of the Virginian Coast. 27 
Number of segments, from 24 to 30. Length, 3 to 4""". 
Greatest diameter, 1°"". 
Specimens of the mature female occurred through July 
and August. They are quite delicate, and were very 
uneasy, swimming about constantly and rapidly, with a 
quick, uudulatory motion. All the features mentioned 
above seem to originate after separation has taken place. 
I often found the stem form with eggs giving the charac- 
teristic purple color in the posterior segments, and with 
the separation carried so far that the slightest touch served 
to complete it, but in only one case did I find antennas or 
tentacular cirri formed, or the peculiar outline of the head 
indicated, before separation. In this one specimen the 
antennae and tentacular cirri were mere buds, the first 
segment was without feet ; but the eyes and capillary setae 
had not appeared. 
Male. No adult male was found. The posterior seg- 
ments of the stem often contained very fine granular mat- 
ter, which I believe was the male element; it gave a very 
bright orange color to the segments in which it was found. 
No other change had taken place in these segments, though 
the division was often nearly complete, as mentioned above 
in the case of the female. 
This species was common on shells, etc. Dredged, 4 to 
12 fathoms. 
Procbr^a {Ehlers) Marenzeller. 
EHiiKRS. Borstenwurmer, p. 256. 
Marenzeller. Zur Kentniss der adriatischen Anneliden, zweiter Bei- 
trag, p. 37. 
For remarks on this genus see under Autolytus. 
Progeria tardiqrada n. sp. 
Head, quite thick, transversely oval, convex ; head and 
palpi together nearly circular ; palpi much the same as 
