[29] REVIEW OF THE SCIZNIDA. 371 
20. CESTREUS PHOXOCEPHALUS. 
Cynoscion phoxocephalum Jordan & Gilbert, Bull. U. 8. Fish Com., 1831, 318 (Panama). 
Habitat.—Pacific coast of tropical America; Panama. 
This species is not uncommon about Panama. It somewhat resembles 
Cestreus nobilis, but it is not known to reach the large size of the latter. 
The tapering form of the head reaches an extreme in this species, and 
the silvery luster of the scales is brighter than in any other. 
A specimen of this species from Panama is in the museum at Cam- 
bridge. 
21. CESTREUS LEIARCHUS. 
Otolithus leiarchus Cuv. & Val., Hist. Nat. Poiss., v, 78,1830 (Brazil; Cayenne). Gtin- 
ther, Cat. Fish. Brit. Mus., ii, 308, 1860(Bahia). Jordan, Proc. U.S. Nat. Mus., 
1826, 540 (pote on type of Cuvier & Valenciennes). 
Habitat.—Coasts of Brazil and Guiana. 
This species is known to us from the examination of the type, a dried 
skin of a young example in the museum at Paris. The absence of the 
anal spine (‘ letarchis ”) is due to its being covered by varnish. 
The description given in our analysis is taken from an example (34500, 
U.S. Nat. Mus.) from unknown locality (Brevoort Coll.) and from speci- 
mens trom Rio Janeiro, Porto Alegre, Bahia, and Santos, in the mu- 
seum at Cambridge. C. letarchus is closely related to Cestreus phoxo- 
cephalus, but it more strongly resembles the typical Cestret than the 
latter species does. 
22. CESTREUS VIRESCENS. 
Otolithus virescens Cuv. & Val., Hist. Nat. Poiss., v, 72, 1830 (Surinam). 
Cynoscion virescens Jordan, Proc. U.S. Nat. Mus., 1886, 588 (name only). 
Otolithus microps Steindachner, Neue Fisch-Arten k. k. Museen Wien, Stuttgart, 
und Warschau, 38, plate viii, fig. 2, 1879 (Perto Alegre, Brazil). 
Habitat.—Coasts of Guiana and Brazil. 
We know this species from a specimen (4584, M. C. Z.) 18 inches long 
from Victoria, Brazil. . 
This specimen agrees well with Steindachner’s description of Otoli- 
thus microps. The scanty account given by Cuvier and Valenciennes 
of Otolithus virescens agrees, so far as it goes, with O. microps, and 
with no other South American species known. We have been unable 
to find the type of virescens in the museum at Paris. There seems to be 
little reason for doubting the identity of the two. We have therefore 
taken the older name instead of microps. 
23. CESTREUS MICROLEPIDOTUS. 
Otolithus microlepidotus Cuv. & Val., Hist. Nat. Poiss., v, 79, 1830 (Surinam). Giin- 
ther, Cat. Fish. Brit. Mus., ii, 211, 1860 (copied). Steindachner, Neue und 
Seltene Fische k.k. Zool. Mus. Wien, 39, 1879 (Maranhao). 
Cynoscion microlepidotum Jordan, Proc. U. S. Nat. Mus., 1886, 588 (name only). 
Habitat.—Coasts of Surinam and Brazil. 
