Fig. 21. Crustacean larvae etc. 

 Ill and /), 1st and 3rd stages of the nauplius of Tigriopus. 2, 4th naupliiis of Cnlaniis. 3, 5th nauplius 

 oi Centropages. 4, >th nauplius o( Oitlioiia. 5, 2nd nauplius of acorn barnacle, BaUimis. 6, Cypris 

 stage of same. 7, Adult goose barnacle, Lepas. 8, 3rd zoea of crab, Portuiitis piiher. 9, Megalopa 

 of same. 10, 2nd nauplius of euphausid, Thysanoessa inermis. 11, 2nd calyptopis of cuphausid, 

 ThysciiioesSii loiigiidudata. 12, phyllosoma of spiny lobster, Paliiuinis. 



