432 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. [1885. 



Nothria conchyphila Veirill. 



Verrill, Trans. Couu. Acad., vol. iv, pi. 23, fig. 4, 1881. 



Verrill, Report U. S. Fish Com. for 1883, [p. 22], pi. 41, fig. 181, 1885. 



Body elongated, depressed, narrow and slender, of nearly uniform 

 width throughout the' greater i)art of its length. The head is moder- 

 ately large, short, nearly as broad as the buccal segment. The median 

 and upper lateral antennae are long, slender, gradually tapered, with a 

 large basal portion composed of seven, eight, or more annulations. 

 The outer lateral antennae are similar in form, but are scarcely more 

 than half as long as the upper lateral ones. The buccal segment is 

 large, longer, but not so wide as the first body-segment; it is broadest 

 in front and tapers backward to the suture, and bears near its front 

 dorsal margin a j)air of small, tnsiform tenacular cirri, which scarcely 

 reach forward to the bases of the aiiteimce. The first body-segment is 

 larger than those that succeed it, broadest anteriorly, narrowed poster- 

 iorly to the suture; it bears large, prominent parapodia, which turn 

 somewhat forward and downward. These bear rather long dorsal cirri, 

 rising from beyond the middle of the dorsal side, and a similar but 

 somewhat shorter, slender ventral cirrus, with a cirriform setigerous 

 lobe and a small cluster of setae between them. The two succeeding 

 pairs of parapodia are similar iu form and structure, but are less turned 

 forward, and bear larger fascicles of sette. Branchiae commence on the 

 fifth body-segment and have at first three or four divisions; farther 

 back they increase in size and number of pinnae. 



Stations 865 to 867 in 64 to 65 fathoms, abundant, and at station 895 

 iu 238' fathoms, 1880; also taken in great abundance at many other 

 stations in subsequent seasons by the Fish Hawk and Albatross, iu 65 

 to 350 fathoms. Especially abundant off Chesapeake Bay and Cape 

 Hatteras in 60 to 100 fathoms. 



Notophyllum Americanum Verrill, sp. nov. 



Verrill, Trans. Conn. Acad., vol. iv, pi. 23, figs. 7, la. 

 Verrill, Report U. S. Fish Com. for 1833, pi. 40, fig. 184, 1885. 



Body rather large, elongated, composed of numerous segments, some- 

 what narrowed toward the head, abruptly narrowed and obtuse at the 

 posterior end. Head rather small, subtruncate posteriorly, somewhat 

 narrowed and obtuse anteriorly, broadest across the eyes, which are 

 large, situated near the posterior angles, and project somewhat beyond 

 the margin of the head. Four frontal antennae nearly equal, somewhat 

 fusiform, tapered to the tip, in length about equal to the head, each with 

 a dark green spot in the middle. Median antenna much longer than 

 the frontal, similar in shape, and with a similar median spot ; it arises 

 from between the eyes. Tentacular cirri four ou each side, the two an- 

 terior shorter, scarcely more than half the length of the two posterior, 

 but about one-third longer than the median antenna. The two poste- 

 rior tentacular cirri are rather large, stout, regularly tapered, and about 

 four times the length of the median antenna. Behind the Dosterior 



