328 
BULLETIN OF THE BUKEAU OF FISHERIES 
erately large, the membranes rather narrowly attached to the isthmus; scales quite large, ctenoid, 
lost on anterior part of body in the specimen in hand, therefore making the number counted for a 
lateral series uncertain; dorsal fins well separated, the first consisting of very slender, flexible spines; 
second dorsal and anal similar and opposite each other and separated from the caudal by a dis- 
tance equal to the greatest depth of the body; caudal fin somewhat pointed, 3.5 in length of body; 
ventral fins probably united (the membrane apparently is broken in the specimen in hand, the 
fins however, being still connected at base; a cross fold of skin, forming a part of the sucking disk, 
is quite evident), reaching about two-thirds the distance from their bases to origin of anal, 1.25 in 
head; pectoral fins moderately large, the middle rays longest, about as long as head. 
Color in alcohol brownish above, somewhat paler underneath; sides with irregular, large, 
brown blotches, darker than the ground color; base of caudal with two quadrate black spots, one 
on the upper half of the base and the other on the lower half; the fins otherwise slightly dusky to 
colorless. 
I I 
I CM 
a 
Fig. 197. — Mugilostovia gobio gen. et. sp. nov. From the type, 27 millimeters long. a. Ventral surface of head, showing mulletlike 
mouth 
A single specimen of this singular fish, 27 millimeters (1^ inches) in length, is at hand. It 
seems to differ from all other gobies known from American waters in the thin, triangular lower jaw, 
which is shaped and formed as in the mullets (Mugil). The teeth differ from all other gobies of 
Chesapeake Bay in being set in a single series on the outer edge of the lower jaw and in being movable. 
Chesapeake localities — Brackish marsh, connected with Lynnhaven Bay, Va., by a creek; taken 
in a small collecting seine in company with Fundulus ocellaris, September 26, 1921. 
Order DISCOCEPHALI 
Famiiy LXXXI. — ECHENEIDIDiE. The remoras 
Body elongate or slender; head depressed above, with a large oval disk consisting of crosswise 
partitions or laminae and a single lengthwise septum; lower jaw projecting beyond upper; mouth 
wide; teeth villiform, present on jaws, vomer, palatines, and usually on tongue; gill arches 4; gill 
membranes free from the isthmus; branchiostegals 7; scales minute, cycloid; air bladder wanting; 
dorsal and anal fins long and low; ventral fins thoracic; pectoral fins placed high. 
142. Genus ECHENEIS Linnaeus. Remoras; Shark suckers 
Body slender, fusiform, disk long, with 20 to 28 laminae; soft dorsal with numerous short rays; 
anal similar, the anterior rays somewhat elongate; caudal slightly concave behind; ventrals long, 
the inner rays narrowly adnate to abdomen; pectorals pointed, the rays soft and flexible. 
