244 Memoir Sears Foundation for Marine Research 



of its length beyond mandible, 7.8-9.2 in head. Eye 5.0-5.8. Postorbital part of head 

 1.37— 1.5 in head. Maxillary rounded distally, scarcely reaching joint of mandible, 

 1.2 in head. Mandible 1.2 — 1.27. Cheek narrow, its length nearly twice snout and 

 eye, its postorbital angle about 30°. Gill rakers short, flat, the longest not more than 

 half of length of pupil. 



Dorsal fin with the longest rays extending to, or a little beyond, tip of last ray if 

 deflexed, its origin about equidistant between base of caudal and upper anterior angle 

 of gill openings. Anal with a rather prominent lobe anteriorly, its origin under, or some- 



FiGURE 58. Lycengraulis barbouri, type specimen, 290 mm TL, 237 mm SL, from Rio Poty, Brazil, MCZ 

 35277. Drawn by Alice C. Mullen. 



what in advance of, middle of dorsal base, its base 3.8—4. i in SL. Pelvic reaching much 

 less than halfway to anal, inserted somewhat nearer to base of pectoral than to origin 

 of anal. Pectoral reaching to, or slightly beyond, base of pelvic, i .3— i .4 in head. Axil- 

 lary scale of pectoral about 75 "/o of length of fin, 1.95— 2.1 in head. 



Color. Old specimens, in alcohol, grayish above. Lower 75 "/o of body and 

 head plain silvery. Fins unmarked, except for an indication of a black margin on 

 caudal. 



Range and Habitat. Known only from northern Brazil, from the Rio Poty, a trib- 

 utary of the Rio Parnahyba, and from the Belem (Para) market. [That this species was 

 obtained in the Belem market, far removed from Rio Poty, seems to indicate that the 

 species may well be marine. — y. h.o.] 



Synonyms and References: 



Lycengraulis batesii Starks (not of Giinther), Stanf. Univ. Publ., Univ. Ser., 191 3: 11 (specimen from Pard, 



Brazil; found to be L. barbouri). 

 Lycengraulis grossidens Jordan and Scale (in part not of Cuvier), Bull. Mus. comp. Zool. Harv., ty, 1926: 383 



("Rio Puty"= Rio Poty, Brazil; specimens are L. barbouri). 

 Lytengraulis barbouri Hildebrand, Bull. Bingham oceanogr. Coll., 8 {2), 1943: 151, fig. 69 (orig. descr. ; type 



local. Rio Poty, tributary of Rio Parnahyba, Brazil; type MCZ 35277; cf. L. batesii). 



