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CEYLON PEARL OYSTER REPORT. 



EXPLANATION OF THE PLATES. 

 PLATE I. 



Fig. 1. Penccus indicus, Milne-Edw., head, side view, x 4. 



2. Parapenceus mogiensis, Rathbun, thelycum in Ceylon specimen, x 8. 



3. gallensis, n. sp., head, side view, x 5. 

 3a. thelycum. x 4. 

 3b. ,, petasma. x 10. 



4. Caradina vitiensis, Borradaile, rostrum, side view, x 12. 



5. Urocaris Imgicaudata, Stimpson, head, from above, x 7. 

 5a. rostrum and carapace, side view, x 7. 



6. Naulicaris grancliroslris, n. sp., side view, x 3. 

 6a. ,, rostrum, side view, x 3. 

 6b. head, from above, x 5. 

 6c. ,, ,, telson, from above, x 3. 



PLATE II. 



7. Latreutes ceyhnensis, n. sp., rostrum and anterior edge of carapace, x 65. 

 7a. ,, head, from above, x 65. 



7b. ,, 3rd maxilliped. x 36. 



7c. 2nd thoracic leg. x 36. 



7d. 3rd thoracic leg. x 36. 



7e. ,, telson, dorsal view, x 28. 



8. Nauticaris fvMliroslris, Sp. Bate, 4th thoracic leg. x 30. 



9. Synaljpheus cwinatus, de Man, head, from above, x 12. 

 9a. ,, 3rd thoracic leg. x 54. 



9B. ,, telson and right uropod. x 20. 



10. Athanas arientaiis, n. sp., head, from above, x 30. 

 10a. side of head, x 30. 



10b. 1st thoracic legs; small chela, x 25. 



