PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 79 



The body is of fairly uniform width throughout and is apparently 

 a little more flattened anteriorly than posteriorly. Parapodia from 

 the fourth to the seventh are somewhat more prominent than else- 

 where, and their length is more than one-half the body diameter. 

 Aside from a slight decrease in length toward the posterior end, 

 later parapodia are similar to these in form. They all taper slightly 

 toward the apex, which has a small jDosterior lip. The dorsal cirrus 

 is considerably longer than the parapodium, and the ventral cirrus 

 has the form of a blunt-ended elongated cone situated on the lower 



face of the parapodium at some 

 distance from its base and not 

 reaching to the parapodial apex. 



The pharynx is dark brown, its 

 margin darker brown and smooth, 

 with a single large median tooth. 

 Figure 1, c, shows this tooth just 

 protruding through the mouth as 

 seen from the ventral surface with 

 the palps forming the background. 

 The proventriculus is colorless and 

 inconspicuous, extending through 

 only about three somites. 



Two forms of setae apparently 

 occur in all somites, cases where the 

 simple ones are absent being evi- 

 dently due to accident. Both kinds are long and very slender. The 

 compound form (fig. 1, d) has a small terminal joint without any 

 lateral denticulations. The simple seta is slightly heavier than the 

 compound and is beveled at the end (fig. 1, e). Only one occurs in 

 each parapodium, and it lies at the dorsal surface of the seta bundle. 

 The holotype (U.S.N.M. No. 19599) and paratypes were collected 

 at Station 8835, off Cape Henry, Va., in 20 fathoms, July 9, 1920. 



Figure 1. — Pionosyllis manca, new spe- 

 cies : a. Anterior end, X 75 ; b, anal 

 cirri, X 75 ; c, ventral view of pro- 

 boscis with protruding tooth, x 68 ; 

 d, compound seta, X 550 ; e, simple 

 seta, X 550 



MYRIANA CIKRATA, new species 



Figure 2 



This new form is assigned to the genus Myriana because of its 

 flat leaflike dorsal cirri and the absence of ventral ones. All speci- 

 mens are variable in length; one 4 mm. long has a body width of 

 0.3 mm. 



In the holotype the prostomium (fig. 2, a) is rounded anteriorly 

 and has no trace of any palps. The eyes are large, those of the same 

 side in contact ; the anterior ones are a little farther apart than the 

 posterior; lenses prominent. The median tentacle is the longest, 

 reaching a length several times that of the prostomium. The lateral 

 tentacles are similar to this in form but are shorter. The dorsal 



