DESCRIPTIONS OF GENERA AND SPECIES 463 



back-wards 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. 

 algeriends agrees with the present species in both these points. 



(5) Microscolex minutus, Beddaed. 



Bhododrilus minutus, Bedbakd, P. Z. S., 1889, p. 381. 



Definition. Length, 3 in. Clitellum, XIF-XFII. Setae of ventral cou;ples closer together 



than of outer anteriorly ; posteriorly hoth equidistant. Dorsal pores present after clitellum. 



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. 



Hab. — 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, Beddabd. 



M. novae-zelandiae, Beddaed, P. E,. Phys. Soc, 1893, p. 33. 



Befinition. Length, 4,2 mm. ; diameter, % mm. ; number of segments,'] 6. Clitellum, XIII— XVII. 

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

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

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

 ornamentation. Spermathecae in IX with two diverticula. Hah. — New 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, Beddabd, P. E. Phys. Soc, 1893, p. 31. 



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

 strictly paired. Clitellum, XIII-XVII. Gizzard in VI; intestine begins in XVIII. 

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

 racemose at distal end. Penial setae with crenate ridges. Hob. — Chili. 



