EXPLANATION OE PLATES 
Tab. I. 
Fig. 1. Apus cancriformis. 
a. Mandible, b. Mouth. c. Antenna, d. First- pair of feet. 
e. Second do. /. Eleventh do. g. Twelfth do. h. Branchial plate. 
2. Young animal. 3. Do. a little older. 
Tab. II. 
Fig. 1. Nebalia bipes. 
a. First pair of jaws. b. One of the branchial feet. c. One of the 
natatory feet. 
2, 3. Artemia salina , male and female. 
Fig. 2, a. Antenna of male. b. Antennule. c. One of the branchial feet. 
4. Do. young. 
Tab. III. 
Figs. 1, 2. Chirocephalus diaphanus , male and female. 
Tab. IV. 
Chirocephalus diaphanus. 
Fig. a. Antennule. b. Prehensile antennse of male. c. Appendages 
belonging to them. c*. Profile view of ditto, d. Triangular plate 
of ditto, e. Head of female in profile, with antennse. f. Dorsal 
view of ditto, to show the eyes. g. Labrum. h. Mandible. 
In Figs, b, c, -c*, e, and f — a , represents the antennules ; b, large 
antennse ; c, trunk ; d, flexible appendages ; e, triangular plate ; 
f organ similar to what is seen in Evadne ; g, eyes ; h, remains 
of foetal eye ; i, organ similar to what Zaddacli calls in Apus 
the glandular processes of stomach ; k, mandible ; m } labrum. 
Tab. V. 
Chirocephalus diaphanus. 
Fig. a. Jaws. * One of the setse magnified, b. One of the branchial 
feet. c. Male organ of generation. 
Fig. 1. Ovum. 
2. Young, half detached from ovum. 
3. Young, while still in internal envelope. 
4. Do. two hours old. 
5. Do. a little further advanced. 
6. Do. in a more advanced stage of development. 
7. Do. still further advanced. 
