GALEICHTHYS.—ARIUS. 125 
cod 
Here described from eight specimens, 220 to 330 mm. in total length, including 
the type of the ‘species and co-types of G. gilberti and G. eigenmanni. 
12. Galeichthys longicephalus. | 
Galeichthys dasycephalus (non Giinth.), Jord. & Everm, Bull. U.S. Nat. Mus. xlvii. 1900, p. 2780'; 
Gilb. & Starks, Mem. Calif. Ac. Sci. iv. 1904, p. 25. 
Galeichthys longicephalus (Eigenm. & Eigenm.), Jord. & Everm. t. c. p. 2781°; Gilb. & Starks, 
le.*. 
Depth of body 53 in the length, length of head 4. Breadth of head 14 in its length, diameter of eye 62. 
Fontane] produced into a groove which reaches the parieto-occipital ; occipital process strongly keeled, 
as long as broad, with truncated apex and slightly concave sides. Width of mouth 4 the width of head; 
premaxillary band of teeth 4 times as long as broad; vomerine patches of teeth small, well separated, 
continuous with the rather small oblong or oval palatine patches. Maxillary barbel extending to the 
basal part of the pectoral. 6 gill-rakers on the lower part of the anterior arch. Dorsal 17; spine 4 
the length of head ; adipose fin a little longer than the dorsal. Anal 19. Pectoral spine 3 the length 
of head, with the inner edge weakly serrated. 
Hab. Panama (Jordan }23 4), 
Here described from a specimen of 250 mm. 
13. Galeichthys peruvianus, ___ | 
Galeichthys peruvianus, Liitk. Vid., Medd. 1874, p. 205°; Steimd. Sitzungsb. Ak. Wien, Ixxii. 
1876, p. 5847; Eigenm. & Eigenm. Occ. Papers Calif. Ac. Sci. i, 1890, p. 51°; Jord. & 
Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 122 « oe 
Apparently allied to the preceding species, which it resembles in the arrangement of the teeth on the palate, 
but well distinguished by the longer occipital process, the narrower premaxillary band of teeth (8 times 
as long as broad), and the shorter anal fin, with 14 to 16 rays: 8 
Hab. Pacific Coast from Mexico to Peru: 
Altata in Sinaloa?; Panama?; Callao !?°, 
3. ARIUS, Cuv. & Val., 1840. 
Arius (part.), Cuv. & Val. Hist. Nat. Poiss. xv. p. 52 (1840) ; Giinth. Cat. Fish. v. p. 174 (1864). 
Tachysurus*, Eigenm. & Eigenm. Occ. Papers Calif. Ac. Sci. i. 1890, p.42; Jord. & Everm. Bull. 
U.S. Nat. Mus. xlviil. 1900, p. 2782. 
Cathorops (Jord. & Gilb.), Jord. & Everm. t. c. 1896, p. 138. 
Like Galeichthys, from which it differs only in having the teeth on the palate 
evanular or obtusely conical instead of villiform, this genus comprises a considerable 
number of species from the coasts of tropical and subtropical countries, most of which 
enter fresh water. 
* Lacepéde (Hist. Nat. Poiss. v. p. 151, 1803) founded the genus Tachysurus on a Chinese painting of a 
fresh-water fish which may have belonged to Galeichthys or Arius or may not have been at all closely related 
to them. ‘The generic diagnosis consists of (1) characters which are common to Arius, Pimelodus, and other 
genera, and of (2) others which might certainly be held to define the genus Tachysurus if they could be relied 
