2194 Bulletin 4.7, United States National Museum. 



801. PHILYPNUS, * Cuvier & Valenciennes. 



(GUAVINAS.) 



GobiomorusJ LACEPEDE, Hist. Nat. Poias., n, 699, 1798, in part (dormitor, etc.) ; restricted to 

 dormitor by JORDAN & GILBERT, Proc. U. S. Nat. Mus. 1882, 571 ; restricted to Gobiomo- 

 rus taiboa, Lacepede (Valenciennes' strigata), by GILL, Proc. U. S. Nat. Mus. 1888, 79, in 

 accordance with the law of exclusion. 



Philypnus, CUVIER & VALENCIENNES, Hist. Nat. Poiss., xn, 255, 1837 (dormitator) . 



Lembus, GiJNTHER, Cat. Fishes, I, 505, 1859 (maculatus) . 



Body elongate, terete anteriorly, compressed behind. Head elongate, 

 depressed above. Mouth large; lower jaw considerably projecting; teeth 

 in jaw rather small, slender, recurved, the outer scarcely enlarged; teeth 

 on vomer villiform, in a broad, crescent-shaped patch ; gill openings extend- 

 ing forward to below posterior angle of mouth, the isthmus very narrow. 

 Scales moderate, ctenoid, covering most of the head, 55 to 66 in a longitudi- 

 nal series. Dorsal with 6 spines and 9 or 10 rays ; anal rays I, 9 or 10 ; ven- 

 trals separate. No preopercular spine ; insertion of post-temporals almost 

 midway between occipital crest and edge of skull ; parietals Avith a crest 

 running from insertion of post-temporal forward to just behind eye, where 

 they are connected by a thin, high, transverse crest; supraocular with a 

 short, high crest, extending from above front of eye back to posterior edge 

 of orbit, thence extending outward parallel with the transverse crest, leav- 

 ing a deep groove between them ; bony projections before and behind eye 

 prominent. Vertebrae 12 + 13 = 25; lower pharyngeals triangular, with 

 slender teeth. Largest of the Gobies, some of the species reaching a 

 length of 2 or 3 feet and valued as food. Tropical rivers. ($i\.vjtvot, 

 slumber-loving; <6Ao?, loving; vitrog, sleep.) 



a. Coloration rather obscure, the dark lateral band indistinct or wanting ; scales 55 



to 57. DORMITOR, 2516. 



aa. Coloration bright, the black lateral band distinct; scales 52 to 55. LATERALIS, 2517. 



2516. PHILYPNUS DORMITOR (Lacepede). 



(SLEEPER; GUAVINA.) 



Head 2f to 2&-; depth 5 to 5f. D.VI-10; A. I, 9; scales 55 to 57; eye 

 6|to 7i in head; snout 3f ; maxillary 2f. Body elongate, terete anteri- 

 orly, compressed behind. Head elongate, depressed above. Mouth large ; 

 maxillary reaching to middle of pupil. Lower jaw considerably project- 

 ing. Teeth on jaws slender, depressible. Interspace between dorsals 

 slightly greater than interorbital width ; dorsal spines slender, the second 

 the longest, 2 in head ; length of base of anal about 2| in head ; ventrals 

 reaching of the distance to vent; tips of pectorals reaching ventral. 



* TbeEleotrince have been made the subject of a special paper (A Review of the Ameri- 

 can Eleotrulinse, in Proc. Ac. Nat. Sci. Phila. 1885, 66-80) by Eigenraann & Fordice. The 

 Gobndce of America have been discussed in detail by Jordan & Eigenmann (Proc. U. S 

 Nat. Mus. 1886, 477-518) and later by Eigenmann & Eigenmann (Proc. Cal. Ac. Sci., 2d ser.. 

 vol. 1. 1888, 51-78). In this paper are valuable notes on the specimens in the Museum of 

 Comparative Zoology. 



t For the reasons in favor of the use of the name Gobiomorus for Valenciennea. Bleeker, 

 instead of using it for the present genus, see GILL, Proc. U. S. Nat. Mus. 1888, 69. 



