[605] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETc. 311 
on the dorsal surface; a-row of elongated dark spots on each side be- 
tween the fascicles of sete; the setze dark gray. 
Length, 75™™; diameter, 3™™. 
Off Buzzard’s Bay, in 25 fathoms, mud; Bay of Fundy, 10 to 90 
fathoms, mud; near Saint George’s Bank, 110 and 150 fathoms, mud. 
SCALIBREGMA BREVICAUDA Verrill, sp. nov. (p. 416.) 
Body rather short, with a narrow, tapering anterior portion ; a swollen 
middle region; and a narrow, tapering caudal portion; lower surface 
with a very narrow, smooth median area, divided transversely into a 
series of small rounded prominences by slight depressions. Head small, 
transverse, truncate or slightly concave in front, the angles produced 
and prominent. On the anterior region four segments bear short, tufted 
branchis, close to the base of the upper fascicles of sete, which are 
rather long and slender; each of these segments also has a dorsal] 
transverse row of rather large and conspicuous blackish granules on its 
posterior margin, and also a black spot on the sides below the branchie. 
The surface of all the anterior segments is regularly and rather finely 
granulous, the granules in transverse rows. The middle region, com- 
posed of about ten segments, is thicker, and sometimes much swollen, 
and the feet are represented only by small fascicles of slender sete. 
The caudal region is less than one-half the entire length in preserved 
specimens, and is rather slender and tapering, composed of about sixteen 
segments; the rami of the feet consist of a prominent, obtuse papilla, 
both above and below, with a blackish spot at the end, and bearing a 
fascicle of slender sete, in length rather exceeding half the diameter of 
this part of the body. Color, when living, dark brownish red, tinged 
with yellow at both ends. 
Length, 32™; diameter, 2.5™™, 
Off New Haven, 4 to 6 fathoms, shelly bottom. 
TROPHONIA AFFINIS Verrill. Pl. XIV, fig. 75. (p. 507.) 
Siphonostomum affine Leidy, op. cit., p. 16 (148), 1855. 
Body rather slender and elongated for the genus; skin irregularly 
rugose, granulous, anteriorly covered with small papille. The eight 
branchie are cylindrical, thick, blunt, unequal; two tentacles stouter 
than the branchie, suleate beneath. On the four anterior segments the 
upper and lower fascicles of sete are. much elongated and directed for- 
ward. On the fifth and following segments those in the upper fascicles 
are capillary, divergent, six to ten in each fascicle ; in the lower fascicles 
there are about three stout, slightly curved, acute, deep yellow sete. 
On the third and fourth segments the sete of the upper fascicles are 
longer and larger than those in the lower ones; posteriorly the lower 
sete become longer, stouter, and more curved at the tip, the lowest one. 
becoming hook-like. 
. Length, 60" ; diameter, 3.5™™, 
