1 62 GILBERT 



5. Felichthys marinus (Mitchill). 

 Pernambuco ; Maceio. 



In two young specimens the pectoral and the dorsal spines are about 

 equal, and are much shorter than the length of the head. The anal 

 fin has 21 rays. The occipital buckler tapers rapidly backward, its 

 posterior half being very narrow and of nearly uniform width. 



Eigenmann is probably right in referring F. bahiettsis to the syn- 

 onymy of this species. 



6. Selenaspis herzbergii (Bloch). 

 Maceio. 



7. Aspistor luniscutis (Cuvier & Valenciennes). 

 Pernambuco ; Maceio. 



8. Netuma grandicassis (Cuvier & Valenciennes). 

 Maceio. 



9. Tetragonopterus bahiensis Steindachner. 



Two specimens, '$>^ and 70 mm. long, from the stone reef at 

 Mamanguape. 



T. bahietisis seems to differ from T. lacustris in the slightly larger 

 head and slenderer body. Our specimens agree well with the original 

 description, differing only in having one or two more scales along the 

 lateral line, and in having but two rudimentary anal rays. 



The humeral and caudal spots are intensely black, with well-defined 

 margins. The former is longitudinally oval, surrounded by a wide 

 lighter area, the posterior portion of which is slightly darkened. The 

 spot on caudal peduncle is widest opposite the base of the outer caudal 

 rays and is continued as a narrow streak to the tips of the median rays. 

 A faint darker band runs forward along the sides, and becomes fainter 

 and narrower anteriorly. 



The head is contained 3| times in the total length to base of caudal ; 



depth 2\. Eye 3^ in head. Scales 34 or 35 ,^-, the longitudinal 



rows counted from origin of dorsal to base of outer ventral ray. The 

 lateral line is complete. 



D. I, 10 or I, 11; A. II, 25 or II, 29. 



The maxillary reaches to below the anterior part of the eye. The 

 distance from the tip of the snout to the end of the maxillary is less 

 than that from the tip of the snout to the hinder edge of the pupil. 

 By the aid of a lens, the maxillary in the larger specimen can be seen 

 to have its entire edge finely crenulatcd. 



