97 



Remarks The species belonging to tliis genus may be easily recognized 

 by their unusually short ;uid compact body, and the very slender anterior antenna; 

 and caudal rami. The name Halitcmora was proposed by Dr. Giesbrecht, to 

 distinguish the marine spccir-s of the old genus Temora from those occurring in 

 brackish and fresh water, to which the name Eurytemora was given, both these 

 groups being at that time considered as only subdivisions (subgenera). As, however, 

 their generic value is now generally accepted, the name Halitemora has been 

 replaced by the original name Temora, whereas the 2nd name has been retained, 

 to designate a distinct genus, which will be treated of farther on. We know at 

 present of 4 or 5 species belonging 'to the present genus, all of which are true 

 marine species. One of these belongs to the fauna of Norway, and will be 

 described below. 



41. Temora longieornis (Mailer). 



(PL LXV & LXVI). 

 f'i/tif>ps longicornis, 0. Fr. Miiller. Entomostraca. p. 115. 



Syn : Temora finmarchica, Bail d. 

 Diaptomuff longicaudatufi, Lnubock. 

 Halitemora longicornis, Giesbrecht. 



Specific Characters. Female. Anterior division of body, seen dorsally, 

 broadly oval in form, greatest width attaining fully half the length, and occurring 

 quite in front, across the middle of the cephalosome, anterior extremity obtusely 

 rounded, posterior gradually contracted; seen laterally, boldly vaulted above, 

 greatest curvature about in the middle. Cephalosome fully as long as the meta- 

 some, front but very slightly produced below, dorsal gibbosity small, but distinct. 

 Lateral parts of last segment of metasome rounded off. Urosome (comprising the 

 caudal rami) somewhat exceeding half the length of the anterior division, genital 

 and anal segments of about equal size, middle segment the smallest. Caudal 

 rami perfectly symmetrical and very narrow, linear, more than twice as long as 

 the anal segment, inner edge finely ciliated, outer edge exhibiting near the base 

 a small ledge ; apical setae unusually short, the innermost but one much the largest 

 and having its base conspicuously dilated, seta of the outer edge occurring at 

 rather a long distance from the others and very delicate, being scarcely at all 

 ciliated. Anterior antennae, when reflexed, reaching about to the base of the caudal 

 rami. Last pair of legs with the terminal joint about the length of the other 2 

 combined, and narrow oblong in form, projecting at the end into 4 about equal 



14 Crustacea. 



