Figures 21-27. — Tiwca hnpressus, female. Figures 21-23, from Chilomycterus sehoepfi taken oflf Cape 

 San Bias, in the Gulf of Mexico; 24 25, from C. sehoepfi taken off St. Simons Island, Ga.; 26-27, from 

 C. antennatus at Montego Bay, Jamaica. 21. Immature adult with short trunk, dor.sal (A). 22. Imma- 

 ture adult with guitar-shaped trunk, dorsal (A). 23. Immature adult with circular trunk, dorsal 

 (A). 24. Entire, dorsal (A). 25. Same, lateral (egg sacs omitted) (A). 26. Entire, dorsal (egg sacs 

 omitted) (A). 27. Entire, showing absence of anterior lobes in trunk (egg sacs omitted) (A). 



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U.S. FISH AND WILDLIFE SERVICE 



