PART 1 garth: pacific oxyrhyncha 31 



Type: Cancer planatus Fabricius, 1787, type of Halicarcinus White 

 by original designation. 



Description: Epistome of considerable length. Antennules uncon- 

 cealed by front. No interantennular septum. Merus and ischium of outer 

 maxillipeds subequal. 



Restricted to the southern hemisphere. The single American species 

 belongs to the antiboreal zone of Ekman and occurs also on certain 

 Antarctic islands. 



Halicarcinus planatus (Fabricius) 

 Plate 1, Figs. 1-2 



^Cancer orbiculus Fabricius, 1775, p. 402; type locality, New Zealand; 

 type questionably in British Museum. (See Remarks below.) 



Cancer planatus Fabricius, 1775, p. 403. 



Leucosia planata, Fabricius, 1798, p. 350. 



Halicarcinus planatus, White, 1846, p. 178, pi. 2, fig. 1. Dana, 1852, 

 p. 385; 1855, atlas, pi. 24, figs. 7a, 7b. Cunningham, 1871, p. 492. 

 Targioni-Tozzetti, 1872a, p. 393; 1872b, p. 465; 1877, p. 176, 

 pl. 10, figs. 4, 4a-f. Miers, 1881, p. 70. Cano, 1888, pp. 164, 176; 

 1889, pp. 94, 98, 249. Pfeffer, 1890, p. 545. Ortmann, 1893, p. 31 ; 

 1911, p. 660. Rathbun, 1898, p. 609; 1910, p. 570; 1925, p. 563, 

 pl. 202, fig. 5 ; pl. 283. Stebbing, 1900, p. 524, pl. 36B ; 1914, p. 271. 

 Lenz, 1902, p. 755. Lagerberg, 1905, p. 25. Doflein and Balss, 1912, 

 p. 35. Porter, 1917, p. 95; 1925, p. 316; 1936a, p. 151; 1936b, 

 p. 337. Garth, 1957, p. 32. 



Liriopea leachii Nicolet, 1849, p. 160; 1854, atlas, pl. 1, figs. 1-lf ; type 

 locality, Chile ; type not extant. 



Liriopea lucasii Nicolet, 1849, p. 161; type locality, Chile; type not 

 extant. 



^Halicarcinus pubescens Dana, 1851c, p. 253; type locality, Eastern 

 Patagonia; type not extant. Milne Edwards, 1853, p. 223. 



^Halicarcinus ovatus, Cano, 1888, pp. 164, 177 (Not H. ovatus Stimp- 

 son, 1858) 



Halicarcinus planatus var. pubescens, Ortmann, 1893, p. 32. 



Type: Holotype not in British Museum, fide Dr. I. Gordon. (See 

 Remarks below) 



Type locality: Tierra del Fuego. 



