138 



restriction here adopted, the family comprises 7 distinct genera, viz., Anomalocera 

 Templeton, Lalxliccrn Lubbock, Pontclla Dana, Poutcl/<>j>i* Brady, Irettopsis Clans, 

 Monops Lubbock, PoiitcUina Dana and Calanopia Dana. Of these genera, only 

 the first 2 are represented in the fauna of Norway ; the others are characteristic 

 of the tropical parts of the oceans. 



Gen. 26. AllOmalOCera, Templeton, 1837. 



Svn : Trrnceus, Goodsir. 

 Pontia, Kroyer (part). 



Generic Character*. Body comparatively slender, with the anterior divi- 

 sion oblong in form. Cephalosome with distinct lateral hooks, rostrum very strong, 

 with the rami abruptly defiexed and acute at the tip. Last segment of metasome 

 well defined from the preceding one, and having the lateral lobes in female tri- 

 angularly pointed, in male conspicuously asymmetrical. Urosome in female con- 

 sisting of 3, in male of 5 segments ; caudal rami more slender in male than in 

 female, in the latter conspicuously asymmetrical. Dorsal eyes well developed and 

 of the same appearance in both sexes, each with 2 cuticular lenses ; ventral eye 

 in male enormously developed, club-shaped. Anterior antennae not very elongated, 

 consisting in female of 21 articulations; right antenna of male greatly swollen 

 in the middle. Posterior antenna with the inner ramus well defined from the 

 basal part, outer very small, 5-articulate. Mandibles with 7 denticles on the 

 cutting edge, the outer 2 claw-shaped, palp rather robust. Maxillae with the 

 proximal appendicular lobe much larger than the distal one. Maxillipeds exhib- 

 iting the structure characteristic of the family. First pair of legs with the inner 

 ramus 3-articulate. Last pair of legs in female with the rami very unequal, the 

 outer one slender, biarticulate, inner very small, bidentate at the tip ; right leg 

 in male with the chela not very strong and having both the dactylus and thumb 

 obtuse at the tip. 



Remarks. This genus was established by Templeton as early as the 

 year 1837. The genus Irenfpti* of Goodsir is identical with that of Templeton. 

 It is nearly related to the typical genus PonteUa of Dana, differing however 

 rather materially in some points, e. g. in the presence of 2 pairs of dorsal 

 eye-lenses, the comparatively short anterior antennae, and the structure of the 

 last pair of legs in both sexes. We know at present of only a single species, 

 to be described below. 



