NATURAL SCIENCES Of PHILADELPHIA. 265 



Branchiostegal rays five. 



Anal papilla moderate, oblong, and compressed. 



Dorsal fins entirely separated ; the anterior considerably behind the pecto- 

 ral region, convex, and with seven or eight spines. The second oblong 

 (I. 12); with its rays mostly simply bifurcated, and with the last free behind. 



Anal fin shorter than the second dorsal, but even with it behind, and with 

 its structure similar. 



Caudal fin well developed, convex behind, and with numerous supplement- 

 ary rays above and below its peduncle. 



Pectoral fins wide, produced and rounded behind, with the base nearly 

 vertical, but slightly concave, not extending below to the plane of the breast. 

 The upper rays, like the others, are well defined and branched. 



Ventral fins inserted below the bases of the pectoral, simply infundibuli- 

 form, with the inner rays longest and connected, and with the interspinoun 

 membrane low. 



The genus Eucyclogobius is very distinct from Lepidogobius, differing espe- 

 cially in the robust, subfusiform body, the size and position of the eyes, wider 

 forehead, shape of jaws, and especially the position of the ventral fins. Only 

 one 3pecies is yet known. 



EocYCLOGOEins Nkwberrii Gill. 

 Synonymy. 



Oooius Newberrii Girard, Proc. Academy of Natural Sciences of Phila., vol. 



viii. p. 128, 1856. Girard, Boston Journal of Natural History, vol. vi. 



p. 539. PL xxv, figs. 5 8, 1857. Girard, Explorations and Surveys for 



a Railroad Route, vol. x. Fishes, p. 128. 

 Lepidogobius (Newberrii) Gill, Annals of the Lyceum of Natural History of 



New York, vol. vii. p. 14, 1858. 

 Gobius Newberrii Giinther, Catalogue of the Acanthopterygian Fishes, Ac., 



vol. iii. p. 77, 1861. 

 KucyclogobiuB (Newberrii) Gill, Proc. Academy of Natural Sciences of Phila.. 



1862, p. 279. 

 Kucyclogobius Newberrii Gill, op. cit., 1862, p. 330. 



Genus LEPIDOGOBIUS Gill. 

 Synonymy. 



Lepidogobius Gill, Annals of the Lyceum of Natural History of New York, 



vol. viii. p. 14, 1859. 



Cyclogobius Stemdachner, Beitriige zur Kentniss der Gobioideu in Sitzungsbe- 



richte der kaiserlichen Akademie der Wissenschaften, Math. Nat. 



Classe., Band xlii. p. 284, 1861. 



Lepidogobins Gill, Proc. Academy of Natural Sciences of Phila., 1862, p. 330. 



Gobius Girard, Explorations and Surveys for a Railroad Route, &c, to the 



Pacific Ocean, vol. x.. Fishes, p. 127. 

 Gobius sp. Gilnther. 



Body elongated, slender, compressed, with the anus in advance of the mid- 

 dle of the total length ; behind very slowly decreasing in height towards the 

 (vandal peduncle, which is elongated, but scarcely narrowed at the middle. 



Scales regularly imbricated, small, cycloid, ovoid, subtruncated in front. 

 with the nucleus in the anterior half, and with numerous radiating striae di- 

 verging towards the front and with concentric striae behind ; scales ad- 

 vancing forward above as far as the eyes, and on the sides to the suborbital 

 region. 



Head elongated, conoid, subquadrangular behind, and there about equally 

 high and wide ; above transversely convex, with the nape undefined, the scales 

 advancing to the eyes ; the opercula sub vertical ; cheeks not tumid, scaly 



1868.] 10 



