EUNICE FLORIDANA. 



441 



maxillary plates (II) have six teeth on the right, five on the left. The paired plates (IV) 

 have nine or ten on the right, seven or eight on the left; impaired (III) five teeth. The 

 two anterior (V and VI) have each a tooth. In small forms, as this author observes, the 

 teeth are fewer. The mandibles (Plate LXV, fig. 7 b) have expanded anterior plates and 

 long tapering shafts. 



In transverse section (Fig. 85) the great muscularity of the species is noteworthy, and 

 the dorsal longitudinal muscles are specially large. A large neural canal exists inferiorly. 



The typical foot (Plate LXXV, fig. 2) has an unjointed dorsal cirrus, which from the 

 seventh foot onward to the tip of the tail carries a branchia. The first branchia has one, 

 two, or three divisions, and as a rule the maximum number (which Marenzeller locates from 

 the sixteenth to the eighteenth) is four. The branchiae are less developed in small forms 

 (Plate LXXV, fig. 2 a). While, however, the foregoing description applies to many 

 examples, it does not suffice for all. Thus some well-developed specimens show greater 

 freedom in the branches of the branchiae, a feature exemplified even in the first, which in 



Fig. 85. — Transverse section of the anterior third of Eunice floridana. The dorsal longitudinal muscles are 



of great size. 



one had been mutilated, and from the stump sprang a short tuft of six filaments. The 

 second, however, had only two of the usual aspect, but they rapidly increased, so that the 

 tenth foot had six, and some of the succeeding had seven filaments and possibly one or 

 two more might have been found in others, for Ehlers 1 figures nine. No apparent 

 difference could be detected in the branchiae of the two sexes. 



The setigerous region is supported by two powerful black spines, the tips of which 

 generally pierce the skin. The dorsal bristles (Plate LXXXIII, fig. 10 c) are simple, with 

 finely tapered tips and narrow wings. The brush-shaped forms (Plate LXXXIII, fig. 10) 

 have a long process at one side. The compound (falcate) bristles (Plate LXXXIII, fig. 10 a) 

 are yellowish, dilated toward the distal end of the shaft, which is bevelled and has internal 

 striations. The terminal piece is somewhat short, with a bifid tip, and winged. The 

 ventral hooks (Plate LXXXIII, fig. 10 b) appear about the thirty-first foot and continue to 

 the posterior end. At first they are single, but by-and-by two project, and this till near 

 the tip of the tail, when again a single hook occurs. The greater part of the hook is 

 black, the proximal and distal ends alone being yellow. The tip has a strong fang at 



1 c Florida Aimel./ pi. xxii, fig. 4. 



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