[609] 



INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 315 



MALDANE ELONOATA Yerrill, sp. nov. (p. 343.) 



Body large and mucli elongated, cylindrical, obliquely truncated at 

 both ends ; with nineteen setigerous segments, those of the middle region 

 elongated ; head depressed, with its dorsal surface very oblique ; median 

 lobe low, convex, obtusely rounded in front ; lateral marginal lobes, or 

 folds, low, rounded, thickened, separated by a shallow emargination 

 from the posterior transverse fold, which is also thickened, little elevated, 

 and divided into two parts by a slight sulcus ; from the notch between 

 the lateral and posterior lobes of the head, a lateral oblique sulcus 

 curves downward and backward, and joins the first of the two trans 

 verse sulci, which are strongly marked on the ventral side of the buccal 

 segment. Anterior setigerous segments strongly biannulated ; the first 

 two are short, the length about equal to the diameter; the next two 

 are considerably longer ; and those farther back become very much 

 elongated ; the last setigerous segment is short. The segments are 

 considerably swollen where the setse arise, especially in the middle 

 region. The upper setae are long and slender, mostly about half the 

 diameter of the body, and form rather large fascicles on most of the 

 segments. The last segment is obliquely truncated, its posterior border 

 surrounding the base of the large anal process, which is obliquely placed, 

 foliaceous, obovate, with the posterior edge broadly rounded, the upper 

 surface concave, and the margin entire. Color dark umber-brown, or 

 reddish brown, iridescent ; the swollen parts of the rings are lighter 

 yellowish brown, or grayish brown, the dark red blood-vessels often 

 showing through ; near the bases of the setse there are usually small 

 dark colored specks ; head and buccal lobe thickly specked with dark 

 brown or blackish. 



Length of largest specimens, 300 mm ; diameter, 4 mm to 5 mm ; more fre 

 quently about half this size. 



Savin Rock, near New Haven ; in sandy mud at low- water mark, form 

 ing thick tubes composed of fine mud. 



EHODINE ATTENUATA Yen-ill, sp. nov. (p. 508.) 



Body slender, elongated, with the segments strongly marked, and the 

 first setigerous segment very long. Head elongated, depressed, ob 

 tusely rounded in front; median lobe, or ridge, broad and but little 

 elevated, except near the front of the head, where it becomes suddenly 

 narrowed, more convex, with well marked foveae on each side ; lateral 

 lobes rudimentary, scarcely apparent ; on the posterior part of the head 

 there is a prominent transverse elevation. Buccal lobe confluent with 

 the cephalic. First setigerous segment swollen anteriorly and about 

 as broad as the head at its anterior end where the setae arise, but nar 

 rowed and gradually attenuated backward, its total length being about 

 eight times its diameter ; second and third setigerous segments about 

 equal, nearly twice as long as broad, swollen in the middle, the front 

 margin of each prolonged into a sheath-like collar; the three next 

 22 v 



