86 LEODICID^E OF THE WEST INDIAN REGION. 



dorsally, not more than one-third the length of the second somite. Neither of the 

 first two somites has a parapodium. 



The maxilla (text-figure 299) is faint brown as seen by transmitted light, with darker 

 bands along the line of junction between the forceps and the carrier. The carrier is 

 longer than the forceps, each half in the form of an elongated triangle, its inner basal 

 angle nearly a right angle. The forceps has a very stout base, the terminal portions 

 being very much narrower and bent at the apices. In the single specimen available 

 for this drawing, the pieces of one side had been turned over and were drawn as seen, 

 though this gives a distorted view of the right half. The proximal paired plates have 

 each 3 large teeth and an unpaired plate lies just beyond them. In the position in 

 which the latter lay I was unable to determine if its margin is toothed. Distal to these 

 plates are, on either side, two small hook-like hardenings in the chitinous framework of 

 the jaw. The mandible is much larger than the maxilla (text-figure 300). The 'halves 

 are in contact only at their anterior ends, and the free margin bears a series of tooth- 

 like thickenings. The anterior lateral margin of each half is much thicker than the rest 

 and appears dark by transmitted light, simply because of its greater opacity, the whole 

 mandible being without any trace of pigmentation. 



The first parapodium was injured in removing the jaw, but the second was drawn. 

 This (text-figure 301) has a heavy cylindrical ventral cirrus and a longer, more slender 

 dorsal one. The anterior setal lobe is smaller than the posterior, and an acicula lies 

 between the two. There is a tuft of setae of the two kinds figured in text-figures 302 

 and 303. A parapodium from the middle of the body (text-figure 304) has ventrally a 

 very large, thickened swelling from whose apex the small ventral cirrus extends. There 

 is no distinction to be seen between anterior and posterior lips, and the large acicula 

 extends to the tip of the setal portion. 



The compound seta? (text-figure 302) are very small, the basal portion slightly bent 

 and finely serrate. The terminal portion of each has an apical and a subapical tooth 

 and the margin of its hood is serrated. The simple setse (text-figure 303) are very long 

 and slender, tapering to an acute point and serrated near the apex on both margins. 



Type in the American Museum of Natural History. 



Lysidice notata Ehlers. 

 (Plate 8, figures 1 to 4; text-figures 305 to 313.) 



Lysidice notata Ehlers, 1887, p. 100, plate 30, figures 1-9. 

 Lysidice bilobata Verrill, 1900, p. 645. 



Comparison of the descriptions of the two species by Ehlers and Verrill would 

 indicate one very marked difference between them in the character of the prostomium. 

 Ehlers describes and figures his L. notata as having a prostomium with an entire, rounded, 

 anterior margin. Verrill, on the other hand, describes, though he gives no figure, his 

 L. bilobata as having a deeply indented anterior margin to the prostomium. Since I 

 can find no other differences between the descriptions, and since in my collections in the 

 vicinity of Key West I find specimens in which this anterior indentation is practically 

 lost in the alcoholic material, I am convinced that the two are identical. This view is 

 strengthened by study of specimens from Bermuda. If this is the case, Ehlers's name 

 has priority. 



A small species occupying crevices in the decayed coral rocks in much the same 

 localities as Nicidion kinbergii, but usually farther below the surface. General appear- 

 ance is much like that of Nicidion kinbergii (see p. 91). An average, specimen would be 

 about 85 mm. long, with a head width of about 1.5 mm., and contains about 190 somites. 



The prostomium is bent slightly ventrally, with a rather shallow median depression 

 seen better from the ventral than from the dorsal surface. It is a trifle wider than the 



