PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 49 
of New York. They are in the condition of natural casts in fine-grained 
sandstone, but I have quite satisfactorily identified a dorsal valve of 
Stricklandinia saltert and one of S. davidsoni Billings. If these two spe- 
cies are correctly identified, as they appear to be, their discovery in 
Georgia is especially interesting, because they have hitherto been found 
only in strata of the island of Anticosti; and also of the indication which 
they and their associates in the two regions named afiord as to the 
equivalency of the Georgia, Clinton, Anticosti strata in America; and 
Upper Llandovery strata of Great Britain. 
WASHINGTON, D. C., February 15, 1880. 
DESCRIPTION OF ANEW FLOUNDER (PLEURONICHTHYS VERTSI- 
CALIS), FROM THE COAST OF CALIFCRNIA, WITH NOTES OWN 
OTHER SPECIES. 
By DAVID S. JORDAN and CHARLES H. GILBERT. 
Pleuronichthys verticalis sp. nov. 
Form broad ovate, the outlines regular; head small, somewhat con- 
stricted behind the upper eye; eyes large, but smaller than in P. 
quadrituberculatus. Interorbital ridge narrow; a small tubercle or 
prominence in front of the upper eye; a large one in front of upper 
edge of lower; another larger and sharper at interior edge of the in- 
terocular space; another at the posterior edge of the interocular spine 
ridge. This latter is developed into a long, sharp, triangular spine, 
which is nearly as long as the pupil, and is directed backwards. A 
prominent tubercle at the posterior lower angle of the upper eye. Upper 
edge of opercle somewhat uneven, but no other tubercles present. 
Mouth small, as in other species; the lips thick, with lengthwise 
plice. 
Teeth in a broad band on the left (blind) side of each jaw ; no teeth 
on the right side in either jaw. Gill-rakers very small, weak, and flex- 
ible, about ten in number. Scales essentially as in the other species, 
small, cycloid, imbedded, and scarcely imbricated. Lateral line nearly 
straight, with an accessory branch which extends to the middle of the 
dorsal fin. 
Dorsal fin beginning on the blind side at the level of the premaxillary, 
there being but about four of its rays on the left side of the median line. 
Vertical fins less elevated than in the other species, the longest rays of 
the dorsal about half the length of the head. Anal fin preceded by a 
spine. Caudal peduncle short and deep. Caudal fin elongate, rounded 
behind. Pectoral short, nearly equal. Ventrals moderate, reaching 
anal spine. 
Fin rays: D. 65; A. 45. 
Color dark olive-brown, with round grayish spots, the body and fins 
mottled with blackish. 
Proc. Nat. Mus. 80-———4 May 6, 1880. 
