LEODICID.E OF THE WEST INDIAN REGION. 79 



and slender, colorless in small individuals, but in older ones with a brownish coloration 

 throughout most of their length (plate 7, figure 2). It was not easy to get specimens 

 with tentacles unbroken, but those that seemed most normal had the median and the 

 inner paired ones about equal in length, while the outer paired were about two-thirds 

 as long as the inner. In a 40 mm. specimen the inner tentacle extended to the sixteenth 

 somite, but in larger ones the length of the tentacles was relatively less. The eyes (plate 7, 

 figure 2) are very obscure, between the bases of the inner and the outer paired tentacles. 

 The prostomium and palps had numerous brown spots, some of these as large as the eyes. 

 The palps are very large, extending as far forward as the apex of the anterior tentacles. 



The peristomium (plate 7, figures 1 and 2) is a trifle wider than the prostomium, 

 with a distinctly folded anterior margin which may extend almost to the bases of the 

 tentacles when the prostomium is withdrawn. The nuchal cirri are situated about in the 

 middle of the peristomium, on a line with the bases of the outer paired tentacles, and 

 extend beyond the ceratophore of the latter (plate 7, figure 2). Each has a median 

 brown band and more or less color in the form of brown spots near the base. Succeed- 

 ing somites (plate 7, figure 2) have these brown spots as prominent markings, sometimes 

 arranged in three irregular transverse rows. Toward the middle of the body, owing 

 to the development of a greater amount of dark pigmentation, these spots become less 

 prominent and later disappear entirely. Toward the posterior end the body shows a 

 decided orange tint (plate 7, figure 1) and in a sexually mature female may be tinted 

 green from the spots of green pigment on the eggs seen through the body-wall. There 

 are two pairs of very slender anal cirri, one pair much larger and longer than the other 

 (plate 7, figure 4). 



The first parapodium (plate 7, figure 2) is a fleshy cylindrical structure with the 

 cirri carried well toward its apex and extends beyond the anterior border of the peri- 

 stomium. The setal portion bears ventrally at its end two unequal rounded lobes (text- 

 figure 279, p. 77) and dorsally two long equal cirrus-like processes. The dorsal cirrus is 

 only slightly constricted at the base and extends beyond the terminal processes. The 

 ventral cirrus arises nearer the body than the dorsal and is a little smaller than the 

 dorsal, but of approximately the same form. A tuft of aciculse lies in the upper part of 

 the setal lobe and about 10 compound setse arise from the setal lobe. This and later 

 parapodia are marked with dark-brown spots like those on the body-wall. 



The second, third, and fourth parapodia are successively shorter than the first, 

 extend beyond the body more nearly at a right angle, and lie successively nearer the 

 ventral surface, so that the bases of the fifth pair are separated ventrally by a distance 

 hardly greater than the length of the somite. Their form is essentially like the first, 

 except that the ventral cirrus becomes more pad-like in appearance, and on the fifth 

 parapodium it is a short, conical projection on the end of a thick pad. On the sixth 

 parapodium only the pad is present and this is much larger than on the fifth. From the 

 sixth to the twelfth parapodia these pads are placed at higher and higher levels, so that 

 the twelfth is on the lateral margin of the somite. The tenth is the largest, and behind 

 this there is a decrease in size to about the fiftieth ; behind this they are continued to 

 the end of the body, but retain a uniform size relatively to the body diameter. Anteriorly, 

 brown spots occur on the ventral face of the somites and on the posterior surface of 

 these pads, but as the latter become smaller the spots disappear and a pigment patch 

 on the dorso-lateral surface of the pad makes its appearance. 



The tenth parapodium (text-figure 280) differs decidedly from the first. The setal 

 lobe has an antero-dorsal cirrus-like outgrowth and a longer postero-dorsal one, the latter 

 continuous with a vertical plate which extends to the ventral edge of the setal lobe. 

 The dorsal cirrus is shorter and more slender than in the tenth and is carried on the base 

 of the heavy gill. The ventral cirrus, as stated above, is replaced by a large pad. A 

 vertical row of stout setse lies just in front of the posterior plate, and a smaller tuft of 



