26 



UNITED STATES AND MEXICAN BOUNDARY. 



The third dorsal spine is the longest and bears a filiform membranous appendage not quite 

 so much developed as in G. lyricus. The teeth are very slender, and a good deal smaller than 



in the latter species. 



List of specimens 



Catal 



No. 



iVo. of 

 spec. 



Age 



Locality. 



When collected. 



Whence obtained 



G47 



1 



Adult 



Brazos Santiago, Texas 



1854 



G. Wiirdemann . . 



Nature of 

 specimen. 



Collected by 



Alcoholic . . 



G. Wiirdemann 



3. GOBIUS CATULUS, G r d . 

 Plate XII, Figs. 9 and 10. 



Spec Char. — Body sub-fusiform. Head somewhat declivous forwards, constituting not quite the fourth of the entire length. 

 Jaws even ; gape of the mouth somewhat oblique ; posterior extremity of maxillary extending to a vertical line which would 

 intersect the pupil. Branchial isthmus very wide. Dorsal fins not contiguous ; base of the second somewhat longer than that 

 of the first. Caudal posteriorly rounded. Anal rather short and nearly as deep as the second dorsal is high ; its origin being 

 situated opposite the third or fourth ray of the latter mentioned fin and nearly even with it behind. Ventrals rather broad, 

 not extending to the vent. Pectorals broad also and rounded •, their extremities reaching a vertical line intersecting the vent. 



Scales of moderate size, longer than deep, posteriorly tapering, with numerous radiating 

 furrows. Color olivaceous brown, transversely maculated with blackish brown. 



D VI, 11 ; A 11 ; C 3, 8, 8, 3 ; Y5; P 14. 



Plate XII, fig. 9, represents Gobius catulus, size of life. Fig. 10 is one of its scales. 



List of specimens. 



Catal. 

 No. 



No. of 



spec. 



Age. 



648 



2 



Adult. 



Locality. 



St. Joseph's Island, Texas. 



When collected. 



1854 



Whence obtained. 



G. Wiirdemann . 



Nature of 

 specimen. 



Collected by 



Alcoholic . 



G. Wiirdemann . . • 



4. GOBIUS GULOSUS, Grd. 



Spec Char. — The head, which has an elongated appearance, is compressed like the body, constitutes the fourth, or 



somewhat less, of the total length. The snout is sub-conical, the mouth large and very deeply cleft, with its gape oblique, and 



the lower jaw slightly longer than the upper. The posterior extremity of the maxillary extends to a vertical line drawn 



altogether behind the entire orbit. The eyes are rather small, situated towards the upper surface of the head ; the inter-ocular 



space being about equal in width to the half of the ocular diameter, which enters nearly five times in the length of the side of 



the head. The branchial isthmus is moderately wide. The first dorsal fin is not contiguous to the second ; it is also higher ; 



two of its middle rays being filiform at their extremities ; the posterior rays of the second dorsal and those of the anal barely 



reach the insertion of the caudal, the latter stretching a little further than the former. The posterior margin of the caudal 



itself is rounded. The extremity of the ventrals extends to the vent ; the pectorals are longer still, rather broad and well 

 developed. 



The scales are of moderate development, deeper than long, with numerous radiating furrows 

 upon their posterior section. 



D VI, 15 ; A 15 ; C 4, 7, 7, 3 ; V 5 ; P 18. 



The ground color is olivaceous Drown ; the dorsal region, the upper surface and upper 

 portion of the sides of the head being maculated with black ; the spots having a tendency 



bands 



of the head. 



