EXPLANATION OF THE PLATES. 663 



Plate XXII. 

 Fig. A. Pilumnus pidcher, adiilt <$ , nafc. size, a, larger chela, 



B. Pilumnus semilanatus, adult tf , x 2. 6, larger chela, 



X 1£. 



C. Pilumnus labyrinthicus, x 3. c, outer view of chela, X 3. 



Plate XXIII. 



Fig. A. Inferior view of the frontal, antennal, and part of the buccal 

 regions of Cryptocceloma jimbriatiun, $ , x 8. 



B. Achelous gramdatus, var. unispinosus, adult <S , x li. 



b, inferior view of the antenna and part of the orbit of 

 the same specimen, x 4. 



C. Goniosoma spiniferum, 3 , x 2. c, inferior viow of the 



antenna and part of the orbit, x 4. 



Plate XXIV. 



Fig. A. Camptoplax coppingeri, x 4. a, the frontal and antennal 

 regions, epistome, and palate, viewed from below, magni- 

 fied. 



B. Pseudorhombila vestita, var. sexdentata, tf , x 3. b, frontal 



and orbital regions ; b', outer view of chela, x 3. 



C. Pseudorhombtta sidcatifrons, var. australiensis, 5 ■> X 3. 



c, frontal and orbital region ; c', outer view of chela, 

 x 3. 



Plate XXV. 



Fig. A. Macrophihalmus punctulatus, tf , x 4. a, outer view of 

 chela, x 4. 



B. Ceratoplax ? arcuate;, x 3. b, orbital region, showing the 



structure of the antennae and their position in the orbits, 

 &c. ; b', postabdomen of the male, x 4 ; b" , outer view of 

 chela, x 4. 



C. Ceratoplax! Icevis, x 4. c, orbital region, showing the form 



of the eye-peduncles and position of the antennas ; c\ outer 

 view of chela, x 4. 



