254 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvii. 



prickles on head. In a recent letter, Dr. Schmidt refers the species to 

 Prionistms and doubts its distinction from P. wacellus. The latter 

 species is more slender, more rough, and lacks the cross-folds on the 

 breast. 



(Named for David Starr Jordan, president of Leland Stanford Junior 

 University.) 



11. HEMILEPIDOTUS Cuvier. 



Hemilepidotus Cuviek, Regne Aiiini., 2d ed., II, 1829, p. 165 {liemilepklotus) . 

 Temnistia Richardson, Fauna Bor.-Ainer., Ill, 1836, p. 59 {ventricosus).' 



Body with 2 broad bands of rough, scale-like plates on each side, 1 

 along- the side of the back, 1 along the lateral line, the upper bands 

 meeting anteriorl}^ in front of dorsal; scales roundish, their upper 

 and posterior margins free; skin otherwise naked, the naked skin thick 

 and firm; head naked. Villiform teeth on jaws, vomer, and palatines. 

 Top of head rugose, the ridges low, without spines, no spines on supra- 

 orbital rim. Branchiostegals 6. A small slit behind fourth gill; gill 

 membranes joined to the isthmus anteriorly but forming a rather 

 broad fold across it; preopercular spines simple, strong. Dorsal fins 

 connected, the fii'st long, with strong spines, emarginate, the first 3 

 spines shorter than those which follow; ventrals I, 4. North Pacific, 

 in shallow water. 



{j}/-U' half; XemdcoTog^ scaled.) 



II. HEMILEPIDOTUS GILBERT! Jordan and Starks, new species. 



Cottus traclmrus Pallas, Zoogr. Rosso-Asiat. , III, 1811, p 138 (larger specimen 

 brought from the Kuriles by Joseph Billings, not type, which is spotted 

 underneath, and came from "shores of America"). 



Head 2f in length without caudal; depth 3f. Dorsal III, VIII-22 

 or 23; anal 19. Band ot scales on back in 4 transverse series, in 77 

 longitudinal series. Eye 3^ in head; maxillary 2^; snout 4; inter- 

 orbital 5i. 



Bod}' rapidly tapering and verj^ slender posteriorly. Anterior pro- 

 file from first dorsal spine to eyes straight; superorbital rim produced; 

 a notch between eyes and produced premaxillarv processes; profile in 

 front of nasal spines straight and steep to tip of snout. Mouth rather 

 large, ver}' little o))lique, the maxillary reaching to posterior rim of 

 pupil; lower jaw included. Teeth in very wide bands on jaws, pala- 

 tines, and vomer; wider at front of jaws than at sides; wider on pre- 

 maxillaries than mandible; about as wide on palatines as on front of 

 mandible. Interorbital rather deeply concave, a pair of parallel 

 ridges at the middle with a channel l^etween them; width of interor- 

 bital space, two- thirds of eye. Nasal spines rather long and sharp. 

 Edge of preorbital with 4 spines; the two upper ones the largest, about 

 equal in length; the upper one directed upward and backward; the 



