840 CONTEIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
462.— TIIYRBS Goode. 
(Goode, Proc. U. S. Nat. Mus. 1880, 344: type Thyr is pellucid us Goode.) 
Body elongate, soft, and translucent. Head very short 5 mouth small, 
toothless. Eyes siuistral, close together, the lower slightly advanced. 
Pectorals of blind side smallest ; veutrals crowded together on median 
keel of body, their bases prolonged on this keel. Bays simide ; dorsal 
beginning on the snout; caudal snbsessile, almost confluent with dorsal 
and anal. Scales very thin, easily detached, jirobably cycloid. Lateral 
line well marked, straight. One species known, from deei) water. 
{Oupiq, window, from the translucent body.) 
1297 . T. peSaaicsdMS Goode. 
Colorless, tramslncent; three conspicnons dusky longitudinal lines on 
left side, the middle one faintest. Two streaks on right side; eyes 
black. Body thin, jiellncid, divided into three longitudinal tracts by 
dei)ressions at tlie'bases of the rows of interspinous processes. Scales 
small, thin, cadneons. Head very small; eyes small, protruding, tlieir 
diameter equal to the interorbital space and half the length of the 
snout; month small, formed as in the soles, the upper jaw somewhat 
hook-shaped. Dorsal fin beginning in advance of the eye, of long, 
flexible, simple, rays, the tips of which are much exserted. Pectorals 
inserted far below lateral line, that on blind side as long as orbit, the 
other as long as snout; veutrals reaching i)ast front of anal. Head 5; 
depth 3. D. 100; A. 80; P. 12 (left), 4 (right). L. 3 inches. {Goode.) 
Gulf Stream, off the coast of Ehode Island. Perluips a larva of some 
species of which the mature form is as 3 ’et unknown. 
(Goode, Proc. U. S. Nat. Mus. 1880, 344.) 
463.— rHOIVOLElVE Goode. 
(Goode, Proc. U. S. Nat. Mus. 1880, 338: type Monolene scssilicauda Goode.) 
Body thin, elongate; ey-es on the left side, very close together, near 
the ])roflle; mouth moderate, the length of the maxillary less than one- 
third that of the head; teeth minute, iu a single series, nearly equal on 
both sides; no teeth 011 vomer or palatines. Scales rather large, ctenoid 
on colored side, cycloid on blind side. Lateral line well-marked, that 
of colored side strongly and angularly curved anteriorly; that of blind 
side nearly straight. Pectoral of blind side wholly absent; dorsal 
beginning on the snout, its rays all simple. Caudal fin sessile, almost 
confluent with dorsal and anal. Ventral fins normal. Gill-rakers few, 
feeble. Vertebr® 43. Dee^i-sea fishes. {p.dvug, single; arm.) 
