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Show 640 MR. F. E. BEDDARD ON THE [May 22, heart is in segment xii. This assemblage of characters does not correspond exactly with any of the forms described by myself; nor does it fit in with any of the varieties described by Michaelsen. In two individuals examined by myself and belonging to another series, I find the following characters:-The papilla? three pairs on xix.-xxi.; the last heart is in xii.; the sperm-sacs in x.-xiii.; the spermathecae are more numerous, in one specimen 7 and 6 in vi., 8 and 9 in vii.; in the other 11 and 12 in vi. and 14 in vii. A third individual came nearer to the first described variety in that it had not more than three spermathecae on each side of each of the segments vi., vii. (the actual numbers were 1-2, 3-3). There are no papillae; the last heart is in xii., the sperm-sacs in xi.-xiii. This form seems to come nearest to Michaelsen's variety klaba-tensis, in which the last heart is also in xii., the spermathecae 8-11 pairs, but which has no papillae. Another individual agreeing with the last in having three papilla? (those of one side of body were missing) has also sperm-sacs in x.-xiii., 5 to 10 spermathecae on each side of the body in their respective segment, but has the last heart in xiii. Three specimens had five pairs of papillae, sperm-sacs in x.-xii. or xiii., last heart in xiii., spermatheca? varying from four to twelve on each side of their respective segment. In one of these there were seta? on the last segment of the clitellum, a feature which is not present in other specimens that have been examined. This group seems to agree with the variety seriata of Michaelsen, but differs in some small points. I confess that there seems to m e to be no way out of merging all these specimens with those I have described previously and with those of Michaelsen and Horst into one species, Amyntas stelleri. But the variation iu such features as the position of the last heart, which is usually so well marked a character, is very curious. This species it is quite clear comes near to the next. It is, however, as far as our present information goes, to be distinguished by the absence of specially enlarged ventral setae. In other respects, however, it is very near, and it may be necessary ultimately to merge to two. M. Spermathecae numerous in vi. 76. Amyntas phacellotheca Mich. A. phakellotheca, Michaelsen, Jahrb. Hamb. wiss. Anst. xvi. p. 47. 130 mm., 115 segments. Seta? with dorsal gaps, those of anterior segments larger, 25 on v., 75 on xxvi. Male pores closely approximated. No caeca. Last heart in xii. Sperm-sacs in xi.- xiii. Spermiducal gland with S-shaped duct. Spermathecae, three pairs asymmetrical. Hab. Celebes. Only a single example known. |