262 



Colour not yet ascertained. 



Length of adult female 0.48 mm. 



Remarks. -The present form is of about the same size as L. Nordgaardi, 

 but is easily distinguished from that species by the distinctly 7-articulate anterior 

 antennae and the peculiar shape of the last pair of legs. The general form of 

 the body is also somewhat different. 



Occurrence. Some few specimens of this form, all of the female sex, were 

 picked up from samples taken at Ris0r and Lillesand, south coast of Norway. 



173. Laophonte nana, G. 0. Sars, n. sp. 



(PI. CLXXXTI). 



Specific Characters. Female. Body very short and stout, somewhat de- 

 pressed in front and rapidly tapering behind, almost pyriform in shape. Cephalic 

 segment large and broad, with the rostral projection obtusely triangular in shape. 

 Eye very large and light red. Urosome much shorter than the anterior division, 

 and having the lateral expansions of the segments rather slight. Caudal rami 

 short, not much longer than they are broad, and scarcely at all divergent, middle 

 apical seta about half the length of the body. Anterior antennae rather stout and 

 gradually tapering distally, being only composed of 6 articulations, 2nd joint the 

 largest and without any projection behind. Posterior antennae with the outer 

 ramus extremely small and rudimentary, conical in form, with a single apical seta 

 and a minute lateral hair. 1st pair of legs less slender than usual, outer ramus 

 biarticulate and about half the length of the proximal joint of the inner. Natatory 

 legs well developed and of normal structure, except that the terminal joint of the 

 outer ramus in the 4th pair is shortened and armed with only 3 spines. Last 

 pair of legs with the distal joint small, sub-truncate at the tip, and provided with 

 5 setae, the 2 outermost ones closely juxtaposed; inner expansion of proximal joint 

 rather large and somewhat curved, extending nearly as far as the distal joint, 

 marginal setae 4 in number, the outermost but one the longest, digitiform process 

 outside this joint short and broad. Ovisac large, rounded oval in form. 



Male with the 2nd pair of legs considerably larger than in female, inner 

 ramus very slender, with only 3 setae on the distal joint, the innermost one short, 

 spiniform. 3rd pair of legs very unlike those in female, outer ramus exceedingly 

 strong, with the setae of the inner edge spiniform, inner ramus distinctly 3-articu- 

 late, spiniform projection of middle joint of a rather peculiar appearance, being 

 sigmoid in form and abruptly bent outwards. Last pair of legs extremely small, 

 distal joint with only 3 setae, proximal joint without any expansion inside. 



