282 Sonflicyii Cross. 



EXPLANATION OF PLATES. 



Pl.ATK XLI. 



All figures relate to Ilarmothoe spinosa. 



Vvj^. 1. — Anterior end of specimen of 43 mm. and 37 segments. (N.B. — The 

 fimbriae of the elytra are not shown iu the figure.) 



Fig. 2. — Tliroe of the middle segments of another to show extra-marginal as well 

 as sub-marginal verrucae. 



Fig. 3. — Posterior end of a third cxamjile ; total length 22 mm., 37 segments. 



Fig. 4. — Several segments with elytra removed and seen from above, showing 

 parasites. 



Plate XLII. 



Fig. 1. — Travisia her glide nun from the left side ; the position of the mouth is 

 indicated by the dark shading between the first and second setigerous segments. 



Fig. 2. — Portion of lateral body-wall of same showing areolation of the epidermis, 

 the laminated branchia behind tiie dorsal fascicle, the lateral organ (Seitenorf/au) 

 between the dorsal and ventral fascicles and the segmental oritice below. 



Fig. 3. — MahiKjrenia crassicirris. Several segments seen from below showing 

 thickened ventral cirri and pigment markings. 



Fig. 4. — Same. Anterior end. The second elytron on the left side of the figure 

 is really the tlnrd, the second being lost from the specimen. 



Fig. 5. — Head of Fhyllodoce madeirensis with proboscis partially extended. 



Yvi. 6, — Ereutho antarcHca from the left side. 



Plate XLIII. 



Fig. 1. — Tip of ventral seta of H. spinosa, Ynv.fuUo, x Zeiss, 4d. 



Fig. 2. — Tip of ventral seta of H. spinosa, var. typica, x 4d . (The sub-ajiical 

 denticle is represented by a slioulder.) 



I'^ig. 3. — Tip of ventral seta of //. crossetensis, var. acuminata, x 4d. 



Fig. 4. — Tip of ventral seta of //. spinosa, sub-var. lagiscoides, x 3d. (The 

 rows of setulae commence far do\vn as in 3.) 



Fig. 5. — Tip of ventral seta of //. spinosa, another si)ecimen. x 3d. (The rows 

 of setulae commence high up as in 2, but the bidentation of the tip is obsolete, being 

 indicated by a convex limbus or border somewhat resembling No. 3). 



Fig. 6. — Elytral spine of //. spinosa, sub-var. lagiscoides, x 3d. 



Y'yx. 7. — Hamate boss from elytra of a specimen apjiarently intermediate between 

 \a.T.fullo and var. typica, x 3d. 



Fig. 8. — Head of //. spinosa (drawn from specimen dredged oft' Cape Adare in 

 : ix fathoms, December 16th, 1899 ; thirty-eight segments, all elytra, lost ; in this 

 case the tentacular cirri are unequal, in others they are equal) ; same individual 

 as No. "). 



Fig. 9. — Prostomium with tentaculum and antennae of E. crossetensis, var. 

 urumiHata. 



Fig. 10. — Portion of elytral margin of same, showing unequal acuminate spines 

 and fimbriae. 



Fig. 11. — Portion of an elytral scabrilla of U. crossetensis (McTnt.) from the 

 Crozet Islands, *;howing the lobed t\\\ (var. hiciniata). 



