Some African Rotifers. By J. Murray, 5 



(the outer processes at each end of the row) : lateral knobs, two at 

 each side ; spines on anterior margin of trunk very small ; two 

 papillae on preanal ; semicircular lobe on first foot joint. 



The differences from the commonest form are not great, the 

 chief being the different form of the end spines of the main row, 

 and the reduction of the anterior spines. Weber does not mention 

 the lateral spines, or those on the preanal, but these are present in 

 the majority of the forms. Another form has the dorsal row normal, 

 and is strongly papillose. 



Callidina formosa Murray (15), 



Callidina formosa also seems to prefer warm climates. The 

 Central African form differs from the type in having the foot and 

 anal segment smooth, and the papillae on the preanal very small. 

 In the type the large papillae continue on to the rump, and even 

 to the first foot joint, scarcely reduced in size. 



Callidina punctata sp. n. Plate II. figs, lla-lld. 



Specific characters. — Of moderate size, stout ; colour dull 

 opaque yellow, reddish in central parts ; corona large ; collar 

 prominent ; upper lip divided into two elevated lobes ; antenna 



short ; teeth - in each jaw ; skin of trunk stronsrlv 



1 + 2+1 



stippled ; foot and spurs papillose ; foot, 4-jointed ; spurs, divergent, 



obtuse, or subacute, with small interspace. 



General description. — Measurements of a small example : length. 

 225 ll ; diameter of trunk, 75 ll ; corona, 58 /u, ; neck, 46 /a ; across 

 jaws, 25 ll. Though the average size is small, it occasionally 

 attains to considerable dimensions. There are central papillae and 

 set* on the disks. The rostrum is short and thick, and the 

 lamellae are separated. The length of the antenna is half the 

 diameter of the neck. The lobes of the upper lip, which are like 

 those of Callidina habita, can be separated. The jaw has a broad 

 border, and the principal teeth are very thick. The whole trunk 

 and foot are dotted. The dots sometimes appear as papillae between 

 the folds of the trunk. On the foot, and especially the spurs, they 

 are distinct papillae. The spurs vary somewhat in form, being 

 longer or shorter, obtuse or subacute, with the interspace some- 

 times nearly obliterated. The toes are small and short. The walls 

 of the stomach contain large reddish globules. The egg is elliptical, 

 with both poles produced, like that of C. habita and C. plicata, etc. 

 It measures 120//, by fiO//,. 



C. punctata is closely related to C. plicata, though it is not very 

 like it in general appearance. It differs in many points — the 

 stouter form, deep colour, different form of upper lip (which has, 



