210 CEYLON PEARL OYSTER REPORT. 



PLATE IV. Ccetrodes pMas, n. gen. et n. sp. 



Fig. 48. Dorsal view of female in its burrow on a gill filament. 



49. same female removed from its burrow (enlarged). 



50. First antenna. 



61. Second antenna. 



52. Mouth-tube, second maxilla (a), and first maxilliped (b), 



53. Second maxilliped. 

 Figs. 54 and 55. First and second swimming legs. 



56 57. Dorsal and ventral views of genital segment and abdomen. 



PLATE V. Hatschekia sp. and Peniculus furcatus, KROYER. 



Fig. 58. Dorsal view of Hatsclwkia sp., female. 

 59. Ventral view of head and first two thorax segments, showing (a) first antenna; (b) second 



antenna; (c) second maxilla ; (d) first maxilliped ; (e) second maxilliped ; (/) first swimming 



leg ; (y) second swimming leg. 



,, 60. Ventral view of abdomen, showing anal papillae and spermatophores. 

 61. Dorsal view of female of Peniculus furcatus, KROYER. 

 62. Ventral view of same, showing egg-cases. 

 ,, 63. Dorsal view of male. 

 64. Profile view of head, showing (a) rudimentary first antenna; (b) prehensile second antennae; 



(c) rudimentary second maxillipeds. 



65. End view of fused second antennae, showing the terminal claws. 

 , 66. Ventral view of abdomen of female. 



