46 IOWA STUDIES IN NATURAL HISTORY 
spots. The anterior pair are the larger. There are five short 
Indian-club shaped palpi. The unpaired one is the shortest and 
searcely as high as the caruncle. The mouth is oval and ex- 
tends back as far as the third segment. The median parts of 
the fourth and fifth segments enter into the formation of a lip. 
The parapodia appear to be in two rows, dorsal and ventral. 
These may be the notopodia and neuropodia. Although they 
meet ati the first segment, from the second segment! to the pos- 
terior region they are widely separated; from here they gradu- 
ally converge to the end. Each of the ventral parapodia bears 
a small bundle of setz with a stout cirrus. The sete are very 
thick and stiff, and extend straight out. They terminate 
in two points of unequal length, the longer and wider of which 
has the greater curvature. The cirri are on the posterior bor- 
der of the parapodia. They originate from a thick base and 
extend to a blunt point. The dorsal parapodia are short and 
thick. They bear large bundles of sete, a cirrus like that of 
the ventral parapodia, and the branchiew. The sete of the dorsal 
parapodia, which extend outward and upward, are of two kinds: 
the one fine, glistening bristle-like sete, simple and linear 
in shape; the other kind serrated with ‘toothed edges point- 
ed backward. The branchia is a low, brush-shaped structure. 
It is located back of the dorsal cirrus and extends toward the 
flat dorsal surface. There are about eight short stems arising 
from a main trunk. These subdivide into small branches, and 
they end in thick, wedge-shaped filaments. 
The anus is dorsal and is located on the third from the last 
segment. The last segment bears two small knobby cirri. This 
specimen was found in a conch-shell at Barbados. 
Localities: Mau Wau, Formosa; Batan Island; Tataan, Tawi 
Tawi, San Pascual, Burias Island; Barbados. 
Order Sedentaria—Vegetable feeding Polycheta which permanently in- 
habit tubes. No protrusible pharynx; no jaws or teeth. Branchize, 
when present, usually confined to anterior end and sometimes represent- 
ed by modified tentacles. 
Family Serpulide—Tubes calcareous. 
