26 Annelida CJwetopoda 
ridum has been examined by any one since it was described 
by Claparede. The extent of the projecting portion of the 
palpi is somewhat variable, l)ut if in Claparede's figure 
(pi. 14, fig. 1), a curved line be drawn, passing just in front 
of the origin of the lateral antennae, terminating on either 
side opposite the anterior (minute) eye on that side, the 
usual condition will be represented. Add, that though 
the antennae often are as given by Claparede, in some spe- 
cimens, the central antenna is longer than the lateral, some- 
times as long as the first dorsal cirrus ; also, that while 
both kinds of anal cirri (Clpd. 1. c, pi. 14, f. i a) occur, I 
have never seen both on the same specimen. 
Sexual J^'orms. 
Female differs from the stem form in the following 
points : the head is very short, length to breadth as 1 to 2^ ; 
middle third of anterior margin curving sharply back- 
ward, the autero-lateral portions appearing as rounded 
projecting lobes. 
Antennae, both median and lateral, arise from the an- 
terior margin of the head ; they are equal in length, being 
much shorter than those of the stem form. 
Anterior eyes very large, posterior pair a little within 
the anterior, but nearly touching them. The anterior 
minute eye-specks of the stem form not seen. 
The tentacular cirri, and dorsal cirri of the first segment, 
bear the same relation to the antennae as in the stem form. 
The capillary setae are very long, beginning on the 4th, 
5th, or 6th segment; not found on the last 4 to 7. Feet 
much swollen at base. 
Eggs, very large, generally crowded, and then irregu- 
larly polygonal, otherwise spherical, their diameter about 
one-half the width of the body; of a dark purple color, 
with an eccentric clear nucleus. 
Color of the body determined by the eggs, wherever 
they exist ; elsewhere the same as in the stem form. 
