1896. } FROM THE SANDWICH ISLANDS, 209 
of the ventral couple. The spermathecal 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., 
xi. 
The spermathece 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 cailed. 
There were two fully developed penial sete in the bundle 
which I extracted for examination, and four immature ones. The 
fully mature sete 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 sete. 
Hab. Macquarie I., S. of New Zealand’. 
Remarks.—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 Acanthodrilus (s.s.) which present the following combination 
of characters :—Sete distant, gizzard rudimentary, clitellum short 
(xiii.xvi.), nephridia not alternating, spermathecee with two 
diverticula. Acanthodril with these characters are restricted in 
range to Patagonia, S. Georgia, and the Falkland Islands. The 
Patagonian group thus characterized contains four species, viz., 
A. bovei, Rosa, A. georgianus, Mich., A. falclandicus, F. E. B., and 
A. aquarum dulcium, ¥. E. B., which furthermore agree in being 
all of small size. The only difference which distinguishes 
A. macquariensis from these is the form of the penial set and the 
position of the genital papille. 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 INDICA, 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 sete of the ventral couple are fairly closely approximated to 
each other, those of the dorsal couple are distant. The space 
? T am indebted to Prof. 1. J. Parker, F.R.S., for the specimens. 
Proc. Zoon. Soc.—1896, No. XIV. 14 
