700 MR, H. G. JACKSON ON THE 



iiagellum reaching as far back as hind border of 4th abdominal 

 somite ; peduncle half-way across 3rd thoracic somite. Flagellum 

 with 30 very long and slender segments. Co.val j^T'Oi^tss show no 

 sign of division from terga, but in the female the sutures are 

 strongly mai'ked on the 2nd, 3rd, and 4th thoracic somites. 

 Hinder thoracic somites and free abdominal somites with postero- 

 lateral angles much drawn backwards and very acute. Abdomen 

 not abruptly contracted. Telson triangulate ; median process 

 blunt ; postero-lateral processes acute and drawn out, but not as 

 far back as inner accessory processes. Both accessory processes 

 represented by undulations. Mottth- parts : 2nd maxilla weakly 

 bilobed and without hairy bristles. Maxillipede with five separate 

 joints to the palp. Perceopods typical in form. Uropods 14 mm. 



Distribution^ Hawaiian Islands, Karrai 6000 ft., Oloa 2000 ft. 



Although this species is apparently purely terrestrial, it shows 

 no modification whatever fi-om the typical littor-al Ligiidse. The 

 reasons for removing it from Dollfus's genus are given in the 

 beginning of this paper. 



15. LiGiA NATAiiENSiS Collinge. 



Ligia natalensis Collinge (1920), p. 474. 



Male specimen described. 



Length 10 mm. Breadth 4*5 mm. 



Surface minutely granular, rather smooth. Eyes moderately 

 large and separated by their horizontal length. Antennce ex- 

 ceedingly long and slender ; whole appendage longer than body in 

 male, and as long as body in female ; peduncle reaching as far as 

 hind border of 4tli thoracic somite in male, and half-way across 

 that somite in female. The flagellum has 20-23 long, slender, and 

 distinctly setose segments. Coxal plates show no sign of division 

 from terga, but are faintly marked on 2nd, 3rd, and 4th thoracic 

 somites of female. Abdomen abruptly contracted. Telson arcuate; 

 postero-lateral pi-ocesses only very slightly produced ; the acces- 

 sory processes obsolete. Mouth-parts: 2nd maxilla not divided 

 into two lobes, without hairy bristles on inner side. Maxillipede 

 with 1st and 5th joints of palp separated ; remainder only 

 indicated by deep marginal indentations. Perceopods slender, but 

 of typical form. Uropads : No specimens of this size had uropods 

 attached. In a male specimen 7 mm. in length they measured 

 4 mm. ; a female 10*5 mm. had uropods of 4 mm. 



Distribution. Umklali, Winkle Spruit Beach, South Coast, 

 Natal. 



This species is nearlj'- related to L. gracilipes, but is distinguished 

 from it by the more massive form of body and appendages and the 

 smaller uropods. I am unable to confirm Collinge's observation 

 that the flagella of the antennae of 7 to 9 mm. specimens of nata- 

 lensis have fewer joints than those of gracilipes. In most cases, 

 specimens of that size were as mature in form as larger specimens. 



Figured and described by Collinge (1920). 



