414 Hjalmar Ditlevsen 



As the present species shows a rather great resemblance in 

 essential points to a form described by Moore from Mc Cormick Bay 

 under the name of Lagisca multisetosa, I have thought it best, even 

 though there are distinct differences present, to refer it to this species, 

 the more so as Moore also seems to have had only one, by no 

 means perfect specimen at his disposal. The ditference in size is 

 inconsiderable; Moore's specimen measured 11 mm. (20 anterior seg- 

 ments); the corresponding piece of the present specimen measured 

 ca. 10 mm. The dorsal plates resemble each other, being as Moore 

 writes: "thin, membranous, translucent and fairly adherent". The 

 small, microscopic bodies on the scales seem to be quite the same 

 in both forms, as will appear from a comparison of Moore's figures 

 with mine, hi addition to these small bodies there are in both forms 

 some larger pointed spines, which in the specimen of the Danmark 

 Expedition, however, seem somewhat more prominent than in the 

 species from Mc Cormick Bay; they are pretty well scattered over 

 the whole upper surface of the elytra, most numerous on the hind 

 margin, and the belt running across the scale in its long direction, 

 which Moore describes, is not so distinctly marked here ; the single 

 spines are легу large and give the scale a characteristic appearance, 

 which seems rather different from Moore's form. I may add here, 

 however, that these spines are not so numerous on all the scales, 

 nor so long in proportion to the size of the scale, as in the example 

 I have figured, which is one of the anterior. The "twelve or fifteen 

 prominent soft papillae of various heights and with rounded summits", 

 which Moore mentions and figures in his form, are not at all present 

 in the specimen of the Danmark Expedition. I do not attach much 

 weight to this last feature, however; these papillae in Moore's figure 

 greatly ressemble those that are found in larger or smaller quantity 

 in Harmothoe imbricata and Harmothoe rarispina, which are often 

 quite wanting and occur on the whole so capriciously and in varying 

 forms, that it is a question whether they really belong to the normal 

 animal or are rather pathological formations of some kind or other, 

 possibly of a parasitic origin. 



With regard to the bristles, the resemblance is unmistakable. 

 The remarkable form especially of the tooth under the point of the 

 dorsal bristles, which I have described above, seems to me to speak 

 for the specific identity of the two forms; the condition or relation 

 will be seen distinctly on comparing Moore's and my figures, and 

 Moore also refers to it in his description. He says: "the accessory 

 process far out, running first parallel to the principal point and then 

 diverging froiu it, very slender, sharp-pointed and long". — That 

 Moore calls the dorsal bristles "rather long and slender", whilst I 



