Fig. cm. — Aslerope norvegica G. O. Saks. — 1. Shell seen from Iho side, ^: :^:< X. 2. Shell seen fruni behnv. %: 

 25 X :i Shell seen from the side, cJ: :^2 X. '•. Shell seen from below. S- 25 X. 5. Posterior pari of the right valve 

 seen from inside, §; 160 X. •'. Right first antenna seen from outside, $: 125 X. ". Distal part of this antenna seen 

 from the same side: all the bristles are broken, ?: 312 X. 8. Distal part of this antenna seen from the same side: all 

 the bristles except the a-claw are broken, cj: 312 X. (Figs. 1—5 are drawn from a specimen det.-rmined by Professor 



C. O. Sars.) 



/oolot!. lii.lnis:. Uppsula. Suppl.-ll.l I. '"' 



