446 0- 0. SARS, 



The last pair of uropoda (fig. 1 3) extend a little beyond the others, and 

 have the outer ramus almost twice as long as the basal part, being other- 

 wise of the usual structure. 



The telsou (fig. 14) is somewhat less broad than in the preceding species, 

 and has the cleft narrower. Each of the two halves carries on the tip 2 

 slender spinules, and has, moreover, exteriorly, at some distance from the 

 tip, a delicate hair. 



Occurrence. — Several specimens of this form, males and females, were 

 collected by Mr. Maximo wicz in the bay Karabugas. 



11. Amathillina pusilla, G. 0. Sars, n. sp. 



(PI. 5, tigs. 15—25). 



Specific Characters. — Body, especially of female, very short and stout, 

 with the last 2 segments of mesosome, and those of metasome elevated to 

 very pi'ominent dorsal expansions, the hindmost being rounded, the other 

 4 triangularly jjoiuted. (!ephalou comparatively larger than in the other 

 species, but of a similar form. Coxal plates comparatively small. Eyes oval 

 reniform. Superior antennae very slender and elongated, being twice as long 

 as the inferior, accessory ai)i)endage very snuxU. Gnathopoda in female 

 somewhat uuecpial, the jjropodos of tlie anterior ones being considerably 

 larger tliau that of the posterior, which is very narrow, oblong ({uadrangu- 

 lar; those of male powerfully develoi)e(l and nearly equal-sized. Pereiopuda 

 rather strongly built, and comparatively more elongated than in A. Maxi- 

 motvicsi, basal joint of penultimate pair not j)articHlarly broad, that of last 

 pair obliquely expanded, forming a narrowly-rounded projecting lobe at the 

 infero-posteal corner. Last pair of ui'opoda, rather sliort, outer ramus with 

 no lateral spines. Telson with the cleft very narrow, lateral halves obtusely 

 truncated at the tip, and provided with only a single very minute apical 

 sjjinule. Length of adult female 4 mm. 



Remarks. — The present new species is nearly allied to A. cristata. of 

 which I formerly believed it to be only a variety. Having, however, sub- 

 mitted the animal in botli sexes to a careful anatomical examination, I am 

 now of the ui)iuion that this form ought to be regarded as specifically dis- 

 tinct, since it differs conspicuously from the type species, not only in its 

 very inferior size, but also in some structural details mentioned in the 

 above diagnosis. 



Description. — The length of fully adult, ovigerous females scarcely 

 exceeds 4 mm., and this form is accordingly much the smallest of the 5 

 species as yet known. 



•^ua.-MaT. crp. 276. 26 



