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Show 1900.] EARTHWORMS OF THE " SKEAT EXPEDITION." 895 muscular duct. The diverticulum is short, barely one-third of the length of the sac. Hab. Aring. The following is the abstracted definition of Amyntas malayanus, n. sp. Length 144 m m . ; number of segments 105. Setae of anterior segments not enlarged. Clitellum xiv.-xvi., with setae. Genital papillae paired on xviii.-xxi. Male pores far apart. Septum viii./ix. present. Caeca present. Last hearts in xiii. Sperm-sacs in xi., xii. Spermiducal glauds in xvii.-xix., with horseshoe-sbaped duct and no terminal sac. Spermathecae in vi.-ix., with shortish diverticulum. Hab. Malay Peninsula. (6) Amyntas virgo, n. sp. I have examined seven and dissected four fully mature examples of this species, whose characters do not fit in with those of any other species that has been adequately described. The largest individual, which, however, like the others, is somewhat softened in the clitellar region, measures 152 m m. The setce upon the anterior segments are rather larger than upon the following segments. The clitellum, which occupies the usual segments, has no setae. The male pores are very conspicuous and quite far apart. There are no genital papillae. The gizzard-septum is wanting ; two septa following the gizzard are of considerable thickness. The usual paired caeca are present. The last heart is in segment xiii. The remarkable feature about this species which at once differentiates it from A. impudens1 and A. philippinus2-the only two that could be confused with it by reason of their possessing a terminal sac to the spermiducal-gland duct, no setae upon the clitellum, and 3 pairs of spermathecae in vii.-ix.-is the very small size of all the parts of the generative apparatus. In this the present species resembles A. taprobance. The sperm-sacs are small and lie in segments xi., xii.; they do not reach as far as to the dorsal surface of the intestine. The spermiducal glands vary in size, but are small and confined to their segment. The short duct leads into the circular eud-sac. The spermatheca' are so small that they might be readily overlooked ; and yet the external apertures are quite large and conspicuous. Each pouch has a diverticulum of about the same shape and size, especially resembling in this A. taprobance. The spermathecae lie in segments vii., viii., ix., and open between vi./vii., &c. Hab. Paddy-fields, Tale. 1 Michaelsen, JB. Hamb. wiss. Anst. xvi. p. 84. 2 Rosa, Ann. Hofru. Wien, vi. p. 397. |