Die arktischen Schizopoden. 



439 



Fundorte: Be rings -Meer: Tschuktschenhalbinsel und Alaska (Richters 1884). 



Karisches Meer: 51 Faden (Hansen 1886). 



Spitzbergen: Süd- und West-Spitzbergen, 140 Faden (Sars 1879, 1886). 



Norwegen: Varangerfjord, 150 Faden (Sars 1879). 



Grönland: Kl. Karajakfjord, 193 m (Vanhöffen 1898). 



Lawrenze-Golf: Bai von Chaleurs, 50—70 Faden, zwischen Bradellebank und Miscou-Insel, 

 45 Faden (Smith 1879). 



21. Pseudomma parvum Vanhöffen 

 1898 Pseudomma parvum, Vanhöffen, in: v. Drygalski, Grönlandexp., v. 2, p. 199. 



Vanhöffen führt die Art 1. c. an, ohne jedoch eine Beschreibung zu geben. In einer tabellarischen 

 Uebersicht giebt er nur noch folgende Charakteristik: Antennenschuppe: breit, Blatt niedriger als der 

 Enddorn. Schwanzplatte: lang und schmal, abgerundet, 6 Zähne ohne mittlere Schwanzfäden. 



Die Exemplare stammten aus dem Kl. Karajakfjord (West-Grönland) aus einer Tiefe von 193 m. 



22. Pseudomma theeli Ohlin 

 1901 Pseudomma theeli, Ohlin, Bih. Svenska Ak., v. 27, Afd. 4, No. 8, p. 78, 79, fig. 5. 



Beschreibung: „Eye-scales quite coalesced, non serrated, without any trace of a median fissure, 

 seen from above representing an equilateral triangle, the lateral sides of which are somewhat sinuated. 

 Antennal scale relatively much longer than in the other species, five times 

 as long as they are broad, its outer margin terminating, as usual, in a strong 

 spine, which, however, is situated, contrary to vvhat is the case in the other 

 known species, at the apex of the scale. In this respect it comes nearest to 

 Pseudomma Sarsii Willemoes-Suhm, and is farthest remote from Pseudomma 

 austräte, in which this spine is situated very near the base of the scale. 

 Pseudomma Theeli and Pseudomma austräte thus represent the extreme poles in 

 regard to the relative length of the outer margin as compared with the inner 

 setous one, the other species being intermediäre links in the series. 



Telson is also of a very different appearance than in the allied species. 

 It is very long and narrow, with the lateral sides a little sinuated. It is five 

 times as long as it is broad (at the apex). This is subtruncated, armed with 

 10 strong spines, the median ones being as long as the apex is broad. Only 

 three or four very small lateral spines are on each side above the apical 

 ones. I was not able to detect any trace of the median pair of slender plumose setae which occurs in the 

 other species. 



In the general appearance Pseudomma Theeli resembles the type species, viz. Pseudomma roseum. In 

 the structure of the oral parts there are some deviations to be found in the form of the two distal joints 

 of the palp of the mandible, the third one being triangulär, with the apex very broad. The maxillipeds 

 and the first pair of pereiopods, the gnathopods, are also relatively much shorter and thicker than in 

 Pseudomma roseum, as may be seen by comparing my figures with those given by Sars in his „Carcino- 

 logiske Bidrag", I. tab. IV, fig. 11, 12." (Ohlin 1. c.) 



Länge 20 mm. 



Verbreitung: Ost-Grönland, Franz- Josephs -Fjord 120 m (Ohlin 1902). Nur die 2 typischen 

 Exemplare sind bisher bekannt. 



55* 



Fig. 66. Fig. 67. 



Fig. 66. Pseudomma theeli 

 Ohlin. Telson. 



Fig. 67. Pseudomma theeli 

 Ohlin. Antennenschuppe. 



