170 PEOCEEDIXGS OF UNITED STATES NATIONAL MUSEUM. 



lacking), SS"'" ; breadtli, including setse, 16°^; breadth of body alone, 

 Qmm. iengt,li of largest scales, S™'^; breadth, 5.5"^. 



One specimen, in alcohol. Sable Island Bank, off Xova Scotia, Cap- 

 tain McPhee, schooner ••Carl Schm^z,'' November, 1878 (U. S. Tish 

 Commission). 



Autclytus omatus, sp. no v. 



A small, slender species. The female form is easily distingiiishedby 

 the bright red color of the ova and embryos, sho^^ing conspicuously 

 through the pale yeUo^vish integuments of the body, or incubatory sac. 

 The head is short, broad, shghtly emarginate in fi'ont ; eyes conspicuous, 

 lateral, rounded; antennae nearly equal, the median one a little the lon- 

 gest ; lateral ones about twice the length of the head. Dorsal cirri long, 

 slender, about etiual to the diameter of the body. The three anterior 

 segments bear only short seta?, but fascicles of long seta? comm«^nce on 

 the fomth ; these are nearly as long as the breadth of the body. Length, 

 about 5°^. 



Vineyai'd Sound, at surface, July 13 and August 28, 1875. 



Another form, possibly the male of this species, was taken July 21. 

 This was bright gTcen in color. The lateral anteunie were of moderate 

 length, tapered, swollen at base ; odd median antenna and upper tenta- 

 cular cirri slender, very long, about equal to half the body. Dorsal cini 

 long, more than half the diameter of the body. Fascicles of long setue 

 commence on the fourth segment. 



Odontosyllis lucifera Yerrill. 



£usyUi8 lucifera Yerrill, Amer. Jour. Science, vol. s, p. 39, 1875. 



An examination of the armature of the oesophagus of this species 

 shows that it belongs to the genus Odontosyllis. The chitinous rim is 

 somewhat horseshoe-shaped, the exti-emities often angular or tooth- 

 like, turning inward and downward, while the opposite side bears a row 

 of about six small, sharp, inciu-ved denticles. Anal cirri two, rather 

 long and slender, transversely liued. 



Pedophylax longiceps, sp. nov. 



A very slender species, allied to P. disjyar Webster, but with much 

 longer head and palpi, and longer and stouter caudal cin-i. The head 

 is nearly as long as broad, both the front and posterior edge a httle 

 produced in the middle ; median antenna arising in advance of the cen- 

 ter of the head, swoUen toward the. end, but with the tip acute, some- 

 what longer than the head, but scarcely reaching beyond the middle 

 of the palpi; lateral antennse very small, papiUiform, nearly in line 

 with the odd one. OcelU four, the two pairs close together on the 

 head, the anterior just outside of the lateral antennse, the others just 

 behind them. Palpi very long, more than twice as long as the head, at 

 the base as broad as the head, slightly swoUen, tapering gradually to 

 the narrow end, the sides nearly straight or slightly incurved, shghtly 



