412 DESCRIPTION OF [Rotatoria. 



708. Anuraea squamula (Brachionus squamula, M.) 

 The Jish-scale Anuraea is smooth, obtusely square, with 

 six horns in front, obtuse behind. Figs. 495 to 497 re- 

 present different views of this animalcule, the two latter 

 have an egg attached. Length 1 -240th. 



709. A^ v RAE A falculat a. The sickle Anuraea is oblong, 

 has six teeth anteriorly, the two central ones curved 

 outwards, like sickles. The surface of the lorica is not 

 ridged, but rough, the posterior extremity obtuse. Length 

 l-144th. 



710. Anuraea curvicornis. The crooked-horned Anu- 

 raea is nearly square, with six frontal horns, the two 

 middle ones being larger, and curved outwards and down- 

 wards. The dorsal surface is tesselated; its large red 

 round eye is seated upon a large nervous ganglion ; the 

 CESophagal head has three-toothed jaws. This animalcule 

 also carries the eggs attached. Length 1-2 16th. 



711. Anuraea biremis. The two-ruddered Anuraea is 

 linear and elongated, with four horns anteriorly ; the back 

 very smooth, and having two lateral spines, Hke oars. The 

 cesophagal head has three-toothed jaws. Found in phos- 

 phorescent sea water. Length 1-1 44th. 



712. Anuraea striata (^Brachionus striata, M.) The 

 striated Anuraea is linear and elongated, with six horns in 

 front, the back having twelve longitudinal flutings or rays, 

 and being obtuse at the end. This species is very change- 

 able in form, owing to the membranous lorica yielding to 

 the contraction of the body, hence it is sometimes long, at 

 others short, sometimes urn-shaped, bell-shaped, and even 

 almost disc-shaped; the first, however, seems to be the nor- 

 mal form. Found in fresh and salt water. Length 1- 130th. 



