REPORT ON SOME POLYCHAETOUS 
ANNELIDS 
Collected by the Barbados-Antigua Expedition 
from the University of Iowa in 1918 
CATHERINE AGNES MULLIN 
Department of Zoology, University of Iowa 
INTRODUCTION 
The annelids discussed in this report were collected at two of 
the British West Indies, Barbados and Antigua, which lie in 
the North Torrid Zone. Barbados, which is the most seaward 
of the group, is located at 13° 4’ north latitude and 59° 37’ 
west longitude. It has a heavy rainfall, but no streams. The 
island is rising, and consequently it has a very regular coast- 
line. Antigua is located at 17° 6’ north latitude and 61° 45’ 
west longitude. It has secant rainfall because it is located in 
the belt of calms. Since the island is sinking, the coast line has 
deep indentations; this gives rise to very different habitats. 
The normal rise and fall of the tide at each island is from 
two to four feet. Along the shores at low tide specimens were 
found in the sand, under rocks, in the little tide-pools, on the 
reefs and flats, in old coral-stone, and along the shallow sea- 
bottom. Deep-sea dredging was done at Barbados at a depth 
of 130-140 fathoms. In all, three chief methods were used in 
obtaining this material: tide-collecting, dredging, and diving. 
CLASSIFICATION 
Phylum Annulata—Bilaterally symmetrical animals with an extensive 
celome, distinct segmentation, and unjointed appendages. 
Class Chetopoda—Segments bearing lateral groups of sete. 
Sub-class Polycheta—Sete borne on parapodia. 
Order Errantia—Carnivorous free Polycheta with protrusible 
pharynx bearing jaws. Branchie generally on dorsal parapodia. 
Family Amphinomide—Body vermiform or oval and flattened. 
Head bearing a peculiar sense organ, the ‘‘caruncle.’’ 
1. Hermodice carunculata. 
2. Eurythe pactfica. 
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