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Show 202 MR. F. E. BEDDARD ON EARTHWORMS [Jan. 14, There are nine setae on the xvith segment of the body, 4 on one side and 5 l on the other side of the median ventral line. On the third, fourth, and fifth setigerous segments the setae are very stout, particularly on either side of the median ventral line. Those of the first two segments are delicate, as are those which follow the fifth. Fourteen setae lie between the male pores. The clitellum (xiv.-xvi.), as has been already remarked, has setae upon its last segment. The dorsal pores commence x./xi. The male pores lie in the line of seta); close to each, but below the line of setae, are two or three papillae in a straight line with their fellows on each side of the body, but obliquely as regards its transverse axis. The first septum divides segments v. and vi.; this and the next two are thickened; so are the first four following the gizzard, the last of which divides segments xiii./xiv. The intestine begins in xv. ; the caeca, which lie in segment xxvi., are short. The last heart is in segment xiii. The sperm-sacs lie in xi. and xii.; in x. and xi. are the sperm-reservoirs, containing funnels of sperm-ducts. The spermiducal gland occupies segments xvii.-xxi. ; it is flattened and lobulated; the duct is long and curved, narrowing towards the external orifice, which is not provided with a terminal sac. The ovaries occupy the usual position. There are a pair of elongated egg-sacs in both xiii. and xiv. The spermathecae are in vi., vii., viii. The oval pouch communicates with the exterior by a long duct longer than itself. The diverticulum, ending in an oval dilatation, has a corkscrew-like duct. This diverticulum, when straightened, is not far short of the pouch in length. Hab. Waimea, Molokai, and Mauna Loa, Hawaii. Remarks.-I have given a description of this species because the individuals examined by myself depart slightly and in a few particulars from the description given of Perichaeta hawayana by Dr. Bosa. The most noteworthy difference is apparently the existence of setae upon the last segment of the clitellum. Dr. Bosa does not assert their absence, but would, I am disposed to think, have mentioned their presence were they existent. On the other hand, his description of the intestinal caeca-" eine gefiederte, durch zwei Lappenreihen vermittelte Gestalt erkennen lassen " - agrees entirely with my observations. Differences also in the number of the setae in certain segments, and in the number of the thickened intersegmental septa, will appear on a comparison of Dr. Bosa's account with mine. I have marked this species as one of those indigenous to Hawaii. 1 14 or 15 altogether in another specimen, and more still apparently in others. |
