\ 



Polycliacta. 265 



(a) H. f^pinosa, Y^w fullo} 



(PI. XLIIT., figs. 1 and 4, and 6-7.) 



Elytra parce vel baud fimbriata, spinulis conicis, interduni prope marginem 

 posticiim verrucis crassioribus circa III muiiita. 



The minute conical acuminate spines may be localised in definite 

 patches either in the outer portion or on the anterior portion of tlie 

 elytra. The most anterior spinules may be quite low and blunt, and 

 sometimes all of them have this character (PI. XLIII., fig. 7). One 

 specimeii which I refer to this variety after attentive consideration 

 deserves special mention. For a long time I thought it was a new 

 species of Lagisca, but now regard it as a sub-variety of the form 

 under consideration, and shall refer to it simply as v. lagiscoides.'^ 

 The elytra of this specimen are destitute of marginal fimbriae and 

 sub-marginal verrucae,^ but possess extra-marginal spinules like those 

 of Lagisca magellanica, Mclnt. (fig. 6). There are forty segments, of 

 which the last six project behind the elytra ; the lagiscoid appearance 

 of free segments behind the elytra will obviously vary according to 

 the condition of regeneration of the posterior end, and also according 

 to the state of general protraction of the body. This specimen 

 measures 49 mm. in length and 15 mm. over the setae ; it was taken 

 outside Cape Adare, 13th November, 1899, in 8^ fathoms. 



(yS) H. sptnosa, var, ti/jncu. 

 (I'l. XLI., figs. 1-3, and I'l. XLIII., fig. 2.) 



Elytra prope marginem posticum vel ubique verrucis obtusis muuita, margine 

 exteruo fiuibriato. 



A comparison of the figures on PL XLI. with Kinberg's type- 

 figures,* will convince as to the specific identity of the specimens 

 depicted.'^ The elytra are marked by the presence of sub-marginal 

 pustules {^innulae conicae of Kinberg) along the hinder border and 



^ Polynoe fiiUo, Grube, 1877, Monatsber. Ah. Berlin, p. 515 ; Lagisca 

 ■magellanica, Mcintosh, 1885, 'CVta/^eHy/t)- ' Eep., XII., p. 82. Both of these are 

 included by Eblers (1897) in the synonymy of H. spinosa. 



' The full designation would be //. spinosa, var. fullo, sub-var. lagisccides, but 

 it is not yet known whether the establishment of sub-varieties is capable of being 

 carried on with profit in Polychaete taxonomy. 



^ These are small wart-like vesicles sometimes present in this variety, but 

 much more abundant in the typical variety. 



* ' Eugen. Eesa.,' Taf. VI., fig. 31. 



^ Except that Kinberg found " appendices omnes lobi cephalici laeves " — 

 " vielleicht aber nur in Folge des schlechten Erhaltungszustandes " (Eblers, 1897, 

 Hamburg, p. 14). 



