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Show MR. OLDFIELD T H O M A S ON T H E M A M M A L S [Nov. 3, Fig. 15. The distal extremity of the penial tube. (Camera, X 700.) 16. A spermatheca, as seen in an entire individual. 17. A spermatheca, isolated and uncoiled. Figs. 18 to 22 refer to Limnodrilus lucasi, p. 216. 18. Entire penial tube. (X 120.) Note the distinct bend near the distal extremity. 19. The distal extremity of a penial tube. (X 700.) 20. Another view of the same. (X 700.) 21. A spermatheca. 22. A spermatophore, as seen within a spermatheca. 23. The sperm-duct of Achceta maorica from an entire specimen, p. 221. 24. A spermatheca of Aclieeta maorica as seen in an entire specimen, p. 221. 25. A transverse section of the spermathecal duct of E/ichytrceus simulans, shewing the coating of glandular cells outside the muscular wall; their necks passing through this, and uniting to form a protoplasmic lining (a) round the lumen, p. 219. PLATE XXVI. Enchytrams simulans, p. 219. Fig. 26. A nephridium-isolated from a bisected specimen. 27. A spermatheca-isolated ; the entire duct is covered with gland-cells (Cf. PI. X X V . fig. 25.) 28. A male duct; isolated. Eigs. 29-31 refer to Diporochreta aquatica, p. 226. 29. A transverse section of the intestine (X 80), showing the small typhlosole (ty.); the dorsal vessel is surrounded by a structure (.?). 30. The typhlosole much more highly magnified. (Camera, X 700.) 31, Part of the lateral wall of the intestine (Camera, X 700), showing the two kinds of cell forming the epithelium ; the base of the gland-cells dip into the blood-sinus. Figs. 32-40 refer to Plutellus lacustris, p. 228. 32. Outline of a transverse section of the body showing the spacing of the ch&'ta?. (From a Camera drawing, X 40.) 33. A locomotor ebseta. (Camera, X 120.) 34. The tip of a locomotor chajta. (Camera, X 700.) 35. A copulatory chseta. (X 120.) 36. The tip of a copulatory chaeta. (X 700.) 37. A spermatheca. 38. A spermiducal gland. 39. A somewhat diagrammatic sketch of a transverse section through the gut in segment xii., showing the lateral heart. 40. A similar section through segment x. or xi., showing the peculiar condition of the " heart" in thesp two segments. 2. On the Mammals collected by Mr, A. Robert at Chapada*, Matto Grosso (Percy Sladen Expedition to Central Brazil). By O L D F I E L D T H O M A S , F.R.S. [Received July 23, 1903.] (Plate XXVII, t) By the generosity of Mrs. Percy Sladen, Mr. Alphonse Robert, who had already done such good work in Sao Paulo and Parana, was enabled to make, during the latter half of 1902, a collecting expedition for the benefit of the National Museum to Matto Grosso, Central Brazil, a region in respect to which the Museum * Chapada being a word of Portuguese origin (signifying a plateau) has its accent on the second a ; Cuyaha and other names of Guarani derivation on the final a. f For explanation of the Plate, see p. 244, |