304 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [598] 



meuce on the twenty-sixth setigerous segment as minute papillae; on 

 the twenty-eighth they become prominent and acute-conical ; farther 

 back they become long, lanceolate, thin, foliaceous, as long as the diame 

 ter of the body. 



On the twenty-three anterior setigerous segments the &quot; feet&quot; are rep 

 resented by two short, dense, fan-sbaped fascicles of seta? on each side- 

 On the twenty-fourth segment a small papilliform lobe, or ventral cirrus, 

 appears below the lower ramus, which rapidly becomes larger on the 

 succeeding segments, becoming quite conspicuous on the twenty-ninth 

 segment; at about the twenty-eighth it becomes broader, and divided 

 into three small lobes, the lowest broadest and thinnest, and a bilobed 

 setigerous lobe is developed. At the thirtieth the ventral lobe becomes 

 broader, somewhat foliaceous, with a rounded outline; farther back 

 this becomes still larger and more foliaceous, with a broadly-rounded 

 fiexuous outer border, and the upper branch of the setigerous lobe be 

 comes an elongated ligulate process, directed upward, and similar in 

 form to the branchia3, though smaller and more slender, but the lower 

 branch remains small and rounded ; a small fascicle of long, slender 

 setse arises from between them. On the twenty-seventh segment an 

 upper cirrus appears on both the upper and lower rami, in the form of 

 a small papilla, which becomes somewhat elongated and tapering at the 

 twenty-ninth ; that of the lower ramus continues small throughout, and 

 much shorter than the setigerous or ventral lobes, but that of the upper 

 ramus becomes rapidly larger, longer, and more ligulate, corresponding 

 nearly with the branchia3 in size, form, and rate of increase. On the 

 middle and posterior regions the upper ramus consists of this long, 

 thin, lanceolate cirrus and a fascicle of long, slender setae, arising from 

 the anterior face of its base, and in length considerably exceeding the 

 cirrus; the setas are pale yellow. Those of the upper ramus are short 

 anteriorly, and become decidedly longer at the twenty -eighth segment, 

 and on the thirty-second and subsequent segments they form a long, 

 divergent, fan-shaped fascicle; color, when living, ocher-yellow, orange- 

 yellow, to 3 T ellowish brown, generally brighter yellow posteriorly. Usu 

 ally there are two rows of brown spots along the back, and posteriorly 

 there is a dorsal red or reddish brown line ; branchia3 blood-red. 



Length of large specimens up to 375 mm or more; breadth, 10 mm ; ordi 

 nary specimens are about 300 mm long and 7 mm broad. Owing to the 

 facility with which it breaks up when disturbed, it is difficult to obtain 

 entire specimens of large size. 



Great Egg Harbor, New Jersey; Xew Haven; Wood s Hole; in sand, 

 at low-water. 



ANTHOSTOMA FRAGILE Verrill, sp. nov. (p. 344.) 



Body long and slender, composed of very numerous segments, very 

 fragile, and prone to divide spontaneously when disturbed; thickest 

 and sub-cylindrical anteriorly, tapering rapidly to the head; posterior part 



