2 34 Memoir Sears Foundation for Marine Research 



Table VIII. Comparison of L. grossidens with L. olidus. Proportional Dimensions 

 in Per Cent of Standard Length. 



23-24.3 in specimens 100 mm upward. 



Lycengraulis grossidens (Cuvier) 1829 



Sardinha Prata (Brazil) 



Figure 54 



Study Material. A total of 40 specimens, 40-220 mm TL, and many others as 

 well [presumably from Rio de Janeiro, Brazil and northward, as implied by Dr. Hil- 

 debrand under Relationship and Variation— y.h.o.\ Also 44 specimens, 97— 240 mm 

 TL, from southern Brazil, Paraguay, Uruguay, and Argentina, representing L. olidus 

 (Giinther), used as basis for measurements and counts in Tables viii-x. 



Distinctive Characters. See Relationship and Variation. 



Description. Proportional dimensions and counts, based on 40 specimens from 

 Rio de Janeiro, Brazil, and northward, 40—220 mm TL, in Table viii. 



Body strongly compressed, increasing in depth with age, its depth 3.85—4.4 in 

 SL in specimens 100 mm or more. Head with depth nearly equal to its length with- 

 out snout, 4.1—4.7 in SL. Snout projecting somewhat less than half of its length beyond 

 mandible, 5.6-6.9 in head. Eye 4.2—4.9. Postorbital part of head 1.6— 1.7 in head. 

 Maxillary little expanded, pointed distally, extending beyond joint of mandible, often 

 nearly to margin of opercle, 1. 15— 1.25 in head. Mandible i. 33-1. 6. Cheek some- 

 what longer than eye and snout in large examples, shorter than snout and eye in 

 specimens less than 100 mm, its posterior angle about 35°. Gill rakers slender, those 

 at angle fully as long as pupil. 



Dorsal fin with the longest rays usually reaching about to tip of last ray if de- 



