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placed, at the basis broad, shorter or longer lobe which 
I will name the dorsal lobe (Tab. I. fig..11, d); this 
bears on the lower margin the remarkable formation 
which repeatedly has been described by anatomists, and 
which I shall name the setal plate(1). Below on each 
side issues a lobe turning forwards and downwards, 
the basis of which almost meets at the top with the 
lower basis of the dorsal lobe; these 2 ventrally situated 
lobes I shall call the lateral lobes (v). 
Each lateral lobe carries, besides several common 
hairs, 1 thick, long, plumose seta which I shall name 
the plumose seta (s). 
In Galeodes (orientalis and several other species) 
the tolerably long dorsal lobe projects somewhat in 
front of the lateral lobes (fig. 11); the setal plate is 
very high, the foremost, lowest end projects in a 
rather long, triangular apex, and its anterior margin 
is very concave, and very well defined from the 
upper margin. The plumose sete extend to the extreme 
apex of the setal plate. 
In Datames geniculatus? the rostrum has a similar 
form, the dorsal lobe is shorter and the lateral lobes 
longer, the 8 lobes accordingly stretching equally far. 
The anterior margin of the setal plate is still more con- 
cave than in Galeodes, but the lower apex is some- 
what shorter, and the plumose sete reach far in front 
of this apex. 
In Zombis sp. I have found a rostrum similar to 
that in Datames; the lateral lobes are, however, a little 
shorter, and the plumose setz reach but a little outside 
the apex of the setal plate. 
In Solpuga (fatalis and several other species) the 
dorsal lobe is a little shorter than the lateral lobes, 
the setal plate rather lower than in Galeodes, with a 
slightly concave anterior margin (almost as in 
