308 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [602] 

 SCOLECOLEPIS CIKRATA Malmgren. (p. 501.) 



Annnlata polychaeta, p. 91, PI. 9, figs. 54 A-54 D. Nerine cirrata Sars, Nyt. Mag., 

 vol. vi, p. 207 (teste Malmgren). 



This is a larger and stouter species than either of the preceding. 

 The front of the head is broadly rounded, with prominent, rounded, 

 lateral angles ; the foliaceous lateral appendages are larger and much 

 wider. 



Off Block Island, in 29 fathoms, and in the deepest parts of Vine 

 yard Sound, near the mouth; off Saint George s Bank, in 110 and 150 

 fathoms. Northern coasts of Europe; Spitzbergen; Greenland. In 20- 

 250 fathoms. (Malmgren). 



SPIO SETOSA Yerrill, sp. nov. Plate XIV, fig. 77. (p. 344.) 



Nerine coniocephala ? A. Agassiz, Annals Lyceum of Nat. Hist, of New York, vol. 

 viii, p. 333, PL x, figs. 39-45, 1866, (now Johnston.) 



Body long, moderately slender, flattened dorsally, convex below, 

 obtuse anteriorly, slightly tapered toward the posterior end. Head with 

 a prominent median lobe, which is sub-truncate and a little turned up 

 at the front end, with the corners a little prominent and rounded ; lateral 

 lobes shorter than the median; on the posterior part of the vertex 

 there is a small median, conical prominence. Eyes four, on the vertex, 

 the posterior pair nearest together; antennae long. Branchiae moder 

 ately long, slender, ligulate, largest on the anterior segments. On the 

 first three or four segments the upper ram us ot the feet has a slender 

 dorsal cirrus, which disappears farther back. The setae of the upper 

 ram us are long, acute, and form a broad fascicle, in which the upper 

 ones are much longer and more slender, divergent; the lower stouter 

 and more or less bent; they are longest on the first four or five 

 segments, the upper ones considerably exceeding the branchiae. The 

 lower ramus is small and but slightly elevated; on the anterior 

 segments it bears a small fascicle of short, acute, bent setae, much 

 shorter than those of the upper ramus, and closely crowded together 

 in two or more rows, with a small ventral tuft of longer and more 

 slender setae; farther back the acute bent setae begin to be replaced 

 by uncinate setae, which, at about the tenth segment, form a complete 

 transverse row, parallel with a row of slightly longer, pointed setae, 

 w r hile the small ventral tuft of longer acute setae still remains, and all 

 the setae in the broad fascicle of the upper ramus are acute and much 

 longer. In the middle region of the body, the uncini of the lower 

 ramus form a close row, containing fifteen to twenty; they are strongly 

 recurved near the end and margined. 



Length up to 80 mm ; diameter about 2.5 mm . 



New Haven : Wood s Hole ; and Naushou Island ; in sand, at low- 

 water. 



This species appears to be the same as the one studied by Mr. Agassiz, 

 though it differs slightly from his figures, one of which 1 have copied. 



