696 ME. H. G. JACKSON ON THE 



processes blunt and but little produced ; accessory processes 

 almost obsolete. Mouth-farts : 2nd maxilla without any trace of 

 division into two lobes; without hairy bristles on inner side. 

 Maxillipede indistinctly divided into five segments. Perceopods 

 very slender, but otherwise typical in form. The Uropods were not 

 attached to any specimen, but a separate appendage was 12 mm. 

 in length, the base being 3 mm. and the rami exceedingly long 

 and slender. They are stated by Budde-Lund to be longer than 

 the body. 



Distribution. S. Africa, " e ' Laudana ' exampla pauca in museo 

 Simon asservantur " (Budde-Limd). 



Although the material from which this species was made is 

 poor, there is no doubt, I think, that it is a good one. Collinge, 

 (1920), who had only Budde-Lund's short description to guide him, 

 discussing the point, suggests that it is a " young form of some 

 species," admitting, however, that young specimens have, as a rule 

 short antennse, whereas the gracilipes is notable for the great 

 length of the antennae. He seems to overlook the quite extra- 

 ordinary length of the uropods. Dana (1852) identified provision- 

 ally as L. ehrenbergii Brandt, specimens found at Madeira. His 

 description and figures of these specimens apply to L. gracilipes in 

 every particular but size and locality. The size he gives as 

 between 17 mm. to 19 mm. long, and 7 mm. to 8 mm. broad- 

 more than double the dimensions of Budde-Lund's specimens. 

 The locality is N.W. Africa as against S. Africa of the 

 gracilipes. It seems as if Dana would have been justified in 

 creating a new species for the reception of the specimens, but as 

 he did not do so, they must be identified with L. gracilipes if 

 further material should prove them to be the same. I do not 

 think they should be so identified in the present state of our 

 knowledge. 



10. LiGiA HAWAiENSis Dana. (PI. II. fig. 16.) 



Ligia hawaiensis Dana (1852), p. 740. 



Ligia hatoaiensis Budde-Lund (1885), p. 271. 



Ligia vitiensis Stebbing (1900), p. 646. 



Male specimen described. 



Length 19 "5 mm. Breadth 7"5 mm. 



Surface minutely granular. Eyes large and quadrangular and 

 separated by less than their horizontal length. Antennce very 

 long and slender ; flagellum reaching as far back as hind border 

 of 3rd abdominal somite ; peduncle half-way across 3rd thoracic 

 somite ; flagellum with 30 long segments, each about twice as 

 long as it is broad. The antennse in the female reach to the 

 hind border of the thorax, and the flagellum has about 26 segments. 

 Coxal plates scarcely, if at all, separated. In the female, deep 

 grooves mark the distinction on the 2nd and 3rd thoracic somites, 

 bvit indications are absent or exceedingly faint on other somites. 

 Abdomen abruptly contracted . Telson triangulate ; median process 



