108 THE ANNELIDA POLYCHAETA. 



The body at present is a dull grey, in part of a decidedly bluish tinge. The 

 conspicuous styles of the cirri are brown. 



Locality. — Panama. Shore. 12 March, 1891. Five specimens. 



This species in having twelve rows of papillae falls in the main group of the 

 genus. It seems to be easily distinguished from other species of the genus at  

 present known through the unusually large number of papillae in the rows 

 upon the proboscis in connection with the form and proportions of the pro- 

 stomivma, and particularly the form of the notocLrri and neurocirri. Its relations 

 are indicated in the key previously given. 



Phyllodoce Savigny. 



Descript. Egypte. Hist, nat., 1809 [= 1822], 1, pt. 3, p. 13, 42; Czerniawsky, Bull. Soc. imper. nat. 



Moscou, 1882, 57, p. 158 (char, emend.); McInto.sh, British annelids, 1908, 2, pt. 1, p. 74; Berg- 



STROM, Zool. bidrag, 1914, 3, p. 108, 118 (char, emend.). 

 Carobia Qtjatrefages, Hist. nat. annelfe, 1865, 2, p. 145. 

 Protocarobia Czerniawsky, op. cit., p. 155. 

 Non Phyllodoce Claparede, Annelidas Ch6top. Golfe Naples, 1868, p. 546, 575. 



Phyllodoce pakaravana, sp. nov. 

 Plate 16, fig. 7-12. 



This form is broadest anteriorly and narrows strongly caudad, becoming 

 in the middle and posterior region very slender and geophiloid. The total 

 length of the type is about 125 mm. The width at the anterior end, exclusive 

 of the parapodia, is 2 mm., and inclusive of the parapodia, 3 mm. The width 

 at the middle over all is but 1 nmi., and in the caudal region is still less. The 

 total number of somites in the type is four hundred and ninety-three, but it is 

 incomplete, as an uncertain number of somites are missing from the caudal end. 



The general color of the body is light yellow, darker, more brownish, at the 

 anterior end above. The appendages are of a similar color excepting the dorsal 

 cirri, which are rust-brown and together form a conspicuous dark stripe along 

 each side of the body, the stripes being strongly marked caudad but less con- 

 spicuous anteriorly. 



The prostomium is much wider than long (nearly 3:2). It is flattened 

 dorsoventrally as usual. In outline as seen from above it is hke a cordate body 

 transversely truncate behind middle, and with a convexly bulging prominence 

 at the middle of the anterior edge to which the tentacles are attached. It is 

 widely incised behind at the middle, though the incision is not deep. It is 



