336 BUIJLETIN 97, UNITED STATES NATIONAL MUSEUM. 



Carapace mottled and washed with pale, dirty green, dark reddish- 

 brown, and straw-color, with a few orange dots. (Miers.) 



Measurements. — Male (24758), length of carapace 33.3, width of 

 same 35.7 mm. 



Range. — From Costa Kica to Panama. Indo-Pacific region. 



Material examined. — 



Pimta Arenas, Ccsta Rica; Jan. 19, 1907; P. Biolley; 1 female 

 (39091). 



Taboga Island, Panama; May 12, 1911; Meek and Hildebrand; 9 

 males, 8 females (4417G). 



Panama ; Mar. 15, 1888; Albatross; 1 male y. (22110). 



Pulo Midei, Natuna Islands, China Sea; May 23, 1900; Dr. W. L. 

 Abbott; 1 male, 1 female (24758). 



Indian Ocean; long. 90° E., on Equator; February, 1884; Capt. 

 J. E. Lyon, British bark Cashmere; 3 males, 5 females (13911). 



Voyage, Liverpool to Calcutta; Capt. J. R. Lyon, British bark 

 Cashmere; November, 1883; 5 males, 4 females (13912). 



PLAGUSIA CHABRUS (Linnaeus). 



Plate 104. 



Cancer chabrns IvInnaetis, I^Ius. Lud. Ulr., 1764, p. 438 (type-locality, in 



Mari Indico; type not extant). 

 riagusia tomeniosa Milne Edwards, Hist. Nat. Crust., vol. 2, 1S37, p. 92 



(type-locality. Cape of Gootl Hope and Chile; type in Paris Mus.).— 



KuAUSs, Siidafr. Crust., 1843, p. 42, pi. 2, fig. G. 

 Plagvsia capcnsis de Haan, Fauna Jnpon., Crust., 1S35, p. 58 (type-locality, 



Cape of Good Hope; type in Leyden Mus.). 

 riagusia chabrns White, Ann. Mag. Nat. Hist., vol. 17, 184G, p. 497. 

 riagusia gaimardi Milne Edwards, Ann. Sci. Nat., ser. 3, ZooL, vol. 20, 1853. 



p. 178 (type-locality, Tongatabu; type in Paris Mus.). 

 Plagusia chabrns Stebuing, Ana, S. African ]Mus., vol. 6, 1910, p. 322. 



Diagnosis. — Carapace tomentose, almost smooth. Basal joints of 

 legs armed with a spine; merus joints with many spines or teeth on 

 anterior margin. 



Description. — Carapace, chelipeds, legs, and ventral surface of 

 body covered with a short tomentum, and without tubercles, except 

 one behind the orbit, and two or three elongated tubercles near the 

 outer angle of the branchial region. Antero-lateral border armed 

 with four strong, acute teeth, the two anterior larger than the two 

 posterior. Front armed above with two small spines, and with a 

 series of small tubercles or .spines on its anterior margin. An acute 

 tooth on the outer edge of the inner orbital lobe. Epistomc tri- 

 lobate, each lobe dentate. Exognath of outer maxilliped with a 

 flagellum. 



Chelipeds massive in the male, about one and two-thirds times as 

 long as the carapace, coarsely tuberculate, the tubercles arranged in 



