282 Sotitheru Cross. 



EXPLANATION OF PLATES. 



Pj.ate XLI. 

 All figures relate to Ilarmothoe spinosa. 



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

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



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

 as sub-marginal verrucae. 



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



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

 parasites. 



Plate XLII. 



Fio-. 1. — Travisia kenjuehnsis from the left side ; the position of the mouth is 

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



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

 the laminated branchia behind the dorsal fascicle, the lateral organ (Seitenorr/an) 

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



Fig. 3. — Malmgrenia 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 third, the second being lost from the specimen. 



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



Fio". 6. — Ereutho anfardica from the left side. 



Plate XLIII. 



Fig. 1. — Tip of ventral seta of B. spinosa, \^v.fuUo, x Zeiss, 4t>. 



Fig. 2. — Tip of ventral seta of K spinosa, var. fypica, x 4d . (The sub-apical 

 denticle is represented by a shoulder.) 



Fig. 3. — Tip of ventral seta of H. crossetensis, var. acuminata, x 4d. 



Fig. 4. — Tip of ventral seta of 77. spinosa, sub- var. lagiscoides, x 3d. (The 

 rows of setulae commence far down as in 3.) 



Fig. 5. — Tip of ventral seta of 77. spinosa, another specimen, 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 of setulae commence high up as in 2, but the bidentation of the tip is obsolete, being 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 II. spinosa, sub-var. lagiscoides, x 3d. 



Fig. 7. — Hamate boss from elytra of a specimen a])parently intermediate between 

 \?a.fidlo and var. typ)ica, X 3d. 



Fig. 8. — Head of II. spinosa (dravra 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. 5. 



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

 acuminata. 



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

 and fimbriae. 



Fig. 11. — Portion of an elytral scabrilla of E. crossetensis (Mclnt.) from the 

 Crozet Islands, showing the lobed tip (var. laciniata). 



