222 University of California Publications in Zoology [Vol. 13 



Metachone mollis Bush 



Metachone mollis Bush (1904), p. 216, pi. 35, figs. 19, 20, 28. 

 Collected in haul XLIII-1, in San Diego Bay in 3 to 7 fathoms 

 on soft black mud. 



Laonome punctata Treadwell 



Laonome pu7ictata Treadwell (1906), p. 1178, figs. 76, 77. 

 Collected from Honolulu. 



Laonome oculifera sp. nov. 



PI. 12, figs. 39-43 



The body, without the gills, is twenty millimeters long. It is 

 six millimeters wide at its widest point, the thorax. The thoracic 

 region is slightly flattened, while the abdomen is more nearly rounded, 

 gradually tapering to its end. The thorax consists of eight somites 

 and the abdomen of about sixty. The collar is two-lobed and rather 

 prominent. Its edge is entire and its parts widely separated dorsally, 

 while its ventral free ends are prolonged into slightly rolled edges, 

 those of the two sides being in contact. The color, in alcohol, is a 

 uniform light brow^n, the gills being somewhat lighter than the rest 

 of the body. No colored spots occur except the eyes on the radioles. 



There are about twenty-four radioles on a side arising from a 

 prominent base which is slightly coiled ventrally. There are two rows 

 of barbs on the inner face of each radiole. They are largest near its 

 base, becoming very small toward its apex. The basal ones are black 

 and the others are colored like the radiole. Each radiole has from one 

 to five prominent light brown eyes on its dorsal surface. 



The faecal groove is prominent in the abdomen. It bends to the 

 right of the animal at the posterior end of the eighth somite, where 

 it continues to the dorsal surface. Ventral scutes are prominent on 

 all somites, the first thoracic one being much the largest. Its middle 

 length is almost half its width, while that of the other thoracic scutes is 

 only one-fifth their width. All of these, and six or seven anterior 

 abdominal ones, tend toward a biannulate condition. The remaining 

 scutes are about three times broader than long and each is equally 

 divided by the faecal groove. 



There are two sorts of setae on the collar fascicle. Dorsally there 

 is a bundle of long, gently tapering, sometimes slightly curved setae, 

 each of which has a wing on either side (pi. 12, fig. 39). Ventrally 



