676 DESCRIPTION OF [^RotatoHa. 



after they arc expelled. They swim freely, though not very 

 quickly. 



This genus has the name of Anourella, given it by Bory St. 

 Yincent, retained by Dujardin. 



(rt.) — Species posteriorly devoid of spines and pedicle. 



Anueaea (?) quadridentata. — Lorica oblong, with four horns 

 anteriorly, its posterior end obtuse, back tesselated. Length 1-2 16th, 

 without the horns. 



A. squamida {Brachionus squamula, M.) — Smooth, obtusely square, 

 with six hoi'ns in front, obtuse behind. Figs. 495 to 497 represent 

 different views of this animalcule, the two latter with an egg 

 attached. Length 1 -240th. 



A. falcata. — Oblong, has six spines anteriorly, the two central 

 ones ciu'ved outwards, like sickles. Surface of the lorica not ridged, 

 but rough, posterior extremity obtuse. Length 1-1 44th. 



A. curvicornis. — Nearly square, with six frontal homs, the two 

 middle ones larger, and curved outwards and downwards. Dorsal 

 surface tesselated ; its large red round eye is seated upon a large 

 nervous ganglion ; the oesophageal head has three-toothed jaws. 

 This animalcule also carries the eggs attached. Length 1-21 6th. 



A. hireniis. — Linear and elongated, with four horns anteriorly ; 

 back very smooth, and having two lateral spines, like oars. The 

 oesophageal head has three-toothed jaws. Foimd in phosphorescent 

 sea water. Length 1-1 44th . 



A. striata {Brachiomis striata, M.) — Linear and elongated, with 

 six horns in front, the back with twelve longitudinal flutings or rays, 

 and obtuse at the end. This species is very changeable in foi-m, 

 OM'ing 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 normal form. Found in fresh and salt water. Length 

 l-130th. 



{b.) — Spinous, or attenuated in pedide-Ulce manner posteriorly 



A. inermis. — Lorica oblong, attenuated and truncated posteriorly; 

 no spines anteriorly ; back liirnishcd with faint longitudinal rays. 

 Found in peat water. Length when extended, I -144th. 



A. acuminata. — Lorica oblong, attenuated and truncated at the 



