8 Annelida Chcdtopoda 
little triiuigulur folds, which in contracted specimens en- 
croach on the posterior margin of the head. This is also 
the case with L. variabilis. 
Len2:th 10 to 20"""; diameter 2 to 4""" — some of the 
widest specimens not being more than 15""° in length, wdiile 
some of the longest are not over 3°"° in width. Number 
of segments (setigerous), 25. 
ANTINOE Knbg. 
AnTINOE parasitica 71. sp. 
PL. II, FIGS. 15-22. 
A minute form, found under the elytra of Lepidameiria 
commensalis. I have never seen a perfect specimen. Of 
the three found, two were without elytra ; the third had 
a few remaining. Number of setigerous segments, 21. 
Head (pi. II, fig. 15), divided into lobes in front by a 
deep triangular depression which is continued backward 
to the posterior margin, as a narrow, but well defined 
impressed line. The widest part of the head is about the 
middle third, where it is convex at the sides; but the 
lateral margins both in front and back of this part are 
slightly concave; dorsal surface convex. 
Anterior eyes, situated on tiie middle line, widely sepa- 
rated, black, crescentic : posterior eyes small, circular, 
about half-way between the front pair and the posterior 
margin of the head. Middle antenna lost, except basal 
article : this last occupies in part the space between the 
lobes of the head, is large, but not very long. The lateral 
antennae are without basal articles; they arise beneath the 
anterior margin of the head, and are smooth, conical, 
slightly compressed at base : their length is about half that 
of the head. Palpi, nearly twice the length of the head, 
smooth, cylindrical for their inner three-fourths, then sud- 
denly decreasing in diameter. 
