Die nordischen Scliizopoden. VI 99 



Antemiiilar iieduiicle lather shoit; aboiit half as long as tlie aiiteniial scale; 

 basal Joint flattened anil broadcr than tlie otiier two; second Joint sniall; third 

 Joint tlie longest, nioderately stontly biiilt, pioduced ventrally between the bases 

 of tlie two flagella into a short process aniied witli about six strong setse; the 

 whole appendage in lateral view appears cnrionsly contorted. 



Antennal pednncle slightly shorter than the antennular pednncle and likewise 

 shligtly concorted in lateral view; ratlier stout; second Joint the iargest. 



Antennal scale ahiiost twice as long as the antennnlar pednncle; from two 

 and a half to tliree tinies as long as broad ; oiitcr niargin entire, terniinating Ina 

 strong spiiie, beyond wliicli the apex of the scale is prodiiced for a lengili equal 

 to about one-eighth of the total lengtli of the scale; iio spine on the basal Joint. 



Mouth-parts and first and second thoracic linibs not differing in any iniportant 

 point from those of the last species. 



Remaining thoracic linibs with the tarsns eqnal to the nierns, tliree-jointed, 

 the first Joint the longest; nail well developod, biit shorter than tlic last Joint 

 of the tarsus. 



Exopods of all the thoracis linibs with the onter distal coriier of the basal 

 Joint slightly acnniinate; flagelliform part of ten joints. 



Incubatory iamellce of the female, two pairs. 



Telson diverging soniewhat from the type met with in D, dactylops and 

 D. bidigitata, and sliaped alniost exactly as in the geiuis Meterythrops; equal in 

 length to the last segnient of the pleon and twice as long as broad at its base 

 where the margins are soinewhat inflated; margins rapidly converging to a very 

 narrow truncate apex armed with two spines set dose together and eqnal in lengtli 

 to one twelfth of the length of the telson; median seta? absent from the apex; 

 distal half of the lateral margins armed with about nineteen short spines. 



Uropods slender: inner, about one and a half times as long as the telson, 

 without spines on its inner ventral margin; outer, nearly twice as long as the telson. 



Length of a niature female 15 mm." (1. c) 



Verbreitung: Bisher nur aus den irischen Gewässern bekannt (700 bis 

 800 F. Tiefe). 



Gattung Pseudomma O. O. Sars. 

 ISöy. Pseudomma, O. O. Sars, in: Foiii. Selsk. Christian. 1809, p. 154. 



Der Carapax ist vorn gleichmäßig gerundet und hat keine Spur eines Rostral- 

 fortsatzes. Die Augen sind mit einander verwachsen und zu einer^breiten Platte 

 umgebildet, die weder Facetten noch Pigment zeigt. Sie ist meist halbkreisförmig 

 und vorn etwas eingekerbt. Der Stamm der ersten Antennen ist sehr kurz 

 und kräftig, das Endglied am längsten. Die Schuppe der zweiten Antenne hat am 

 sonst unbewehrten Aul5enende einen Eiidzalm, das Ende ist mehr oder weniger 



VI 7* 



