South American Rotifer a. By J. Murray. 453 



Variety (fig. 46a). — Large, lorioa 160 fx, tails 70 fju, anterior 

 spines 6, outer and median conspicuous. 



Variety (fig. 46?)). — Very small, no tails, anterior spines 4, 

 minute. 



Variety (fig. 46c). — Very small, lorica 80 ^jl, tails 30 ^, anterior 

 spines 6, minute. 



Variety (fig, 46fZ). — Very large, lorica 180 fju, tails 100 fju, anterior 

 spines 2 only, the large pair near the median line ; surface distinctly 

 papillose (the dots are shown on a small part of the surface), ventral 

 margin scalloped (fig. 46e). 



Variety (fig. 46/). — A medium-sized form, without tails. 



BracJuonus hakeri Mull. (63). Plate XVIII, figs. 49a, 49&. 



Variety. — Small, quadrate, with short divergent posterior 

 spines. Ventral anterior margin (fig. 495), peculiar, scalloped and 

 bearing near the middle several small spicules. 



Anursea aculeata Ehr. (58). Plate XVIII, fig. 50. 



Variety. — Total length 220 yLt; greatest breadth 75yLt; posterior 

 spines unequal, 40 //, and 75 yit, always converging. 



The variety resembles A. valga, but the spines normally con- 



verc^e. 



o 



In the salt lagoon, Kio. 



Anuriea coclilearis Gosse {59). 



Variety (not figured). — Posterior spine very long, equal to the 

 length of the lorica, or longer. 

 In the salt lagoon, Kio. 



Noteus quadricomis Ehr. (-58). 



The species varies greatly in the relative sizes of the toes and 

 spines. In the pond in the Prapa Eepublica, Eio, specimens 

 occurred having the following measurements : — 



Large example — total length of lorica, counting the spines, 

 240 /JL, posterior spine 40 //,, toe 35 fi. 



Smaller example — total length 150 /jl, posterior spine 30 yLt, toe 

 40-45 fi. 



