374 



CHAS. CHILTON. 



six posterior segments of the peraeon are represented, with 

 possibly also a portion of the first. Portions of corres- 

 ponding peraeopoda are present, but they are somewhat 

 confused, and scarcely show anything additional to what 

 has been already described in the other specimens. The 

 broad basal joints of peraeopoda 5 and 6 are, however, 

 distinct, and apparently these limbs had a close general 

 resemblance to those of the living P. australis. As in other 

 specimens the depth of the peraeon segments is about 3 mm. r 

 while the greatest depth of the pleon is about 5 mm. 



The first five segments of the pleon are clearly indicated,, 

 especially the inferior margins of the pleural portions. The 

 surface bearing the sixth is depressed below that of the 

 others, and the impression on it is imperfect. 



The total length of the part of the body preserved is 

 16 mm., and, as only the head and part of the first peraeon 

 segment and the terminal segment of the pleon are wanting, 

 the animal was probably about the same size as specimen 

 3, i.e., measuring 18 or 19 mm. in length. 



Specimen 5, Fig. 5. (Block 236). 



V 





w 



Fig. 5. Phreatoicus wianamattensis, (No. 236d). X 5. 



Of this specimen only the posterior portion of the peraeon 

 is present, and that is considerably distorted, and too 

 imperfect to add any further information; but fortunately 



