2240 Btdldin 47, United States National Museum. 



almost Tmifonu light brownish; lips black, the fins only slightly dusky, 

 the caiulal with elliptical light spots; a roundish dusky spot at base of 

 caudal; branch iostegal membranes not black. Many specimens from the 

 northern part of the Gulf of California, at Albatross Stations 3016 and 3017, 

 in 76 and 58 fathoms. This species agrees with Bollmannia macropoma in 

 its elongate form, comparatively low fins, and in the absence of a black spot 

 on the spinous dorsal. It difl'ers conspicuously in the very short head 

 and narrow opercle, and in the presence of a black spot at base of tail. 

 The eye is also larger and the fins higher. None of the specimens shows 

 dusky bars on the sides, a conspicuous feature in7>. macropoma. (Gilbert.) 

 (6Tty/.ia, spot; ovpd, tail.) 



Bolliiianniastigmatura, Gilbert, Proc. U. S. Nat. Mus. 1891, 556, Gulf of California, Alba- 

 tross Stations 3016, 3017. 



817. ABOMA, Jordan & Starks. 



Aboma, Jordan & Starks, Proc. Cal. Ac. Sci. 1895, 497 {etheo.itoma) . 



This genus, allied to Microgohlus, is distinguished by the large, ctenoid 

 scales, which cover the body ; head naked, rather long, pointed in profile ; 

 the mouth moderate, not very oblique ; teeth rather strong. Dorsal spines 

 more than 6, none of them filamentous ; soft dorsal and anal short ; no flaps 

 on shoulder girdle. Cranium with a slight median crest. (The name 

 Aboma is used by the Mexicans in Sinaloa as synonymous with goby.) 



a. Scales very large, 26 or 27 ; profile not very steep, tlie snout rather pointed. 



b. Sides with a jet-black lateral band ; caudal with dark cross bars ; maxillary 3 in 

 head. etheostoma, 2571. 



bb. Sides with 4 oblique dark cross bars ; a large dark spot at base of caudal ; mouth 

 larger, the maxillary 2 in head. lucretl^j, 2572. 



aa. Scales smaller, about 37; profile very steep, the snout rounded; sides with numer- 

 ous pale cross bands with darker spots. CHIQUIta, 2573. 



2571. ABOMA ETHEOSTOMA, Jordan & Starks. 



Head 34; depth 5. D. VlII-11 ; A. 10; scales 26 ; longest dorsal spine If 

 in head; eye 3; snout 4; maxillary 3. Body long and low, moderately 

 depressed and pointed forward. Scales large, ctenoid behind, none on 

 head, those on nape anct belly much reduced. Mouth moderate, terminal, 

 moderately oblique; the maxillary reaching middle of pupil; jaws sub- 

 equal, or the lower a little the longer; teeth rather strong. No flaps on 

 shoulder girdle. Cranium with a slight median crest. Interorbital ridge 

 not hollowed out; skull not abruptly widened behind. Color olivaceous, 

 side with a very broad jet-black lateral band, 3 times interrupted by sil- 

 very ; caudal white, with 4 < shaped bands, growing progressively fainter 

 behind; pectoral mottled gray, with a jet-black oblique crescent toward 

 its base surrounding a large yellow spot ; side of head with 4 round gray 

 spots separated by black, the largest below eye, with a black streak be- 

 fore it; first dorsal jet-black, second mottled, the produced spine with 

 yellowish ; ventral and anal pale. A single small specimen, li inches long, 



