618 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



Sabella microphthalma Yerrill, sp. no v. (p. 323.) 



Body rather short and stout, narrowed slightly anteriorly, tapering rap- 

 idly close to the posterior end, composed of about sixty segment, de- 

 pressed, moderately convex above, flat below, especially when preserved 

 in alcohol ; anterior region composed of eight setigerous segments, hav- 

 ing moderately long fascicles of setse ; posterior region composed of about 

 fifty short segments, bearing very small fascicles of setae ; anal segment 

 small, simple, with two very small ocelli-like spots ; ventral shields of 

 the anterior segments short, transversely narrow, oblong ; median sulcus 

 very distinct in the posterior region, dividing the ventral shields into 

 two nearly rectangular parts, which are broader than long. Branchiae 

 numerous and long, often half as long as the body, connected by a 

 slight web close to the base; the stalks smooth, with numerous minute 

 ocelli, in two irregular rows ; pinnae numerous, long and slender ; tips 

 of the branchiae without pinnae. Collar broadly interrupted above, flar- 

 ing and reflexed at the sides, with rounded upper angles, erect and sin- 

 uous at the latero-ventral margins, reflexed below, forming two short, 

 rounded lobes, separated by a narrow but deep central sinus, within 

 which there is a short bilobed organ. Tentacles thin, lanceolate, acute, 

 in preserved specimens not so long as the diameter of the body. The 

 anterior segment is divided by a deep dorsal sulcus, which is not con- 

 spicuous on the succeeding segments. Color of body greenish yellow, 

 dull olive-green, or greenish brown ; branchiae pale yellowish, greenish, 

 or flesh-color, often with numerous transverse bands of lighter and 

 darker green, which extend to the pinnae, and sometimes blotched with 

 brown; collar translucent, specked with flake- white; ocelli dark red- 

 dish brown. Specimens, apparently belonging to this species, were taken 

 from wood bored by Teredo, near New Hav^en. These had the body 

 olive-green, specked with flake-white anteriorly, on the ventral side, 

 especially on the first two segments ; branchiae mottled with greenish 

 brown and white and specked with flake- white ; ocelli brown, numerous. 



Length, 30'"°^; diameter,' 2.5'"^^ to 3™'". Preserved specimens are 

 about 20™'" long, 2.5™"^ broad. 



New Haven to Yiueyard Sound ; low- water mark to 5 fathoms. 



EUCHONE ELEGANS Yerrill, sp. nov. Plate X.VI, fig. 84. (p. 432). 



Body rounded, slender, gradually tapered backward; the anterior 

 region, which forms about one-half of the entire length, consists 

 of eight setigerous segments; these are biannulated and divided by 

 a dorsal, longitudinal sulcus, and by a lateral sulcus on each side be- 

 low the uncigerous lobes. The middle region consists of thirteen 

 shorter biannulated segments, which bear small fascicles of seta? on the 

 lower rami ; these are divided by a ventral sulcus, and also by the 

 lateral ones. The caudal region consists of about ten very short seg- 

 ments ; all of wiiich, except the last, bear small fascicles of seta\ These 

 segments are margined by a rather broad membrane, wider and rounded 



