9C AMPniPODA NOllMALTA. 



0. Ampelisca tenuiconiis. 



Anipclisca tenuiconiis, Liljvhury, Ofvers'ujt af Kongl. Vttensk. Akad. 

 Forhandl. 1855. 



** M(de. — Verj' like A. macrocephala, but having a posterior dorsal 

 carina. Superior antenna; attached to the interior lateral part ef 

 the cephalon ; the second joint extending beyond the peduncle 

 of the inferior antenna), a little longer than the first ; the third 

 not distinct from the flageUum, which consists of about eleven 

 joints. Inferior antenna; very long and slender, longer than the 

 body ; the idtimate and penultimate articulations of the peduncle 

 nearly equal ; flageUum consisting of about thirty-five indistinct 

 joints. First pair of gnathopoda ha%-ing the propodos and carpus 

 nearly equal ; second pair having the propodos t"vvice as short as 

 the carpus. First and second pairs of pereiopoda having the meros 

 dilated, but those of the first pair a little the narrower. Posterior 

 pair of pereiopoda having the carpus smaU ; propodos very broad ; 

 dactylos thin and flat ; apex short and unguiform. Posterior pair 

 of pleopoda having the rami long, subulate, twice as long as the 

 peduncle. Telson elongate, nearly linear. 



" Length 6 lines. 



" Rare ; two specimens only ha\ing been taken, one with A, Icevi- 

 gata, and one with A. macrocephala. 



*' Hob. KuJlaberg, Norway." — Liljehory. 



10. Ampelisca laevigata. 



Ampelisca laevigata, LVjcborg, Of vers, af Kongl. Vet. Akad. Forhandl. 

 1855, p. 123. 



" Body fonned as in A. maerocephaJa ; but the superior antennae are 

 at the extreme apex of the cephalon, and not latero-inferior ; 

 in the male the superior antennae reaching beyond the peduncle of 

 the inferior antennae, with a flagellum consisting of about twenty 

 joints, and distinct from the peduncle ; in the female not attaining 

 the second joint of the peduncle of the inferior antennae ; the thii-d 

 joint of the peduncle is not distinct from the flageUum, which 

 consists of about seven joints. The inferior antennae simUar to 

 those of 4- macrocephala, but sUghter and longer ; in the female 

 almost reaching the pleon, in the male nearly the length of the 

 animal ; third joint of the jjeduncle longer than the fomlh ; fla- 

 geUum in the female consisting of about twenty-two joints, in the 

 male of about fifty. Gnathopoda formed as usual. Fii-st and 

 second pairs of pereiopoda ha\-ing the meros more dilated than in 

 A. rnacroccpthala ; posterior pair of pereiopoda having the caii^us 



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