of (lie Virginian Coaf^f. 5 
seen that in our specimens the anterior eyes are larger ; 
the lateral prolongations of the head, from which the 
lateral anteniise arise, much shorter ; the peduncle of the 
median antennae not so mucli depressed, etc. I have col- 
lected this species at many points from Maine to Virginia, 
and after caieful comparison am satisfied that fig. 1, re- 
represents accurately the form of the head and append- 
ages for our specimens. Not common. 
Lepidonotus squamatus var. anqustus. 
Lf.pidonotus angustus Verr. Invert An. Vineyard Sound, etc., p. 581. 
Prof. Verrill now regards the form descrihed by him 
as L. angustus as a variety of L. squamatus. 
Common on shells, etc., from low water to 10 fathoms. 
Lepidonotus variabilis n. sp. 
PL. I, FIGS. 6-11. PL. II, FIGS. 12-14. 
Body narrow, of nearly uniform width throughout ; 
slightly convex above and below. The head (pi. I, f. 6) 
is convex laterally, with a well marked depression run- 
ning from the base of the middle antenna, nearly to the 
posterior margin. Eyes, lateral, circular ; the anterior pair 
a little back of the centre, slightly larger than the poste- 
rior pair. Middle antenna about double the length of the 
lateral, nearly three times as long as the head, somewhat 
swollen at its outer third, then tapering rapidly to a fili- 
form termination. Lateral antennae with a slight enlarge- 
ment midway, otherwise similar to middle antenna. 
Palpi, a little shorter than middle antenna, swollen at 
base, diminishing rapidly and uniformly. 
The tentacular cirri have elongated basal articles; the 
inferior are about the length of the lateral antennae ; the 
superior a little longer. In structure they are the same 
as the middle antenna. 
2 
