194, W. BLAXLAND BENHAM, 
Still further, in one specimen, whilst the chet of the 
dorsal bundles of Segment x111 were as usual palmate, those 
of Segment x11 were furcate. 
Seeing that in Psammoryctes and in Tubifex we get 
certain cheetz which are neither simple crotchets nor com- 
pletely palmate (see Vejdovsky’s figs. 11 and 4, pl. viii), I 
looked carefully for similar intermediate forms in Hetero- 
cheta, and for a long time I looked in vain, but ultimately 
I was successful in finding somewhat similar “ intermediate” 
or “ multidentate” cheetz, The one figured (fig. 15) was from 
one of the dorsal bundles of Segment xrv of one specimen; it 
occurred with three typical palmate forms, and there were no 
crotchets. Curiously enough it was not at the side of a bundle, 
but between the 2nd and 8rd palmate chete. These “inter- 
mediate” chete have one or two teeth between the prongs. 
One specimen I noted, and here represent (fig. 16), in which 
a great amount of divergence from the typical arrangement 
was accompanied by intermediate conditions of the chete. 
This may be tabulated thus: 
Abnormal Specimen. 
Segment. Right Dorsal Bundle. Left Dorsal Bundle. 
Il. 3 fureates . : : . 98 furcates. 
IL f 1 furcate (most dorsal of bundle) bs fanoatast 
2 intermediates 
2 furcates. 
c large palmate. 
2 small palmates. 
V. 5 (+ 1) palmates : 5 - 5 (+ 1) palmates. 
VI to XIII (inclusive) were normal. 
IV. f 1 furcate (dorsal) : ; : 
3 intermediates . ‘ : : 
Dorsal Chete. 
Segment, Right. 
XIV. 3 palmates. 
XV. 1 fureate and 1 intermediate. 
XVI. 1 palmate and 1 furcate. 
XVII, &e. 2 furcates. 
The palmate chete are usually considered as special modi- 
