254 



the end of the caudal segment. Moreover, some well-marked differences are found 

 in the structure of the several appendages, the 1st pair of legs in particular, 

 being very different, exhibiting a similar robust form to that found in Desmosoma 

 armatum. The male is less different from the female, than is usually the case 

 in the species of Eugerda and Desmosoma. In all the specimens examined the 

 inferior antennae were broken off, and I have thus been prevented from examining 

 the structure of these appendages. 



Occurrence. This form was also taken during the Danish Expedition, 

 and in the very same place, where Macrostylis longiremis and Desmosoma angustum 

 occurred. 



Eugerda lateralis (Han sen). 



(Suppl. PI. IV, fig. 1). 

 Desmosoma laterale, Hansen MS. 



Specific Characters. Body of female rather slender and elongated, resembl- 

 ing that of E. tenuimana, though having the posterior division of mesosome less 

 fully developed. Cephalon of the usual form. 1st segment of mesosome well 

 developed, and, like the 2 succeeding ones, having the lateral parts curved anteri- 

 orly and obtusely pointed; 4th segment considerably narrower than the preceding 

 ones, and transversely truncated at the extremity; 5th segment quadrangular in 

 form, nearly twice as broad as it is long, and having the anterior corners obtuse. 

 Caudal segment comparatively large, oval pyriform, with a small tooth-like pro- 

 jection on each side beyond the middle, tip narrowly rounded. Inferior antennae 

 not much elongated, scarcely exceeding in length the cephalon and 2 anterior 

 segments of mesosome combined, flagellum shorter than the peduncle, and com- 

 posed of 6 articulations only. 1st pair of legs very strongly built, with the joints 

 considerably dilated, meral joint with one, carpal joint with 2 very strong spines 

 inside, propodos oblong, tapering d^tally, with a row of very small spinules inside; 

 the 3 succeeding pairs rapidly decreasing in size, carpal joint moderately expanded 

 and carrying inside 4 slender spines, outside 3 bristles. The 3 posterior pairs of 

 legs rather poorly developed, and of a structure similar to that in the 2 preceding 

 species. Uropoda with the outer ramus somewhat larger than in E. coarctata, 

 though scarcely attaining half the length of the inner. Length of adult female 

 about 2 mm. 



Remarks. This is another new species, first recognised as such by Dr. 

 Hansen, and referred by him, like the preceding species, to the genus Desmosoma. 



