BEACH YUBA AND MACRURA OF HAWAIIAN ISLANDS. 
861 
Distribution . — Kaiwi Channel, 14 fathoms, station 3469 (type locality); vicinity of Laysan Island, 
20 to 30 fathoms, station 3954; French Frigate Shoal, 14J to 1 1\ fathoms, stations 3968, 3970; vicinity 
of Modu Manu, 20 to 160 fathoms, stations 4147, 4148, 4150, 4158, 4159, 4162. 
I believe this species is distinguished from P. pubescens Dana, de Man, « by the rougher carapace, 
broader front, absence of large spines or teeth from the fore margin of arm (one granule only near the 
proximal end is enlarged). 
Menippe convexa Rathbun. 
(PI. xi, fig. 4.) 
Menippe convexa Rathbun, Proc. U. S. Nat. Mus., XVI, 1893, 239. 
Carapace very convex in both directions, smooth, punctate. Anterior end of mesogastric region 
indicated; epigastric lobes elevated. 
Front a little more than one-fourth width of carapace; lobes very oblique, median sinus V-shaped; 
outer angle a tuberculiform lobe, separated by a groove from the upper margin of orbit. 
Antero-lateral border bluntly rimmed; of the four lobes the first two are very obtusely angled, 
the last two subacutely so, all near their anterior margin; the first is half as long as the second, second 
and third subequal; from the fourth a ridge runs inward on the carapace. 
Chelipeds in female massive, very unequal; arm and wrist almost smooth, coarsely punctate; on 
the hand there is a flattened granulation visible to the naked eye. Inner angle of wrist tuberculiform. 
A large tooth near base of pollex of larger chela. 
Dimensions. — Female, length to the tips of frontal lobes 15.5, width 21, width of front 5.8 mm. 
Known only from the type specimen, a female taken at Honolulu, collector unknown; specimen 
in bad state of preservation. 
Pseudozius caystrus (Adams and White). 
Pseudozius caystrus Alcock, Jour. Asiat. Soc. Bengal, LXVII, 1898, 181. 
Hawaiian Islands, A. Garrett, in Museum of Comparative Zoology. 
Pseudozius inornatus Dana. 
(PI. xi, fig. 1.) 
Pseudozius inornatus Dana, Crust. U. S. Expl. Exped., I, 234, 1852; pi. xm, figs. 7a-7c, 1855. 
Kailua, Hawaiian Islands, A. Garrett, in Museum of Comparative Zoology. 
Hawaiian Islands (Dans% 
In the male the index finger is only twice as long as its breadth at base. 
Length 13.5, width 23.9, width of front, exclusive of orbital angles, 5.3 mm. 
Pseudozius triunguiculatus Borradaile. 
Pseudozius triunguiculatus Borradaile, Fauna and Geogr. Maidive & Laccadive Arch., I, 242, text 
fig. 44, 1902. 
South coast of Molokai, 8 fathoms, station 3834, one ovigerous female lacking the larger cheliped. 
Length 3.8, width 5.2 mm. 
Platyozius lsevis Borradaile. 
(PL xi, fig. 7. ) 
Pseudozius ( Platyozius ) lsevis Borradaile, Fauna & Geogr. Maidive & Laccadive Arch., I, 243, text 
fig. 45, 1902. 
Auau Channel, 28 to 43 fathoms, station 3876; Penguin Bank, 28 to 14 fathoms, station 4034; 
northeast coast of Hawaii, 50 to 63 fathoms, stations 4055 and 4063; vicinity of Modu Manu, 27 to 31 
fathoms, station 4171. 
Several specimens are larger than the type, the largest, a female, measuring 10.4 by 13.2 mm. 
The fronto-orbital region is definitely depressed below the postfrontal surface. Front with a ridge 
i Abh. Senck. naturf. Ges. Frankfurt a. M., XXV, 619, 1902. 
