556 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi. 



four each, the second six of these, as shown in the formula cl-4+^9 

 — 10+c6 + c7 + f?15 — 16 + C9-12, and in some cases dl3 and 14 are devel- 

 oped. The annuli from fifty-seven to sixty-three (the last), inclusive, 

 become simplified and are either undivided or faintly biannulate. The 

 anus is between sixty-one and sixty-two. 



I describe the color somewhat fully. The pattern is made up of 

 irregular and often confluent blotches of brown on a yellowish ground, 

 disposed differently in each specimen, but with a strong tendency to 

 assume the annular or banded arrangement in all, except on the middle 

 dorsal region, where the inner portions of the brown spots tend to 

 become confluent into a pair of longitudinal stripes separated by a nar- 

 row but conspicuous median yellow stripe. The head is characteristic- 

 ally colored. The anterior two thirds is yellowish, the posterior third 

 marked by a conspicuous band of dark brown which in the three larger 

 specimens extends two-thirds of the way around and on the smallest 

 only one-half, leaving an uncolored ventral area. Dorsally, the dark 

 band is interrupted by a narrow median line of bright yellow. Two 

 pairs of dark brown eyes (separated by two-thirds of the width of the 

 head) are situated at the angles of a parallelogram whose anterior and 

 posterior sides correspond with the boundaries of the dark band. The 

 anterior eyes are the larger. In some of the specimens the angles of 

 the band, where broken dorsally, show an intensification of the pigment, 

 which in one specimen bears a superficial resemblance to two additional 

 pairs of eyes. In all of the specimens the dark ring is succeeded by a 

 pale one which occupies the last cephalic and first and second post- 

 cephalic annuli. Then follow eighteen more or less distinctly marked 

 irregular brown rings, of which four are anteclitellial, two clitellial, and 

 the remainder postclitellial. Brown, more or less conspicuously, pre- 

 dominates to the twelfth ring, i)Osterior to which the pale background 

 increases. Several annuli in the neighborhood of the anus are always 

 pale. 



The four preclitellial rings show a strong tendency to fuse both dor- 

 sally and ventrally (more particularly the latter), sometimes the first 

 three, sometimes the last three, or all four being thus united. The dor- 

 sal pigmentation then tends to split up into three yellow and two brown 

 longitudinal lines, the latter being usually j)redominant. There is 

 always a comj)lete white ring just anterior to the clitellum. The clitel- 

 lum is heavily pigmented above; and below, especially in the middle 

 region, is almost devoid of color. The pattern is longitudinal. There is 

 a rather broad median yellow stripe, a brown stripe (composed of two 

 brown and one yellow lines), a very narrow yellow strij)e, and then 

 heavy brown blotches which cover the sides. A pale postclitellial ring 

 is usually well defined and complete. 



In the posterior region the blotches are large, well defined, irregular, 

 and assymetrical, and not distinctly metameric in arrangement. A 

 tendency is manifest on the ventral surface to break up into a median 

 series of confluent blotches, on each side of which is a narrow, ill- 



