VI 110 Carl Zimmer. 



entire terminating in a strong spine, apex obtusely rounded and alniost imperceptibiy 

 extending beyoiid tlie outer terminal spine. Mouth parts of the usuai type found 

 in the genus.- First thoracic legs very mucli as described for P. calloplura, with, 

 however, the carpiis shorter than the merus, propodus short, nail well developod, 

 distinct and longer than the propodus; setae as in P. calloplura. Second thoracic 

 legs much as in P. roseum; carpus shorter than merus: the propodus much better 

 developod than in either P. calloplura or P. Kempi, and densely armed with both 

 simple and plumose setae; nail distinctly present but small, shorter than the pro- 

 podus and hidden among the setae of the propodus. Exopods of all the thoracic 

 limbs well developed, outer distal corner of the basal Joint slightly acuminate, 

 flagelliform part of eleven joints. Pleopods of the female of usual structure, those 

 of the male well developed, biramous, natatory, of the type met with in P. roseum; 

 inner branch of the first pair with a Single long seta at its tip, and three or four 

 on its inner edge, lateral lobe well developod and tipped with two or three long 

 setae. Telson as long as the last segment of the pleon, base nearly three times 

 as broad as apex; apex broadly rounded, entire, armed with a pair of median 

 setae and four pairs of strong simple spines, the innermost pair the longest, about 

 one-quarter the length of the telson, each succeeding pair shorter than its inner 

 neighbour; lateral margins unarmed. Inner uropods once and a quarter, outer 

 uropods once and a half the length of the telson; no spine at the base of the 

 inner uropod. Length of the type female 8 mm, of the type male (adult) 

 6,5 mm." (1. c.) 



Verbreitung: Bisher nur an den irischen Gewässern von 200 — 372 F. 

 Tiefe bekannt. 



66. Pseudomma theeli Ohlin. 



Fig 220-222. 



1901. Pseudomma theeli Ohlin, Bih. Svenska Ak., v. 27, Afd. 4, Nr. 8, p. 78, 



79, fig. 5. 



„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. Antennai 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 what is the 

 case in the other kiiown species, at the apex of the scale. In this respect it conies 

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

 Pseudomma australe, in which this spine is situated very near the base of the 

 scale. Pseudomma Theeli and Pseudomma australe thus rcpresent the. extreme 

 poies in regard to the relative length of the outer margin as compared with the 

 inner setous one, the other species being interniediate links in the series. 



