250 



Inst., Miscell. Coll., v. 49, 1907, P- 142; Rathbun, I.e., p. 331, pi. 2, f. 9, textfig. 13. 



Hab. China Sea, Japan, Gulf of Siam. In Mero'c quadrata. 

 P. pcdinicolus Burger, I.e., p. 365, pi. 9, f. i, pi. 10, f i; Nobili, Ann. Sc. Nat. (9), t. 4, 



1906, p. 303. Hab. Philippines and Red Sea. In Pectcn radula. 

 P. perezi Nobili, Bull. Mus. Paris, t. 11, 1905, p. 164-, Bull. Seient. Franee et Belgique, t. 40, 



1906, p. 147, pi. 5, f. 25. Hab. Persian Gulf. 

 P. pcrnicohis Burger, 1. e., p. 375, pi. 9. f- i?, p'- 1°- ''• i^^ Nobili, Ann. mus. eiv. stor. 



nat. Genova (2), t. 20, 1899, p. 264; Nobili, Ann. Se. Nat. (9), t. 4, 1906, p. 303 . 



Hab. Philippines, New Guinea and Red Sea. 

 P. pholadis de Haan (= P. pisoides Ortmann), Faun. Japon., Crust., 1S35, p. 63, pi. 16, 



f. 7; Ortmann, Zool. Jahrb., Syst., Bd 7, 1894, p. 698, pi. 23, f ii; Adensamer, 



Ann. Hofmus. Wien, Bd 12, 1897, p. 107. Hab. Japan. 

 P. pihimnoides Nobili, Bull. Mus. Paris, t. 11, 1905, p. 410; Nobili, Ann. Sc. Nat. (9), t. 4, 



1906, p. 307, textfig. 12; Laurie, Journ. Linn. Soc. London, v. 31, 1915, p. 466. 



Hab. Red Sea. In sponges and Holothurians. 

 P. pisum (Linne) Latreille. Literature: Adensamer, Ann. Hofmus. Wien, Bd 12, 1897, p. 106; 



Borrad.\ile, Brit. x'\ntarct. "Terra Nova" Exp., v. 3, n° 2, 1916, p. 100, textfig. 12. 



Hab. New Zealand. 

 P. placjuiae Hornell et Southwell, Rep. Gov. Baroda Mar. Zool. Okhamandal, prt i, 1909, 



p. 99, figs. Hab. British India. 

 P. pitrpurens Aleoek, 1. c., p. 339; 111. Zool. "Investigator", Crust., prt 10, 1903, pi. 62, 



f. 6; BoRRADAiLE, Faun. Geogr. Maldives etc., v. i, 1903, p. 431 ; Nobili, Ann. 



Sc. Nat. (9), t. 4, 1906, p. 303. Hab. Andamans, Felidu Atoll and Red Sea. 

 P. quadratns Rathbun, I.e., p. 333, textfig. 15. See also the present paper, p. 261. Hab. Gulf 



of Siam. 

 P. rhombifer Burger, I.e., p. 374, pi. 9, f. 15, pi. 10, f 14. Hab. Philippines. In Pectuncuhis 



auriflitus. 

 P. ridgewayi Southwell, Ceylon Mar. Biol. Rep., v. i, prt 5, 19 11, p. 224, figs. Hab. Ceylon. 

 P. rohindatus Burger, I.e., p. 378, pi. 9, f. 21, pi. 10, f. 19. Hab. Philippines. In Circe. 

 P. rotixi H. Milne-Edwards nee Paulson, Ann. Se. Nat. (3), t. 20, 1S53, p. 218, pi. 11, f. 7. 



Hab. Indian Ocean. 

 P. schauinslandi Lenz. Zool. Jahrb., Syst., Bd 14, 1901, p. 468, pi. 32, f. 15 — 18. Hab. New 



Zealand. In Mytihts. 

 P. semperi Burger, I.e., p. 382, pi. 9, f. 28, pi. 10, f. 27. Hab. Java. In cloaca oi Holotlmria 



fusco-cinerea. 

 P. similis Burger, I.e., p. 373, pi. 9, f. 14. Hab. Philippines. 



P. socius Lanchester, Proc. Zool. Soe. London, 1901, p. 551, pi. 33, f. 3. Hab. Penang. 

 P. tenuipes Burger nee Borradaile, I.e., p. 371, pi. 9, f. n, pi. 10, f. 11. Hab. Philippines. 



In a Holothurian. ' 



P. trichopiis n. sp. See the present paper, p. 256. Hab. Moluccas. In Melcagrina. 



