Annals of the Transvaal Museum. 
9 
ciliate. The intestine is round. The glands between the mastax and the 
stomach are large. 
A large, elliptical, thick shelled egg has been seen in the body. It 
measured 150^ by 90^. 
C. gunningi is one of a group of species of which C. habita Bryce may 
be taken as the type. It is only necessary to compare it critically with 
two species, C. jormosa and C. bullata , which also have bosses on the first 
foot- joint. C. jormosa ( 24 ) is easily distinguished, as the whole trunk is 
papillose. C. bullata Murray was described as a mere variety of C. habita 
( 23 ), and is in this paper for the first time treated as a distinct species. It 
has a strong superficial resemblance to C. gunningi , yet differs in many 
characters. It is smaller, and has a prominent collar ; the lobes of the 
upper lip meet in the middle line ; there is no boss on the anal segment, 
and there are eight bosses on the first foot-segment. Attention to these 
points will make it easy to distinguish the two species. The armature of 
the foot of C. gunningi was constant in character in a large series of examples. 
Habitat. — Pretoria, in moss collected by J. Hewitt; very abundant. 
Callidina hewitti sp. n. (Plate II, figs. 12a-12b). — Specific characters : 
Of moderate size, hyaline ; corona large, collar prominent, lobes of upper 
lip separated b}^ small interspace ; rostrum broad, antenna short ; teeth 
about five in each jaw ; first segment of foot with a large boss ; spurs 
broad-based, acuminate, divergent, without interspace. 
General description. — Length, when feeding, 360/w, diameter ot corona 
9 d^, collar 70 /■*, neck 50^, trunk 104^, across spurs 30^, length of jaw 
30|t4. The discs are about 35/^ in diameter and bear long central seta, 
which arise from small papillae ; the interspace between the discs is about 
22^. The skinfolds forming the collar are prominent, and are continued 
on to the upper lip where they end in large rounded lobes, separated by 
a small deep sulcus. Each jaw is triangular, and bears four or five strong 
teeth, with one thinner and numerous fine striae. 
The trunk is barrel-shaped, with few, wide, longitudinal plicae. The 
rump is pyriform, with its two segments scarcety separated. The foot 
is four-jointed, the first joint bearing a boss like that of C. habita , but on 
the extreme posterior edge of the segment. The spurs are like those of 
G. habita. There is nothing peculiar in the internal organization. The 
stomach is voluminous,*' and the intestine shortly oval. 
C. hewitti is another species related to C. habita. The numerous 
teeth distinguish it from all the species of that group, except C. vesicularis 
Murray ( 21 ), which is easily known by the two knobs on the first segment 
of the loot, and by the large vibratile tags. C. hewitti differs from 
C. h< bita in some minor characters — the separation of the lobes of the 
upper dp, and the more posterior position of the coot-boss. 
Habitat. — Pretoria, among d-os? collected by T. Hewitt, April, 1910 ; 
several examples, but not abundant. 
Callidina plicatula, sp. n. (Plate I, figs, la-lb). — Specific characters : 
Size moderate ; slender ; corona fairly large, discs separated by flat 
interspace ; upper lip rounder, having a keystone-shaped central portion ; 
collar prominent ; antenna short ; teeth 2-2 ; trunk deeply plicate ; 
