Die nordischen Schizopoden. VI 99 



Antennular peduncle rather short; about half as long as the antennal scale; 

 basal Joint flattened and broader tlian the other two; second Joint small; third 

 Joint the longest, moderately stoutly built, produced ventrally between the bases 

 of the two flagella into a short process armed with about six strong setae; the 

 whole appendage in lateral view appears curiously contorted. 



Antennal peduncle slightly shorter th^n the antennular peduncle and likewise 

 shligtly concorted in lateral view; rather stout; second Joint the largest. 



Antennal scale almost twice as long as the antennular peduncle; from two 

 and a half to three times as long as broad; outer margin entire, terminating in a 

 strong spine, beyond which the apex of the scale is produced for a length equal 

 to about one-eighth of the total length of the scale; no spine on the basal Joint. 



Mouth-parts and first and second thoracic limbs not differing in any important 

 point from those of the last species. 



Remaining thoracic limbs with the tarsus equal to the merus, three-jointed, 

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

 of the tarsus. 



Exopods of all the thoracis limbs with the outer distal corner of the basal 

 Joint slightly acuminate; flagelliform part of ten joints. 



Incubatory lamellae of the female, two pairs. 



Telson diverging somewhat from the type met with in D. dactylops and 

 D. bidigitata, and shaped almost exactly as in the genus Meterythrops; equal in 

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

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

 narrow truncate apex armed with two spines set close together and equal in length 

 to one twelfth of the length of the telson; median setae 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 mature female 15 mm." (1. c.) 



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

 800 F. Tiefe). 



Gattung Pseudomma G. O. Sars. 



1869. Pseudomma, G. O. Sars, in: Forh. Selsk. Christian. 1869, 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 Außenende einen Endzahn, das Ende ist mehr oder weniger 



VI 7* 



