66 University of California Puhlications in Zoology [Vol. 18 



zig-zag line. The median tentacle consists of a long, heavy basal por- 

 tion and a short style about one-fourth the length of the former. At 

 the base of the tentacle on each side of it are a pair of eyes partly 

 covered by the tentacle when the latter is bent posteriorly. The ven- 

 tral eyes (pi. 4, fig. 12) are small, flanked on each side by very small 

 antennae. The palpi are broad and flat, divided longitudinally by 

 a median cleft. The mouth (pi. 4, fig. 12) is bordered posteriorly by 

 the fifth segment. 



The parapodia are typical of the genus, with the notopodium 

 merging into the dorsum. The setae are of two kinds. The ventral 

 setae (pi. 4, fig. 4) are long, one-third of the width of the body, 

 slender, hollow, and very brittle, of straw color with a subterminal 

 spur. The dorsal setae are similar in shape (pi. 4, fig. 5) but they are 

 much shorter and stouter than the ventral, slightly surpassing the 

 length of the branchiae (pi. 4, fig. 10). 



There are ten to eleven pairs of branchiae on each segment. The 

 main trunks of branchiae (pi. 4, figs. 8, 9, 10) are subdivided into 

 smaller finger-like projections, the number of which may vary accord- 

 ing to the size of the trunk. The finger-like ramifications are usually 

 about 10 to 12 on a trunk, but some of the gill-trunks of the anterior 

 end have only about 5 or 6 ramifications. 



There are two dorsal cirri and one ventral. The short and heavy 

 ventral cirrus (pi. 4, fig. 12) is situated at the posterior edge of the 

 neuropodium on the ventral surface. The two dorsal cirri are short, 

 stout, attenuating toward the end, terminating bluntly (pi. 4, fig. 10). 

 The dorsal cirrus is posteriad of the last dorsal gill-trunk. The lateral 

 cirrus is between the fifth and the sixth gill-trunks, counting from 

 the mid-dorsal line. It is short, reaching only halfway the length of 

 the branchiae. 



The single specimen in the collection is from Kodiak Island, 

 Alaska. Further data unknown. 



3. Eurythoe spirocirrata sp. nov. 



PI. 4, figs. 15-17; pi. 5, figs. 18-23 



Diagnosis. — Body long, slender, gray in alcohol. Dorsal surface 

 slightly convex. Ventral surface strongly convex. Sides between 

 parapodia vertical and flat. Branchiae marginal. Two cirri on each 

 parapodium. Caruncle broad, smooth, extending to fourth segment. 



Description. — The species is a typical representative of the genus 

 Eurythoe. The body is long, somewhat uniform in width, very grad- 



