384 MR JAMES MURRAY ON A NEW FAMILY 
EXPLANATION OF PLATES. 
The drawings of the complete animals are all made to a uniform scale, with the exception of Microdina, 
which is drawn larger. The separate details are drawn of any convenient size. In the descriptions the only 
measurement given is the greatest length of the animal. All other measurements obtained are put into the 
drawings. Whenever possible the width of the corona, collar, neck, trunk, rump, and foot are measured, 
also the length of head, neck, trunk, foot, spurs, and jaws. These sizes, expressed in figures, convey but a 
vague impression of the appearance of an animal unless accompanied by a drawing. They are therefore 
omitted from the text. 
The form of the upper lip is carefully drawn, but is not included in the descriptions, as no common names 
for its various parts have yet been agreed upon. 
Puate I, 
1. Microdina paradoxa, n. sp. 
a, dorsal view, example from L. Vennachar, 1902. | _—e, f, antenna in different degrees of extension, 
b, lateral view, another L. Vennachar example. | g, foot, showing toes and glands under pressure. 
c, ventral view, variety from L. Treig, 1904. | h, toes, dorsal view. 
d, deposition of egg. | 7, rostrum, ventral side. 
Puate II. 
a, head of Callidina papillosa, ventral side. k, l, m, nv, 0, jaws of Microdina, five views of same 
b, head of Microdina paradoxa,  ,, 3S pair. 
c, head of Adineta barbata, AS 3 k, direct ventral. 
d, jaws of Philodina bryce. 1, oblique ventral. 
e, jaws of Microdina, form with three loops. m, direct dorsal. 
f, jaws of Melicerta, n, dorsal, under pressure, rami turned on side. 
g, h, 7,7, four varieties of spurs of Mierodina. 0, lateral. 
Prate IIT, 
2. Callidina angusticollis, n. sp. 
2a, animal in case, feeding, dorsal. | 29, spurs. 
2b, side of head, feeding. | 2h, side of foot and rump. 
2c, jaws. 27, animal in case, in characteristic attitude. 
2d, head seen from above. 2), side of rostrum. 
2e, section of oral seement at thickenings. 2k, front of rostrum. 
27, section of neck. 
3. Callidina annulata, n. sp. 
3a, animal in Frullania cup, feeding, dorsal. 3d, jaws. 
y 5) Do) irl 
3h, side of head. 3e, antenna. 
3¢, front of rostrum. 37, spurs. 
