Percy Sladen Trust Expedition 



(Hickson) 



TRANS. LINN. SOC. SER. 2, ZOOL. VOL. XIV. PL. 31 



8. Polytrema x 4;. g. Homotrema x 4' . 10. Sporadotrema X 2. 

 11 — 17. Sporadotrema, various magnifications. 



POLYTREMA FROM THE INDIAN OCEAN 



