1883.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 333 



tioo. It has, however, the bauds ami spots more strongly marked ; the 

 snout longer, the scales a little smaller, and, moreover, there are 7 anal 

 spines. 



IS. Thalassemia lucasanum (Gill.). 37154(3). From Tres Marias Islands. These 

 specimens are larger than Gill's types, 3^ inches long. 



Abroad black baud along side, its lower edge passing along lower 

 edge of eye and upper edge of pectoral; then along middle of body 

 curving upward to base of upper lobe of caudal; belly below this 

 abruptly paler, brownish posteriorly; a faint brown streak along sides 

 from behind pectoral to middle of caudal base. Dark lateral band fad- 

 ing insensibly above into the brown hue of the back; upper part of 

 back again black; head all dark, black above, the color gradually fad- 

 ing below to brown. Two pale bluish streaks from lower part of eye 

 downward and backward; a black spot at upper base of pectoral. 

 Dorsal black, with a narrow pale margin on the soft part; caudal pale, 

 its upper and lower rays abruptly black, and narrowly edged with pale. 

 Anal brown at base, pale at tip. Pectoral brown, with a blackish area 

 toward the tip. 



Depth of body equal to length of head, four times in length of body 

 to base of caudal. Head rather pointed; dorsal spines pungent; ven- 

 trals not filameutous. Scales before dorsal small, 6 in number. Caudal 

 lunate in adult, truncate in the young, the black outer rays produced 

 somewhat beyond the others. 



19. Gobius soporator Cuv. & Val. 37155 (10). Tres Marias Islands. 

 22. Eleotris sequidens (Jordan & Gilbert). 37142. From Eio Presidio. 



21. Philypnus lateralis Gill. 27140. (3). From Eio Presidio. 



22. Dormitator maculatus (Bloch). 3714:1. From Eio Presidio. 



This specimen agrees as well with the description of J), maculatus (At- 

 lantic form) as with that of D. latifrons (Pacific form) as these aire given 

 by Eiyenmann & Fordice (Proc. Acad. Xat. Sci. Phila., 1885, 71.) It 

 also agrees with the description of Rio Grande specimens given by 

 Eigenmann & Eigeumaun (Proc. Cal. Acad. Sci. 1887, 53.) If more 

 than one species of Dormitator exists in tropical North America, the 

 boundaries of the different forms are yet to be shown. 



23. Labrisomus delalandi (Cuv. & Val.). 37159. From Tres Marias. ( t 'Hum zoni- 

 fcr Jordan & Gilbert, 1881.) 



This species agrees very well with the published descriptionof L. dela- 

 landi. I therefore regard L. zonifer as a synonym of the latter, which 

 is a Brazilian species. D. iv, xvi, 11. A. IT, 18. Scales r>5. Head 

 3.\ in length ; depth 3J. 



24. Rupiscartes atlanticus (Cuv. & Val.). 37152 (2). From Tres Marias. 



Some specimens apparently males, with the anterior profile vertical 

 and very high ; fins high ; caudal lanceolate, the black median rays much 



