South American Botifera. By J. Murray. 355 



two claws, but it is figured with distinct frontal spines. 1 have 

 seen American specimens supposed to be M. rohusta, identified by 

 Mr. Harring. If the identification be right, the specimens lack the 

 frontal spines, and have parallel-sided toes. 



Hahitat. — Eiver Amazon ; collected by Lieut. A. E. Harbord, 

 1911. 



Monostyla hicornis Sten. {52). Plate XA", figs. Zoa, 356. 



Description. — Small, lorica somewhat oblong ; dorsal plate 

 narrower, bent in towards the middle line in front, so that there is 

 scarcely any anterior dorsal margin, narrowed and truncate behind ; 

 posterior lobe small, rounded. Anterior ventral margin bearing two 

 small incurved spines. Lateral and posterior sulci deep. Toe 

 broad at base, much tapering, with pointed shoulders and claw. 



Length of contracted lorica 100 fju, of dorsal plate 95 fi, of toe 

 45 fi ; breadth of ventral plate 75 /a, of dorsal plate 70 fx, of anterior 

 margin 50 /^. 



A remarkable animal, and the orientation of the anterior parts 

 difficult to make out. The incurving of the anterior part of the 

 margin of the dorsal plate is very unusual. They almost (if not 

 quite) meet in the middle line. In consequence of this the anterior 

 margin belongs chiefly to the connecting membrane. The obtuse 

 angles terminating this line must be considered as the anterior- 

 ventral angles. The spines on the ventral margin are unique. 



The rapidly tapering toe is characteristic, and is shared by only 

 one species, M. galeata Bryce (->:>). The resemblance of the two 

 species is very close, and the only difference of which I am aware 

 is the anterior spines of M. hicornis. Stenroos's figure is good, 

 chough leaving the relation of parts rather obscure. 



Hahitat. — Botanic Gardens. Eio. 



Monostyla punctata sp. n. Plate XV, figs. 36a-36f7. 



Specific Characters. — Small, roundish, lorica covered by minute 

 hyaline dots, giving a fine reticulated appearance. Dorsal plate 

 considerably broader, nearly circular, truncate behind, and with a. 

 characteristic excavation in front. Dorsal anterior margin elevated 

 above ventral, except near outer angles ; ventral anterior margin 

 shallowly excavate. Two prominent ridges diverge backward from 

 projecting points on anterior margin. Toe short, broad, bluntly 

 shouldered, and clawed. 



Description. — Length of contracted lorica 90 fi, of dorsal plate 

 85 /x, width 75 /x, of anterior margin 60 yit, length of toe 30 yu,. The 

 edge of the dorsal plate is rounded on to the anterior margin, and 

 ends there in two low triangular prominences, between which is a 

 shallow depression. These prominences really mark the junction 



