ISOPOD GENUS LIGIA. 693 



2nd legs and carpus of 3rd flattened and striated as in oceanica. 

 Uropods 10 mm. 



Distribvjtion. California; San Francisco. (See Richardson (1905) 

 for complete list.) 



Figures in Ilichardson (1905). 



5. LiGiA ciNERASCENS Budde-Lund. (PI. II. fig. 9.) 



Ligia cinerascens Budde-Lund (1885), p. 265. 

 Ligyda cinerascens Richardson (1909), p. 126. 



Male specimen described. 



Length 27 mm. Breadth 12 mm. 



Surface minutely granular, rather smooth. Eyes large and 

 nearly round, separated by their horizontal length or a little less. 

 Antennce moderately long and stout ; flagellum reaching as far 

 back as half-way across the 6th somite ; the peduncle half-way 

 across the 2nd ; flagellum with 25 short and stout segments. 

 Goxal 2)lates faintly indicated on all the thoracic somites of the 

 male and very distinctly in the female. Abdomen not abruptly 

 contracted, Telson broadly triangulate, the median process 

 obtuse ; postero-lateral processes produced to acute points reaching 

 no further backwards than inner accessory processes ; accessory 

 processes slight but sharp. Mouth-parts : 2nd maxilla strongly 

 bilobed, with two small hairy bristles on inner side ; maxillipede 

 with the five joints entirely separate. First verceopod with 

 prominent inner process on propodus in male. Uropods 10 mm. 

 + (rami broken). 



Distribution. Hakodate, Japan ; Manila or Chile. 



This species is nearly related to L. occidenfalis, but differs from 

 it in the telson and the character of the antennae. The segments 

 of these are more numerous in L. cinerascens, but short and squat 

 so that the whole appendage is relatively shorter than in L. occi- 

 denfalis. 



6. Ligia exotica Roux. (PI. II. fig. 10.) 



Ligia dentipes Budde-Lund (1885), p. 268. 

 %Ligia malleata PfefTer (1889), p. 36. 

 Ligia exotica Budde-Lund (19086), p. 303. 



Ligyda exotica Richardson (1905), p. 676 (g. v. for complete 

 synonymy). 



Ligyda exotica Richardson (1909), p. 125. 

 Ligia exotica Budde-Lund (1912), p. 391. 

 Ligia exotica Chilton (1916), p. 462. 



Male specimen described. 



Length 27 mm. Breadth 17 mm. 



Surface moderately roughly granulate. Eyes large and separated 

 by less than their horizontal length. Antennce very long and 

 slender ; flagellum reaching as far back as hind border of 5th 

 abdominal somite, peduncle to hind border of 3rd thoracic somite. 

 Flagellum with 28 or more very long and slender segments. The 



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