Smith and Harger — St. George's Hanks Dredgings. 43 



Rhynchobolus capitatus Verriii. 



Glycera capitata (Ersted, Gronl. Ann. Dorsibranchiata, p. 44, plate VII. figs. 87, 

 88, 90-94, 96, 99 ; Malmgren, Annulata Polychseta, p. 70, 1867 {non Claparede). 



This species is furuisliecl with four well-developed jaws, and there- 

 fore belongs to the genus Rynchoholus, as constituted by Claparede. 

 The species without jaws, which he refers to Glycera., must be distinct. 



Saint George's Bank, 60 fathoms (locality e) ; 20 fathoms (locality 

 j)\ 110 fathoms (locality o) ; east of Saint George's, 430 fathoms 

 (locality g). Greenland, Iceland, Spitzbergen, and northern coasts of 

 Europe to Great Britain. — A. E, V. 



Samythella VerriU. 



Body elongated, composed of about 50 segments, 15 of which bear 

 fascicles of setie; and posteriorly about 35 bear uncini only, but 

 have a small conical papilla above the uncigerous lobe, as in Melinna • 

 the uncini commence on the 4th setigerous ring. Branchiae six, placed 

 side by side in a continuous transverse row. Cephalic lobe oblique, 

 somewhat shield-shape, with a narrowed prominent front. Buccal 

 lobe shorter. Tentacles numerous, smooth and slender. 



This genus is closely allied to Sumytha of Malmgren, in the struc- 

 ture of the head and number of branchiae, but diifers in having a 

 much larger number of segments (in this respect approaching 

 Melinyia)^ and in having only 15 setigerous segments, instead of 17. 



Samythella elongata Verrili. 



American Journal of Science, III, vol. v, p. 99, 1873. 



Body slender, composed of 54 segments in the specimens examined, 

 tapering regularly to the posterior end. Cephalic lobe about as 

 broad as long, broadly rounded posteriorly, with the postero-lateral 

 corners prominent and well rounded, the sides slightly incurved and 

 rapidly narrowing to the front, which is about half the width of the 

 back, and subtruncate, projecting forward ; the middle region is a 

 raised and convex oblong area as wide as the front edge, into which 

 it runs. Buccal lobe a little shorter. Tentacles numerous, slender, 

 tapering. Branchia? subequal, slender, tapering, about twice the 

 length of the cephalic lobe. Setse numerous and long in all the fas- 

 cicles except the first three, the longest nearly one-third the diameter 

 of the body. The posterior end of the body is surrounded by about 

 eight small papilloe, of which the two ujjper ones are largest. 



Length of largest specimen, in alcohol, 40'"'"; diameter, 2-5 to 3'"'". 



The tubes consist of a thin and tough lining, to which a close layer 

 of sand, in grains of moderate and nearly uniform size, is firmly 

 cemented. 



