FISHERY BULLETIN: VOL. 74, NO. 2 



Ploeger, A. Poshkus, F. M. Ralston, S. B. Reiley, J. 

 M. Rosen, C. R. Ryan, K. D. Sexton, G. M. Treinen, 

 J. A. Young, and D. B. Zantiny. R. L. Brownell, 

 Jr., G. D. Fitzgerald, D. W. Rice, W. A. Walker, and 

 D. W. Waller contributed unpublished data. D. B. 

 Holts sectioned the teeth, and D. W. Rice assisted 

 with the readings. R. B. Miller processed and 

 examined the ovaries. T. D. Smith and N. K. Wiley 

 provided advice and assistance in data processing 

 and analysis. I. Barrett, P. J. H. van Bree, P. F. 

 Brodie, R. L. Brownell, Jr., W. Clark, W. E. Evans, 



C. L. Hubbs, T. Kasuya, W. H. Lenarz, J. G. Mead, 



D. W. Rice, D. E. Sergeant, T. D. Smith, and G. 

 Stauffer read the manuscript. We thank these per- 

 sons and others not mentioned for their invalu- 

 able assistance. 



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