicker than the rest. Penial setae without 

 ornamentation. Spermathecae in IX with two diverticula. Hab. Neio Zealand. 



This species has three papillae in neighbourhood of male pores, one in front and 

 two just behind apertures arranged so as to form a triangle. 



(7) Microscolex spatulifer (MICHAELSEN). 



Cryptodrilus (?) spatulifer, MICHAELSEN, JB. Hamb. wiss. Anst., vi, 1889, p. 10. 

 Cryptodrilus spatulifer, BEDDAED, P. R. Phys. Soc., 1893, p. 31. 



Definition. Length, 145 mm.; number of segments, 146. Prostomium complete. Setae 

 strictly paired. Clitellum, X1II-XVII. Gizzard in FI ; intestine begins in XVIII. 

 Gonads one pair only ; sperm-sacs in XI ; spermalhecae in IX, with large caecum ; 

 racemose at- distal end. Penial setae with crenate ridges. Hab. Chili. 



