202 



127. Attheyella pygmaea, G. o. Sars. 



ll'l. CX\\h 

 n* j'/li/n in us. <!. <) 



s\n: Altlifi/i'llii <>///'/"/('///. Hnnly. 



<'<liitli-ii;i,,,i,!>ix />'../'. h, riHiKji, I'.ippe. 



>'//, r//'r ('!t>ii-<irtri-s. Female. Body not much elongated. cvlindric Hi' form. 

 'iiiL: only slightly attenuated behind. Rostral projection almost obsolete. Uro- 

 some much shorter than the anterior division, its segments distinctly spinulose at 

 the hind edge ventrally and laterally: last segment shorter than the preceding 

 one. and having the anal opercle rather prominent and edged with about 10 coar-e 

 -pinnies. Caudal rami comparatively short and thick, being scarcely longer than 

 they are broad, and armed, in addition to the seta?, with several small denticles 



. / 7 



both inside and outside, outer edge angularly curved in the middle, inner straight. 

 tip transversely truncated; apical seta3 rather elongated and distinctly spinulose, 

 distal seta of the outer edge attached close to the apex. Anterior antennae short, 

 with the proximal joints rather dilated, terminal part fully as long as the prox- 

 imal one. Posterior antennae with the outer ramus of moderate si/e and distinctly 

 Inarticulate. 1st pair of legs rather short, with the rami subequal in length, the 

 inner one composed of 2 joints only, both of about same length. Natatory legs 

 rather strongly built and of a similar structure to that in . 1. crn.^n. Last pair 

 of legs with the distal joint small, of rounded form, with 5 marginal seta?, the 

 innermost of which is quite short, inner expansion of proximal joint rather large, 

 broadly linguiform and extending beyond the distal joint, maginal seta.- rather 

 unequal ;md (i in number. 



.!/"/< exhibiting the usual sexual differences. 2nd pair of legs somewhat 

 unlike those in female, the outer ramus being comparatively shorter and stouter, 

 with the spines of the outer edge much coarser, inner ramus extending nearly as 

 far as the outer and narrowly exserted at the tip, which carries a single slender 

 seta. Inner ramus of :>rd pair of legs transformed in a similar manner to that 

 in the 2 preceding species, though having only a single apical seta; that of 4th 

 pair exeredin.L'lv -mall and apparently iima rtieulate. with 2 unequal seta- on the 

 tip. La-t pair of legs, as usual, much smaller than in female, with the inner 

 expansion of proximal joint less produced and only provided with 2 unequal 

 -piniforin -et;e. 



t'olour whitish, sometime^ with a slight reddish tinge. 



Length of adult female ii..")2 mm. 



// //"///>. -This is the smallest ol the Norwegian species of the present 

 genus, and is moreover easily recognised by the coarsely spinous anal opercle 



