ZOOLOGY. 355 



own spine being slender, serrated upon its edges, and extending beyond the tips of the ossa innominata. Posterior margin of 

 caudal slightly emarginatei. 



Stn. — GasteTOiUus pitgctlii, Grd rroc. Acad. Nat. Sc. Philad. VIII, 1856, 135. — Ib. Gen. Eep. Fishes, 92. 



Vast numbers of slicMebacks are found in the shallow fresh-water streams near Fort Steilacoom. 

 During severe droughts, some of the small brooks in that vicinit}' becoming dried up, multitudes 

 of these little fish are found dead on the surface of the mud so recently submerged. Individuals 

 of the species rarely exceed an inch and a quarter in length. 



AMBLODON GRUNNIENS, Rafin. 

 Buifalo Perch; Grunting Perch, .fee. 



Plate XXIII. 



Sp. Ch. — Profile' of the head depressed on the nape. Snout thick, blunt, and short. Posterior extremity of maxillary 

 extending to a vertical line intersecting the anterior rim of the pupil. Extremities of pectorals almost even with the tips of 

 ventrals, or else projecting slightly beyond them. First anal spine diminutive; second one stout and well developed. Caudal 

 fin posteriorly convex. Color bluish-gray, lighter beneath than above. Fins grayish-olive, and maculated. 



Stn. — Amblodon grunniens, Rafin. Ichthyol. Ohiens, 1S20, 24. — Gikakd, Gen. Eep. Fishes, 96. 



Sciacna oscula, Lesu. in Journ. Acad. Nat. Sc. Philad. II, 1822, 252 ; plate xiii. — Kiktl. Rep. Zool. Ohio, 



168, 192. 

 Sciama grisea, Leso. in Journ. Acad. Nat. Sc. Philad. II, 1822, 254. 

 Corvina oscula, Cdv. & Val. Hist. Nat. des Poiss, V, 1830, 98.— Richaeds. Faun. Bor. A mer. Ill, 1836, 68.— 



DkKat, New Y. Faun. IV, 1842, 73 ; platj xxi, fig. G3.— Stoeeb, Synops. 1846, 67. 

 Corvina grisea, DkKat, New Y. Faun. IV, 1842,76. 

 White perch of Ike Ohio, lake sheepshet.d, buffalo perch, grunting perch, S^'c , Vekxacular. 



A single individual was obtained from Milk river, Nebraska. No notes were made of its 

 habits. 



GUNNELLUS ORNATUS, Grd. 

 Banded Mud-fish. 



Plate XXY h, Figs. G and 7. 



Gunnellus omatus, Grd. in Proc. Acad. Nat. Sc. Philad. VII, 1854,149 Idid. Gen. Eep. Fishes, p. 116. 



Sr. Cn. — Dorsal and anal fins contiguous to the caudal. Anal spines, two. Ventrals reduced to two exceedingly small 

 spines. Head quite small. An occipito-ocular dark vitta continued vertically beneath the orbit to the hyoid apparatus. 

 Ground color yellowish; about thirteen dorsal roundish spots of blackish brown, and about eighteen lateral subquadrate ones 

 of light brown. 



_This little fish may be generally found at low tide on oyster-beds and shoals, and seem to be 

 almost amphibious. When alive they are of a dark grayish color, with transverse bars and 

 mottlings of a dark olive. They are resident in the bays at all seasons, and those collected are 

 among the largest I have seen, their length not exceeding three inches. — C. 

 Several were obtained from the bays of Puget Sound, near Fort Steilacoom. 



CEBIDICHTHYS YIOLACEUS, Grd, 

 Tiolet Monkey-fish. 



Plate XXY h, Figs. 4 and 5. 



Sp. Ch. — Upper surface of head narrow, declivous laterally. A fleshy crest along the cranial ridge. Mouth large; posterio. 

 extremity of maxillaries exteniling to a line drawn across the posterior rim of the orbit. Origin of anal fin situated opposite 



