On Fresh-water Entomostraca. 71 



has also been observed by Mr. King, and regarded by him 

 as a species of the genus Diaptomits. But, as no figures 

 or descriptions are given of the 4 species he enumerates, it 

 is impossible to decide to which of them it ought to be 

 referred. 



36. Boeckella minuta, G. O. Sars, n. sp. 

 (PL 8. figs. 5—7). 



Specific Characters. — Body much more slender than 

 in the preceding species, the anterior division exhibiting in 

 female a narrow oblong or almost cylindrical form, with the 

 front obtusely rounded; lateral expansions of last segment 

 less fully developed, not nearly extending to the end of the 

 1st caudal segment, outer lobe short lanceolate, inner tri- 

 angular. Tail nearly as in the preceding species, but with 

 the caudal lamellæ somewhat smaller. Anterior antennæ 

 rather elongated, equalling in length the whole body, except- 

 ing the caudal lamellæ. Last pair of legs in female, with 

 the terminal joint of the outer ramus extremely minute, and 

 only provided with 2 unequal apical spines; those in male of 

 a similar structure to that in the preceding species, but with 

 the inner ramus in both legs simple cylindrical. Body in 

 both sexes highly pellucid and nearly colourless. Length 

 of adult female 1.28 mm. 



Remarks. —This additional new species is easily distin- 

 guishable both from B. triarticidata and robusta, being of 

 very inferior size, and also differing in the much more 

 slender body, the less fully developed lateral expansions of 

 the last pedigerous segment in the female, and in the 

 somewhat deviating structure of the last pair of legs in 

 both sexes. 



