1896.] TROM IHE SANDWICH ISLANDS, 209, 



of the ventral couple. The sperinathecal pores have a position 

 corresponding to that of the glands. As to internal anatomy, 

 I could find no well-developed gizzard ; this, if present, is certainly 

 rudimentary. The intestine appears to begin in the xvith segment. 



The last heart is in segment xii. 



The sperm-sacs, very racemose in character, are in segments xi., 

 xii. 



The spermatheece are in segments viii., ix. Each is an oval pouch 

 with two diverticula of the same form, but smaller, one on each side., 



The spermiducal glands are not very long and but slightly coijed.i 



TJiere were two fully developed iienial setce in the bundle 

 which I extracted for examination, and four immature ones. Th(} 

 fully mature setae are ornamented upon the distal one-fourth by 

 sparsely scattered triangular, often rather blunt and not very large 

 tubercles. These were also apparent upon all the immature setae. 



Hab. Macquarie I., 8. of New Zealand '. 



Bemarhs. — It will be obvious from the above description that 

 the present species cannot be possibly confounded with any New 

 Zealand species, with which it would be natural to compare it in 

 the first place. There are in New Zealand no members of the 

 genus Acanthodi-ilus (a.s.) which present the following combination 

 of characters : — Setae distant, gizzard rudimentary, clitellum short 

 (xiii.-svi.), nephridia not alternating, spermathecse with two 

 diverticula. AmiitJwdrili with these characters are restricted in 

 range to Patagonia, 8. Georgia, and the Falkland Islands. The 

 Patagonian group thus characterized contains four species, viz., 

 A. lovei, ErOsa, A. georgiarms, Mich., A. falclandims, F. E. B., and 

 A. aquarum duldum, ¥. E. B., which furthermore agree in being 

 all of small size. The only difference which distinguishes 

 A. maequariensis from these is the form of the penial setae and the 

 position of the genital papillae. It is a most interesting fact, and 

 one which has an obvious bearing upon the theory of a former 

 northward extension of the Antarctic continent, that from 

 Macquarie Isl., 600 or 700 miles south of New Zealand, and there- 

 fore so much nearer the existing southern continent, a decidedly 

 Patagonian and South Georgian form of Acanthodrilus should have 

 been met with. 



Benhamia indioa, n. sp. (Fig. 3, p. 210.) 



I have received from Mr. Wroughton, through the kind 

 suggestion of Mr. E. H. Aitken, a number of worms which may 

 belong to a new genus. They are stoutish worms, the largest 

 reaching a length of three or four inches. 



The prostomium is large, but does not encroach upon the buccal 

 segment. 



The setce of the ventral couple are fairly closely approximated to 

 each other, those of the dorsal couple are distant. The space 



■' ' I am-indebted to Prof. T. J. Parker, F.R.S., for the specimens. ' 



Pboo. Zooh. Soo.— 1896, No. XIV. 14 



