615] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 32 1 



arising from the summit of the stout and rather long pedicels.* There 

 rare usually five or more main divisions in good-sized specimens , these 

 spread outward from one point, are recurved at the ends, and ilex nous 

 and bipinnately branched, the lower pinna} being longest each time, 

 and the ultimate divisions very numerous, fine, slender, and acute. 

 The branchiae of the posterior pair, in normal specimens, are consider- 

 ably s'maller, with the divisions less numerous, and the ramuli longer 

 and more delicate. The pedicels of the anterior branchiae are about as 

 :iong as the diameter of the body, and are very contractile, as well as the 

 branches, so that the gills can be contracted into a small compass and 

 withdrawn under the dorsal collar, beneath which the pedicels arise. 

 This branchial collar is formed by the prolongation of the margin of the 

 -third segment; on each side "of the median line above, it is divided into 

 two narrow, lanceolate processes directed for ward ; exterior to these there 

 are two other wider and usually less prominent angles or lobes ; laterally, 

 the collar is prominent, with a broadly rounded, thin margin, which 

 forms another angle on each side beneath; on the ventral side its edge 

 recedes and is but little raised. The tentacular collar, formed by the 

 second segment, expands into a broad, rounded, prominent lobe on each 

 side; and on the ventral surface becomes narrower, though still promi- 

 nent, and recedes in a broad, rounded sinus behind the posterior lobe 

 of the mouth. The cephalic segment is bordered by a rather broad 

 frontal membrane, emarginate above, and broadly rounded laterally. 

 Tentacles very numerous, long, and slender. Color, light red, brownish 

 red to dark reddish brown ; the annulations often darker ; the upper 

 surface is usually more or less specked with flake- white ; along each 

 side, below, there is usually a row of squarish spots, brighter red than 

 the rest of the body, each pair connected by a narrow, transverse line 

 of red between the ventral shields, which are dull yellowish red; the 

 segments along the sides are often bordered with red ; branchiaa usually 

 green, specked on the outer sides of the branches with flake- white, and 

 with internal blood-red vessels, showing distinctly in all the divisions ; 

 the pedicel is usually bright red; tentacles, flesh -color. 

 Length up to 70 mm ; diameter, 3 mm . 



Great Egg Harbor to New Haven and Vineyard Sound ; low- water 

 mark to one fathom. 



LEPR^EA RUBRA Yerrill, sp. nov. (p. 382.) 



Body elongated, somewhat swollen anteriorly, rapidly tapering to the 

 very long, slender, posterior portion. All the segments posterior to the 

 branchia3 bear small fascicles of slender setaa, as well as uncini ; pos- 

 terior to the twenty-fifth setigerous segment the uncigerous feet become 



* In mentioning this species, on page 321, it was stated that it has but three gills , 

 and, in fact, this is the most frequent number. Among the numerous examples exam- 

 ined, I have only recently found a specimen with both pairs of gills in their normal 

 condition. 



