Die nordischen Seliizopoden. \'l ^7 



inner ranii bifurcating' iiito two iiarrow sub-eqnai processcs, witliont any con- 

 spicuons basal enlargement. Telson snb-triant^nlar, abont as long as tlie sixtli 

 Segment of pleon, apex narrowly trimcate, beset witii a central pair of setae and 

 a pair of spines on either side. The inner spines are tliree or niore tiiiies as 

 long as the unter and about as long as the telson. Lateral niargins entirc, except 

 distally, where tliere are about tliree small spines on either side. Outer uropods 

 with the extremities somewhat squarely truncate. inner uropods but iittle shorter 

 tlian the outer, arnied inferiorly with a Single spine near the posterior end of the 

 otocyst. Colouration not noted vvheii the specimens were taken. One retains a 

 crinison spot on the cephalic part of the carapace. Lengtli of inatine male and 

 fcmale 9 mm." (1. c). 



Verbreitung: Bisher nur aus den irischen Gewässern bekannt. Walir- 

 scheinlicii eine Bodenfonu aus 200 — 400 F. Tiefe. 



56. Dactylerylhrops bitligitata Tattersall. 



1907. Dactylerythrops bidigitata Tattersall, Ann. iiat. hist. ser. 7 v. 19, 



p. 109—111. 



„Carapace covering all the thoracic Segments; cervical sulcus well marked; 

 produccd in front into a broadly rounded obtuse rostriun which reaclies to about the 

 ccntre of the eyes; nntero-lateral corners rouniled; emarginate on its posterior border. 



Pleon longer than the carapace; the first segment one and a half times as 

 long as the second, which is subequal to the third and foiirtli; fifth segment slightly 

 longer tiian the fourth, sixth segment twice as long as the fifth.' 



Eyes small with their basal parts covered by the rostrnm ; as far as can be 

 seen, joined to each other at the base by a meiubranous integument such as is 

 described for D. dactylops; the outer distal corner produced into a rather long 

 digitale and flexible process; a shorler and firmer process on the inner and upper 

 face of the eye, which a raised ridge connects to the main parts of the eye, so 

 that the wliole organ is triangulär in cross-section and not flat; Visual Clements 

 much more numerous than in D. dactylops, confined to a triangulär area on 

 the outer part of the eye at the base of the outer process; pigment confined to 

 the Visual elements, pale puri^lish pink in freshly preserved specimens. 



Anteiuiular pcduncle rather sliort, with the third Joint a Iittle longer and 

 very much stouter than the first and more swollen in the luale than in the feiuale; 

 second Joint small; male appendage well developed, but only slightly hirsute, as 

 the specimen is still inuuature. 



Antennal peduncle shorter than the antennular and having the second Joint 

 slightly langer than the subequal first and third joints. 



Antennal Scale almost twice the length of the antennular pcduncle; about 

 four to four and a half times as long as broad; outer margin entire and ending 



Nord. Plankton. '^' ' 



