Entomostraca frotn the Scottish Seas. 125 



but there are structural differences which at once distinguisli 

 this ' GoJdseeker ' Calanoid from Amalbqjhora typica^ 

 T. Scott, which it somewhat resembles. Tlie left leg of the 

 fifth pair is elongated and slender, as in the fifth pair of 

 A. typica, and tlie first and second joints are moderately 

 stout, but the second joint is about one and a half limes 

 lunger than the first, while the first and second are together 

 rather less than half the entire length of the leg ; the third 

 joint is very slender and about one and a half times longer 

 than the second ; the fourth joint is scarcely half as long as 

 the tiiird, and becomes somewhat dilated towards the distal 

 end ; the distal half of this joint is hollow on the exteiior 

 edge and assumes a spoon-like form to receive the end joint, 

 which is folded back upon the fourth and is greatly attenuated 

 towards the distal extremity, and terminates in a minute 

 hook ; the end joint bears several minute seta on its inner 

 edge, and a small seta projects from the end of the fourth 

 joint (PI. IV. figs. 15-17). The right branch is very short 

 and reaches slightly beyond the first joint of the left branch ; 

 it consists of five joints, but the three end ones are very 

 small (PI. IV. fig. 15). 



nab. 'Goldseeker' Station 53 (lat. 59° 36' N., long. 

 7° W.) ; depth 1140 metres, August 17th, 1908. A few 

 male specimens only observed. 



RevKirks. — Though the form here described approaches 

 somewhat closely to Arnallophora typica, the structure of the 

 fiftii pair of thoracic legs is decidedly different; the left leg 

 differs not only in the proportional lengths of all the joints, 

 but also in the form and armature of the end joint. 



It may be remembered that Arnallophora typica has been 

 relegated to the genus Xanthocalanus by Dr. Giesbrecht, but 

 though it agrees with that genus in some particulars, as, for 

 example, in the structure of the filth pair of thoracic legs, it 

 differs in other respects, and notably in the armature of the 

 first maxillipeds, which possesses a character distinct from 

 that observed in described species of that genus. In the 

 typical Xanthocalanus (A. agilis, Giesb.) the first maxillpeds 

 are provided with a number of slender sensory filaments, but 

 they have no lai'ge and conspicuous sheaf-like bundle of 

 delicate threads inextricably mixed together as in Arnallo- 

 phora. This genus I therefore retain for the two species 

 mentioned here, viz. Arnallophora typica and A. claviger. 



Neoscolecithrix koehleri, Canu. 



1896. Neoscoleclthrix kcekleri, Canu, Ann, Univ. Lyon, vol. xxvi.. 

 p. 426, pi. xviii. tigs. 1-9. 



