ISOPOl) GENUS LIGIDIUM. 



831 



Vai^ieiies. 



L. hypnorum, var. cursorium (Budde-Lund). Length 9 mm. 

 Breadth 4 nun. Frontal mnrgin sinuate, median V blunfc 

 and slightly produced. Frontal grooves siinllow. Colouring as 

 in L. hypnornm. Inner process of uropotl base perhaps a little 

 shorter than in L. hypnorum. 



L. hypnorvjin var. atromaculaium Verh. The dark markings 

 make 2 longitudinal bands on the tail in front of the telson. 



L. hypnorum var. melanoce2'>h(da (Koch). Body very convex 

 above; antennal llagellnm 9-12 segments; fourth segment of 

 antenna scarcely longer than the tliird; colour predominantly 

 dark l)rown. 



2, LitauiuM FRAGiLK Budde-Ltuid. (Text-fig. 5.) 



Ligidiuvi fragile Budde-Land (1885), p. 257. 

 Ligklium euxintini Verhoeii' (1918), p. 114. 



Length 7-5 mm. Breadth 3"5 mm. 



Surface smooth and shining. Jleadj. 1^'rontal margin sinuate ; 

 median V moderately sharp; not produced. Transverse groove 

 deep and narrow, and pa,ssing behind eyes ; frontal groove very 

 shallow and joining transverse groove a.brupt]y. Eyes large and 

 pear-shaped. Thorax. 1st somite with lateral depression on each. 



Text-fis;ure 5. 



Ligidium fragile. «, antenna; i, lieiid from front. 



side extending to hind border. On hind border of depression a 

 Itristle group. Coxal plates : sutures faintly marked on last 

 four somites ; slightly drawn backwards on last three somites. 

 Antennal llagelluni reaching back as far as halfway across 3r(l 

 tlioracic somite ; Avith 12-15 segments. Uropods. Inner process 

 of base nearly as long as base ; endopods reaching further back 

 than exopod ; exopod about twice as long as inner process. (I 

 have not seen a complete uropod.) Telson. Sides obtuse-angled 

 and witli slight notch over uropods. 



