PLATE E. 



Fig. 1. AJona quadrangular is ^ female. 



A. anteunule. Lb, labrum. Md. mandible. P-a. post- 

 abdomen. An. anus. F. c. musculus flexor caudalis. 

 E. c. musculus extensor caudalis. A. g. anal gland, 

 n. g. nutritive globule in erabr3'o. t. tail of embryo. 

 I, II, III, IV, V. five pairs of feet of embryo, mx. maxilla 

 of embryo, at 2. antennae of embryo, at^. antennules 

 of embryo. H. heart. Sh. g. shell gland. Ov. ovary. 

 Md. m. muscle of mandible. At. ^m. muscle of antennae. 

 E. eye, s. oe. g. supra-oesophagal ganglion. P. F. pig- 

 ment fleck. 



brain, eye and pigment fleck of same. 

 Pleitroxus 2)rocurvus^ female, 

 foot of same. 

 Acroperus leucocephalus. 

 Alonella excisa, female; 6a. shell of same, 

 antennae of same. 

 Alonopsls latissima^ female. 

 Alonopsis media^ female. 

 Camptocercus macrurus^ post-abdomen. 



Fig. 10a. lower angle of shell of same. 



Fig. 



2. 



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10. 



