AGASSIZ AND WOODWORTH: VARIATIONS IN EUCOPE. 149 
Fig. 5. Female with five radial canals, one of which forks at the periphery, and 
five very unequally developed genitals. 
Fig. 6. Male with five radial canals, unequally developed genitals, and segments 
of unequal size. 
PLATE VI. 
Fig. 1. Male Eucope with five radial canals, one of which forks above the genitals 
close to the base of the digestive cavity, dividing the disk into six 
different-sized sectors. 
Fig.2. A male Eucope similar to Figure 1, with more fully developed genitals. 
Fig. 8. Young Mnemiopsis Leidyi A. Ag., magnified 3. 
Fig. 4. Doliolum sp. in profile, magnified %. 
Fig. 5. Annellid larva (Aricidea !?), magnified 190, 
Fig. 6. Ectopleura ochracea A. Ag., seen in profile, magnified . 
PLATE VII. 
To illustrate the formation of spurs, branches, and anastomosing canals from the 
sides of the radial canals. 
Fig. 1. Slightly projecting spurs on side of radial canal. 
Figs. 2, 3, 6, 7, and 10 show quite prominent hook-like lateral prolongations from 
the sides of the radial canals. 
Figs. 4, 5, and 9 show forks of the radial canals in Figure 4 above the genitals, in 
Figure 5 below. 
Fig. 4 shows a transverse canal connecting adjoining radial canals. 
Fig. 8 shows a circular canal connecting the radial canals below the base of the 
manubrium. 
PLATE VIII. 
Fig. 1. Marginal sense-bearing tentacle with three otoliths. 
Figs. 2 and 3 show the coalescence of adjoining marginal tentacles, Figure 2 with 
one otolith, Figure 3 with two. 
Figs. 4-18 show the mode of formation of an abnormal basal spur frequently 
seen jutting out from the marginal tentacles, either with or without 
otoliths. 
Figs. 14-17 show the numerical variation of the otoliths in the sense organ of the 
marginal tentacle. 
Fig. 18 shows the coalescence of male genital organs of adjoining radial canals. 
Fig. 19 shows the formation of a radial canal shooting up from the circular canal. 
Fig. 20. An abnormal Eucope with confluent radial canals and ovaries developed 
on the main and the lateral eanal. 
Fig. 21 shows lateral leaf-like expansions of male genital organs which have not as 
yet run together, as in Figure 18. 
