232 MB. OLDFIELD THOMAS ON THE MAMMALS [Nov. 3, 



Fig. 15. The distal extremity of the penial tuhe. (Camera, X 700.) 



16. A spermatheca, as seen in an entire individual. 



17. A speimatheca, isolated and uncoiled. 



Figs. 18 to 22 refer to Litnnodrilus 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 oi Achceta maoj'ioa from an entire specimen, p. 231. 



24. A spermatheca of Achata maorica as seen in an entire specimen, p. 221. 



25. A transverse section of the spermathecal duct of 'Enchytrceus simulans, 



showing 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. 



JEnchytrceus 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. XXV. fig. 25.) 



28. A male duct ; isolated. 



Figs. 29-31 refer to Diporochceia aquatica, p. 226. 



29. A transverse section of the intestine ( X 80), showing the small typhlosole 



ity.) ; the dorsal vessel is surroxmded by a structure (.r). 



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 Flutellus Taeustris, p. 228. 



32. Outline of a transverse section of the body showing the spacing of the 



cha3ta3. (From a Camera drawing, X 40.) 



33. A locomotor cbaeta. (Camera, X 120.) 



34. The tip of a locomotor chseta. (Camera, X 700.) 



35. A copulatory chseta. ( X 120.) 



36. The tip of a copulatory chaeta. (X 700.) 



37. A spennatheca. 



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 these two segments, 



2, On the Mammals collected by Mr, A, Robert at Chapada*, 

 Matto Grosso (Percy Sladen Expedition to Central 

 Brazil). By Oldfield Thomas, F.R.S. 



[Received .July 23, 1903.] 



(Plate XXVII, t) 



By the generosity of Mrs, Percy Sladen, Mr. Alphonse Robert, 

 who had already done svxch 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; Cuyabd. and other names of Guarani derivation on Ihe final a. 

 t Fov explanation of the Plate, sec p. 24i, 



