NOTE Balart et a\ Notes on the biology of Cephalurus cephalus and Parmaturus xaniurus 



221 



250 



200 



— 150 



■fi 100 



^ 50 



50 100 150 200 250 300 350 400 

 Total length (mm) 



g 



60 

 45 

 30 





50 100 150 200 250 300 

 Total length (mm) 



350 



400 



Figure 2 



Parmaturus xaniurus. (Al Length-weight relationship. (B) 

 Relationship between total length and clasper length. 



Fernandez, and the crew of the RV El Puma who were 

 always helpflil in our work. We gratefully acknowledge 

 the valuable comments of Gregor Cailliet, Robert N. 

 Lea, Jim Ellis, and two anonymous referees. We thank 

 Ellis Glazier for editing the text in English. We also 

 thank the Universidad Nacional Autonoma de Mexico, 

 especially Ingvar Emilsson, for supporting the projects 

 of CIBNOR, UABCS, and CICIMAR and providing the 

 RV El Puma for the cruise EP9505 at no cost. 



Literature cited 



Castro, J. I. 



1983. The sharks of North american waters. 

 University Press, Austin, TX, 180 p. 



Texas, A&M. 



Castro-A^irre, J. L. 



1981. Especies de la Familia Scyliorhinidae (Elasmo- 

 branchii, Galeoidea), de la Costa Occidental de Mexico, con 

 especial referenda a Cephalurus cephalus (Gilbert). An. 

 Esc. Nac. Cienc. Biol. Mex. 24:71-93. 



Compagno, L. J. V. 



1984. FAO species catalogue. Sharks of the world: an anno- 

 tated and illustrated catalogue of shark species known to 

 date. Part 2: Carcharhiniformes. FAO Fish. Biol. Synop. 

 (125), vol. 4, pt2: 2.51-6.55. 



Cox, K. W. 



1963. Egg-cases of some elasmobranchs and a cyclostome 

 from California waters. Calif Fish and Game 49(4):271- 

 289. 



Cross, J. N. 



1988. Aspects of the biology of two scyliorhinid sharks, 

 Apristurus hrunneus and Parmaturus xaniurus. from the 

 upper continental slope off southern California. Fish. 

 Bull. 86(41:691-702. 



Kato, S., S. Springer, and M. H. Wagner. 



1967. Field guide to Eastern Pacific and Hawaiian sharks. 

 U.S. Fish and Wildl. Serv., Circ. 271:1-47. 

 Lee, R. S. 



1969. The filetail catshark, Parmaturus xaniurus, in mid- 

 water in the Santa Barbara basin off California. Calif. 

 Fish and Game 55( 1 ):88-90. 

 Mathews, C. P., and M. F. Ruiz. 



1974. Cephalurus cephalus. a small shark, taken in the 

 northern Gulf of California, with a description. Copeia 

 1974(2): 556-560. 

 Melendez, C. R., and D. R. Meneses. 



1989. Tiburones del talud continental recolectados entre 

 Anca ( 18 T9'S) e Isla Mocha (38''30'S ), Chile. Invest. Mar.. 

 Valparaiso, 17:3-73. 



Pequeiio, R. G. 



1989. Feces de Chile. Lista sistematica revisada y comen- 

 tada. Rev. Biol. Mar. 24(2): 1-132. 

 Springer, S. 



1979. A revision of the catsharks, family Scyliorhinidae. 

 U.S. Dep. Commer., NOAA Tech. Rep. NMFS Circ. 422, 

 152 p. 

 StatSoft, Inc. 



1995. STATISTICAfor Windows. StatSoft, Inc., Tulsa, OK. 

 3782 p. 

 Wourms, J. P. 



1977. Reproduction and development m chondrichthyan 



fishes. Am. Zool. 17:379-410. 

 1981. Viviparity: the maternal-fetal relation in fishes. Am. 

 Zool. 2:473-515. 



