# 



of the Virginian Coast. 205 



seen that in our specimens the anterior eyes are hirger ; 

 the lateral prolongations of the head, from which the 

 lateral antennfe arise, much shorter ; tlie peduncle of the 

 median auteunge not so much depressed, etc. I have col- 

 lected this species at many points from Maine to Virginia, 

 and after careful comparison am satisfied that fig. 1, re- 

 represents accurately the form of the head and append- 

 ages for our specimens. Not common. 



Lepidonotus squamatus voir, angustus. 



LepidanotiLS angustus Verr. Invert An. Vineyard Sound, etc., p. 581. 



Prof. Verrill now regards the form described by him 

 as L. angustus as a variety of JL. 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 sli£:ht enlarsre- 

 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. 



Trans, ix,] 21 



