NO. 2133. FISHES TAKEN BY "ALBATROSS," 18S8— THOMPSON. 405 



is 37 mm. long and 23 mm. wide without its processes and is similar 

 in appearance to that shown by Dollo ^ for Raja arctowsJcii (although 

 but half as long). It is from station 2768, in 51^ fathoms off the 

 Gulf of St. George. 



2. LYCENGRAULIS GROSSIDENS (Cuvier). 



Numerous specimens from Montevideo and two from Buenos Aires. 

 Vertebrae 45. The teeth are not strikingly enlarged nor caninelike, 

 but resemble those in Agassiz's plate of the tyj^e. 



3. CLUPEA ARCUATA Jenyns. 



Clupea arcuata Jenyns, Yoyage Beagle, 1842, p. 134. Bahia Blanca. — Gunther, 

 Cat. Fish. Brit. Miis., vol. 7, 1SG8, p. 442; and other authors. 



Seven specimens from Montevideo (market?), the largest 110 mm. 

 in total length. These are in most respects similar to the specmiens 

 described by Jenyns and by Gunther, but do not correspond to the 

 Sardinella arcuata of Evermann and Kendall,^ which has, for instance, 

 14 dorsal rays. 



There are teeth on the tongue and on the anterior part of the jaws, 

 also along the maxillary edge behind the premaxillaries there are 

 fine spinations or teeth; on the palatines there are traces of teeth, 

 but none on the vomer. The following measurements and counts 

 give the variation in five specimens : 



D. 17 or 18; A. 21 to 23; scutes on ventral edge, 16 to 19 before 

 ventrals, 10 or 11 behind; head 4 or 4^ in length to base of caudal; 

 depth, 3 or 3|; eye, 3^ to 3^ in head; maxillary, 2 to 2^; least depth 

 of caudal peduncle, 2 or 2|; distance dorsal to tip of snout, 1| to 

 1§ in body length. A single specimen has but 15 anal rays, but no 

 other differences are evident, so that it is regarded as the same. 

 The ventrals are inserted under or slightly anterior to the dorsal 

 and the spines of the scutes are strong. 



It has been difficult to ascertain the genus to which this belongs, 

 and pending a revision of the confused clupeid genera it is left in 

 Clupea. 



4. BREVOORTIA TYRANNUS (Latrobe). 



Clupea tyrannus Latrobe, Traus. Amer. Pliilos. Soc, vol. 5, 1802, p. 77, pi. 1. 



Chesapeake Bay, U. S. A. 

 Clupanodon aureus Agassiz, (Spix) Pisces Brazil, 1828, p. 52. Brazil. 

 ? Alosa pectinata Jenyns, Voy. Beagle, 1842, p. 135, pi. 25. Bahia Blanca. 



Five specimens from Montevideo. These show a uniformly deeper 

 caudal peduncle than do specimens of Brevoortia tyrannus from 

 Woods Hole, the Gulf of Mexico, and Florida. The differences found, 

 if corroborated by additional material, would justify division from 



' Voyage Belgica, pi. 9, fig. 10. 



2 Troc. U. S. Nat. Mus., vol, :il, 1900, p. 74. 



