Brachionaeu.] THE INFUSORIA. 411 



under pressure. Found amongst decayed sedge-leaves and 

 oscillatoria. Length 1-1 20th to l-72nd. 



Genus CLXXXVI. ANUBAEA includes Brachionaea 

 which have a single cervical eye, but no foot (Brachioni with- 

 out feet.) In seven species the lorica has facetta upon the 

 back, in four longitudinal striae : in three it is smooth, in 

 thirteen species it is spinous anteriorly, and in seven pos- 

 teriorly also. A. biremis has a moveable spine on each 

 side : one species is found as an empty shell only ; in the 

 rest the rotatory organs, with their cilii, as also often their 

 muscles, are seen, but no longitudinal ones have been ob- 

 served in any of the species. Jaws and teeth are seen in 

 nine species. A constricted alimentary canal (gasterodela) 

 in four, and a simple conical one (coelogastricd) in nine. 

 They have two biliary glands at the commencement of the 

 alimentary canal; an ovarium is seen in twelve species, 

 but sexual glands and a contractile vesicle only in one of 

 the larger and smooth species, in which also four tremu- 

 lous gill-like organs are found. In three species respi- 

 ratory tubes emanate from the neck. The eye, which is 

 always present, indicates the existence of a nervous sys- 

 tem. In A. squamula, curvicornis, biremis, striata, and 

 foliacea, nervous matter is seen below it. Eight species 

 have their eggs attached to them after they are expelled. 

 They swim freely, though not very quick. 



(a). Species posteriorly devoid of spines and pedicle. 



707. ANURAEA (?) quadridentata. The four-horned A nu- 

 raea. Lorica oblong, with four horns anteriorly, the pos- 

 terior end obtuse, back tesselated. Length 1-2 16th, with- 

 out the horns. 



