NEPHTYIDAE FROM NORTHEAST PACIFIC HARTMAN 153 



Parapodial lamellae poorly developed throughout, greatly reduced 

 in posterior half of body; acicular lobes conical (fig 65, 6, c) ; para- 

 podial rami widely diverging after the thirty-sixth setiger. 



Setae not conspicuous, consisting of smaller, prelamellar, barred 

 setae and postlamellar simple capillary and bristled capillary setae, 

 the latter with bristled area limited to a short, narrow region where 

 setae emerge from parapodial lobes. 



Dorsal anal cirrus as long as last 11 setigers; ventral anal cirrus 

 tiny, somewhat longer than width of anal ring. 



Named for Dr. Waldo L. Schmitt, of the United States National 

 Museum. 



Holofype.—V.S.^M. no. 20323. 



Distribution. — AJhatross station 3210 (1890) south of the Alaska 

 Peninsula, in 483 fathoms (type) ; station 3198 (1890) off central 

 California, in 278 fathoms; station 3195 (1890) off central California, 

 in 252 fathoms; station 2871 (lat. 46°55' N., long. 125°11' W.), in 

 559 fathoms. 



SystematiG discussion. — Nephtys schmitfi has affinities with N. 

 phyllohranchia INIcIntosh and probably also with lY. 7nodesta Grube. 

 N. phyllohranchia Mcintosh (1885, p. 164) was described from off 

 New York in 1,240 fathoms. The description fails to give the nature 

 of anterior and posterior recurved cirri unless they are understood 

 to be foliaceous throughout. Such is not the case in N. schmitti. 

 The number and distribution of papillary rows on the proboscis 

 are not given except to say that N. phyllohranchia, "approaches N. 

 modesta Grube." According to Grube (1878, p. 535), N. modesta is 

 provided with 12 rows of papillae. N. schmitti has 22 rows. Fur- 

 thermore, N. schmitti differs from N. modesta in the structure of its 

 recurved cirri. In the latter "branchiae pinnarum posteriorum bre- 

 vissimae triangulae," in N. schmitti they are long, digitiform (fig. 

 65, h). Grube could not have referred to the last few setigers, for 

 he had an incomplete individual of 56 segments. 



Grube's species was recorded from the Indian Ocean (Kerguelen) 

 in one place (1878, p. 535) and from the Straits of Magellan in another 

 (p. 511). According to Ehlers (1901, p. 68) the former record is 

 probably an error. 



NEPHTYS RICKETTSr, new species 



Figure 66 



Large, robust ; length to 30 cm ; width to 18 mm ; number of seg- 

 ments 110 to 120. Prostomium wider than long, broadly subtrape- 

 zoidal, its anterior margin gently curved; a deep, median, longi- 

 tudinal groove extending over most of its length. Dorsal frontal 

 antennae less than half as large as ventral antennae, the two of a 



