Some Notes on Aleippe lampas (Hanc.). 187 
indistinct as far as the body is attached to the disk. This may be 
all the second thoracic segment or may be a number of them 
(Fig. 8 11). 
Two portions follow which are fairly marked off and constant 
in this. In order not to imply a statement as to the actual number 
of thoracic segments I should like to call the first of these free 
segments the first post-discal segment (Fig. 8 7) the other the 
second post-discal segment (2). 
The 3d and 4th post-discal segments are still not very distinct 
“but can usually be made out with sufficient clearness. The 5th and 
6th are always distinct and very well marked off. All these seg- 
ments have no appendages (Fig. 8 3—6). 
The last segments of the body were first determined by Darwin 
and then fully worked out by Berxpr. I find in accordance with 
these two authors that in the adult the second pair of cirri (c2) is 
placed on a little elevation which would be post-discal segment 7. 
This segment contains two little chitinous plates (shaded at 7 in 
Fig. 8) or one base plate for each cirrus. Crowded in dorsad from 
the second cirri but not less distinct are four a little larger base 
plates for the 3d pair of cirri, two lateral and two ventral ones. 
(Fig. 8 8, the right lateral and the right ventral one is shown.) They 
represent segment 8. Finally dorsad from these are two small ones 
(the right one only is shown at 9) and on these the last cirri (c4) 
are articulated: they represent the 9th post-discal segment. These 
pairs of plates can be made out distinctly in many cases. They 
take certain stains: they come out with carmine sometimes, esp. 
paracarmine, and show well with gentian violet. 
The two pairs c2 and «3 bear the often described “cushions” 
on the distal ends of their second joints. What these are for, only 
further study can reveal. The theories about them seem not con- 
vincing. BERNDT'S fig. 3 and 4 make the reproduction of my sketch 
of them unnecessary, but it shows me as well as his drawings that 
the “cushions” cannot be the reduced interior rami of these cirri. 
The peculiar arrangement of the bristles on these cirri comes out 
in the sketch of them in Fig. 8. Special care was given to bring 
out the distribution of the different kinds of bristles and hooked 
hairs. At the distal end of the last joint I find distinctly (even in 
the adult) three claw-like hooks. 
