Explanation of Plate I. 



Illustrating Mr. G. C. Champion and Dr. T. A. Chapman's 

 " Observations on some species of Orina." 



Larvae, etc., of Orina, all enlarged. 



Fig. 1. Orina gloriosa, full-grown. 



2. Orina cacalise, ,, ,, (at junction of thorax and abdomen 



the incisions are not quite correctly 

 shown.) 



2a. ,, ,, larva in stage 1. 



3. Orina vittigera, full-grown. 



'da, b, c. ,, anterior, intermediate "and posterior legs, as trans- 



parent objects from cast larva-skin; a piece 

 that looks like a trochanter is evident, but it 

 is not separately articulated. 



,, antenna partially retracted. 



,, ,, fully extended. 



,, labium. 



,, labrum. 



3d. 



Be. 

 3/- 

 3a. 

 3h. 



,, mandible, with portion of margins more enlarged 

 to show the serrations on the teeth. 



,, maxilla. 



4. Orina tristis, var. smaragdina, full-grown. 



4a. ,, ,, ,, ,, ,, ,, terminal segments, as 



exserted Avhen using anal sucker 

 or foot. 



4I>. ,, ,, ,, ,, Egg showing line of dehiscence 



and scale of hexagonal sculpture. 



Explanation of Plate II. 



Illustrating Mr. G. C. Champion and Dr. T. A. Chapman's 

 " Observations on some species of Orina." 



Ovaries, etc., of Orina vittigera, photographed from specimens. 



Fig. 1. Shows ovarian tubules, oviduct, etc., from a specimen that had 

 completed the deposit of larvae. 



2. Same parts, with extremity of abdomen and portion of alimentary 



canal, showing embryos in the ovarian tubules. 



3. A similar specimen. Some of these embryos are fully developed 



larvae, as may be seen in separated specimen in next fig. 



4. Separated embryos, a little more enlarged. (None of these show 



distinctly in the photographs, how fully developed larvae these 

 embryos are, but they do show that they are still in the ovarian 



tubules.) 



