No. 5. — Clymene producta sp. nov. 1 
By Margaret Lewis. 
The worm which I am about to describe was discovered in the 
summer of 1895, at Cotuit, Mass., in a sand-flat of one of the 
tributaries of Vineyard Sound. I have found no mention of it by 
any of the writers on marine annelids and believe it has not been 
previously described. It shows so strong a similarity to members 
of the family Maldanidae, that I have no hesitancy in placing it with 
them, although, so far as I can learn, it contains a very much larger 
number of segments than any of the known Maldanids which have 
been described. 
This annelid constructs a tube of coarse sand, similar to that of 
Axiothea torquata, a species with which it was found associated. 
Its distribution, however, seems much more limited than that of A. 
torquata, as I have found it in only one locality, although I have 
examined sand-flats in many parts of Vineyard Sound. 
I have never succeeded in securing an entire, unbroken worm; 
but by putting together portions of worms and by a comparison of 
several such, I conclude that the animal consists of about seventy 
segments. I have had more than sixty segments in one piece. 
Some of my incomplete specimens measure twelve inches in length. 
This Maldanid is divided into three regions, distinguished by the 
size and shape of the segments: — first, the thorax, consisting of 
four segments, if we count as one the fused buccal and cephalic 
segments; secondly, the middle region or abdomen, consisting of 
five segments; and, thirdly, the tail, comprising the rest of the 
worm and consisting of about sixty segments. 
In the thorax the three segments following the buccal segment 
are larger at the anterior end and taper gradually toward the 
posterior end. The buccal segment is without setae ; it is obliquely 
truncated (PI. 1, Figs. 3, 4) at an angle much sharper than in 
Axiothea torquata (PI. 1, Fig. 2). In dorsal aspect (Fig. 3) it 
shows a cephalic plate with median dorsal ridge placed between two 
narrow ciliated grooves. This median ridge ends in front in a thumb- 
1 Contributions from the Zoological Laboratory of the Museum of Comparative 
Zoology at Harvard College, under the direction of E. L. Mark, No. 81. 
