CYAMUS CETI. 87 
the former, to M. Milne Edwards, who, however, rejects 
the Linnean specific name Ceti. ‘The animal represented 
by the former (Plate 58, fig. 2) from Talcahuna, in the Paris 
Museum, appears to be a male, being much more slender 
than the specimens represented by Savigny, and in our 
woodeut. The head is oval, its hinder portion being 
connate with the first segment of the body, of which the 
central portion is much shortened, the sides swelling 
into rounded lobes. The upper antennz (b) are about 
twice the length of the head; the first, second, and third 
joints of nearly equal length; the first being the thickest 
and somewhat triquetrous, the terminal joint is minute 
and conical. The lower antenne (c) are very minute and 
slender, not being more than one-third of the length of 
the basal joint of the superior, with four joints, the third 
being the longest, and the fourth very minute. The 
upper lip (*), copied from Savigny, is rounded at the 
base and slightly emarginate in the middle of its fore 
margin, whilst the tongue (**) is somewhat four-lobed, 
or rather it is deeply incised in the middle of its fore 
margin, and is furnished in the centre with a narrow 
bipartite projection, shorter than the lateral lobes. 
The mandibles (d) are somewhat triangular, destitute of 
a palpiform appendage, but furnished with a separate 
denticulated tooth below the extremity, which is similar 
in character: the first and second maxille are affixed on 
the same plane (as in the Myriapoda, although not sol- 
dered into one piece as in that order): the first pair (e) 
are large and flattened, apparently three-jointed and des- 
titute of palpi, the terminal joint being large, rounded 
at the outside of its extremity, with several hairs forming 
a brush in the middle of the convex side; the second pair 
of maxille (f) are minute, and apparently three-jointed, 
the second and third joints being very minute; they are 
