264 PROCEEDINGS OF THE NATIONAL MUSEUM vol. S3 



distances over the entire surface (fig. 18, d). On the posterior margin 

 is a row of papillae of varying sizes, but the rest of the margin is 

 entire. 



Type.—U.S.^.M. no. 20112 (Chen no. 19). 



Genus LEPIDASTHENIA Malmgren 



LEPID ASTHENIA OCELLATA, new species 



The type and only specimen is 85 mm long and has a prostomial 

 width of 1 mm. From here the body widens to the tenth somite, 

 which is 5 mm wide. The somites immediately behind the tenth 

 show a sHght narrowing, and this narrower width is retained through- 

 out the greater part of the body, the narrowing at the region of the 

 pygidium being rather abrupt. Remains of thi'ee very slender anal 

 cirri persist in the specimen. 



The head region is covered by two translucent white elytra, which 

 extend from their attachment on the second setigerous somite to 

 about half the length of the terminal joints of the tentacles. Each 

 half of the prostomium is fiask-shaped, the "shoulder" of the flask 

 being a httle higher on the inside than on the outside (fig. IS, e) and 

 each haK is continued to form a cirrophore for the corresponding 

 tentacle. The tentacular style is slender, about twice as long as 

 the prostomium, and acuminate at the tip. The cirrophore of the 

 median tentacle is a Httle stouter than that of the laterals, and the 

 style is somewhat longer. The palps are relatively rather slender. 

 The tentacular cirri are very similar to the median tentacle in size 

 and form. All cirri are slender and sharp-pointed and somewhat of 

 a translucent white in color, although especialh' toward the ends they 

 carry patches of porcelain white. 



Ventrolateral to a line drawn from one eye to the other on either 

 side (in preserved material) is a brov%-nish pigment patch, and the 

 entire dorsal prostomial surface as far as the cirrophores has a faint 

 brown tint. On the inner side of the first parapodium where this 

 parapodium comes into contact with the side of the prostonnum are 

 a number of fine dark lines forming a definite pigmented patch. On 

 the dorsal surface of the first setigerous somite is a pigment patch, 

 and fine pigmented lines occur on alternate somites (the ones that do 

 not carry elytra). These at first are somewhat irregular, but by the 

 eighteenth somite the dorsal surfaces have definite pigment patches 

 formed of fine lines arranged longitudinally. A verj' little pigment 

 occurs at the base of each elytrophore. Beginning with the first 

 somite the dorsal surface between the above mentioned pigment 

 patches is colorless but has pigment on either side. This colorless 

 middle region is most noticeable in the first two somites, and by the 

 fifth the pigment has covered the middle region as Avell. The general 



