178 MARINE INVERTEBRATES 
with membrane, appearing like double parapodia. The pharynx 
is very large and projected as in Nereis. 
Genus Nephthys 
N. ingens. Sometimes six inches long and one quarter of an inch 
broad; usually smaller ; color whitish, with red blood-vessel showing on 
dorsal side; appendages dark b.own; moves 
actively and burrows quickly into the mud; 
when captured often breaks off a portion of the 
posterior end, which it is able to reproduce ; 
proboscis large; branchiz between the dorsal 
and ventral parapodia. Found burrowing in 
all kinds of mud on the New England coast. 
N. picta. More slender than N. ingens ; color 
whitish, mottled with brown on the dorsal an- 
terior end; often a dark line down the back; 
head square in front and triangular in the back. 
Found in sandy mud at low-water mark. 
FAMILY EUNICIDE 
These are beautiful worms, having a red- 
: dish-brown iridescent body, with bright-red 
branching gills, which look like feathers, 
along the back. They form parchment-like 
= tubes. 
Genus Marphysa 
Nephthys ingens. Anterior part : ix] . 
of body and extended proboscis;  2L. sanguinea. Length six inches or more; 
ventral view. Enlarged. color bronze or brownish-red and iridescent ; 
has bright-red branched gills and six caudal cirri 
of different lengths ; body flattened, except at the anterior end, where it 
becomes narrow and cylindrical; has powerful jaws. It is found under 
stones and in clefts of rocks at low-water mark, or more commonly in 
parchment-like tubes on shelly beaches, from Cape Cod to New Jersey. 
Genus Diopatra 
D. cuprea. This is one of the largest and most beautiful annelids. 
It is found from Cape Cod to South Carolina at low-water mark, in sandy 
mud-flats, living in long tubes which project above the surface two or 
three inches and are hung with seaweeds and bits of foreign matter. 
Diopatra is twelve inches or more in length and one half of an inch in 
breadth. In color it is reddish-brown, specked with gray,and has a 
brilliant whitish or opal-like iridescence. The appendagesare yellowish- 
brown, specked with green. The body is flattened. From the fifth seg- 
ment long, dull to bright red, much-branched gills, resembling plumes, 
