THE GBAPSOID CRABS OP AMEBICA. 335 



Material examined. 



Hilo, Hawaii; 1901; U. S. Fish Comm.; 1 female (25306). 



Kailua, Hawaii; 1901; U. S. Fish Comm.; 1 female (25305). 



Maui, Hawaiian Islands; R. C. McGregor; 1 male y. (23G94). 



Honolulu, Oahu, Hawaiian Islands; June 8, 1901; U. S. Fish 

 Comm.; 1 female (25304). 



South coast, Oahu, Hawaiian Islands; Lae-o Ka Laau Light, N. 

 35, W. C.I'; 222-498 fathoms; Co. R. brk. Sh.; temp. 49.5 F.; Apr. 

 1, 1902; Sta. 3824; Albatross; 1 j. (29338). 



Laysan, Hawaiian Islands; May, 1902; Albatross; 1 male, 3 fe- 

 males (29337). 



Hawaiian Islands; W. H. Pease; 1 female (cotype of P. oricntalis 

 Stimp.) (2480). 



Port Lloyd, Bonin Islands; U. S. S. Tuscarora; 1 male (5320). 



Koneshine, Osumi, Japan; under rocks in shallow water; T. Urita; 

 1 female (48451). 



Oho Sima, Tokaido coast, Japan; F. Sakamoto; 2 males (1882C). 



Hongkong, China; N. Pacific Exploring Exped.; 2 males (cotypes 

 of P. orientalis Stimpson) (2012). 



Anambas Islands, China Sea; 1899; Dr. W. L. Abbott; 1 male 

 (233G3). 



Atjeh, Sumatra; Capt. Storm; 1 specimen (39157). 



Great Nicobar, Indian Ocean; Mar. 16, 1901; Dr. W. L. Abbott; 

 1 male (25215). 



Egmont Reef, W. Indian Ocean; 1905; H. M. S. Sealark; 1 male 

 (41370). 



PLAGUSIA IMMACULATA Lamarck. 

 Plate 103. 



Plagusia immaculata LAMAKCK, Hist. Nat. Aniin. sans Vert., vol. 5, 1818, p. 



247 (type-locality, la Mcditerrancet Je la crois de VOccan Indicn; type 



In Paris Mus. ) . MIEKS, Ann. Mag. Nat. Hist., ser. 5, vol. 1, 1S78, p. 150 ; 



Challenger Kept., ZooL, vol. 17, 1886, p. 273, pi. 22, fig. 1. 

 Plagusia tubereulata RATHBUN (not Lamarck), Proc. U. S. Nat. Mus., vol. 



21, 1898, p. 605. 



Diagnosis. Carapace very convex, feebly tuberculate; tubercles 

 not fringed with hair. Merus joints of legs with only one fringe 

 of hair, the posterior one, on upper surface. 



Remarks. Laurie 1 treats immaculata as a variety of depressa. 

 The series in the United States National Museum seems to be spe- 

 cifically distinct. The lobe on the coxal joints of the legs is entire, 

 as in depressa tuberculata. 



Color. Pale green, mottled with reddish-brown. Tarsi above 

 dark purplish-brown, with small markings of very pale bluish green. 



1 Ceylon Pearl Oyster Fisheries, pt. 5, 1900, SuppL Kept., No. 40, 1900, p. 429. 



