18 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



Color. — 'Almost completely faded in all specimens. The smaller 

 male has traces of a black spot on the uropodal exopod similar to that 

 found in O. brevirostris. 



Size.— Males, TL 32.2-107.0 mm; only known female, TL 29.4 mm. 



Measurements and indices for selected specimens of 0. hawaiiensis, 

 new species, are as follows : 



9 



Total length 29.4 



Carapace length 6.3 



Cornea length - 



Cornea width 2.0 



Antennal scale length - 



Fifth abdominal somite width 6.2 



Telson length 4.0 



Telson width 5.0 



CI 315 



AWCLI 1016 



Uropod P/D 1.48 



Discussion. — 0. hawaiiensis most closely resembles 0. japonicus 

 (de Haan) and was identified with that species by Bigelow (1931). 

 It differs from 0. japonicus as follows: (1) the apex of the rostral 

 plate is acute, sharp, not truncate; (2) the margin of the antennal 

 scale is completely lined with setae; (3) the fourth and fifth abdominal 

 somites are armed posterolateral^ ; and (4) there is no carina on the 

 telson extending anteriorly from the inner intermediate denticle. 

 0. hawaiiensis also resembles 0. brevirostris in general facies, but the 

 latter species has a more rounded rostral plate in the adult, a deep 

 pit between the ocular scales, and but one pair of accessory median 

 carinae on the telson. O. scyllarus and 0. cultrifer both differ from 

 0. hawaiiensis in having less than 5 teeth on the dactylus of the 

 raptorial claw. 



Small specimens of 0. hawaiiensis may have an anterior groove in 

 the rostral plate, as in 0. brevirostris, but even the smallest specimen 

 can be distinguished by the position of the ocular scales. 



Distribution. — Known only from off Hawaii, in depths between 

 109 and 276 m. 



Odontodactylus cultrifer (White, 1850) 



Figure 5 

 Gonodactylus cultrifer White, 1850, p. 96, pi. 16 (figs. 1-2); 1851, p. 422. — Miers, 



1880, p. 117.— Lanchester, 1901, p. 555. 

 Gonodactylus carinifer Pocock, 1893, p. 478, pi. 20b (figs. 4a-b). 

 Odontodactylus carinifer. — Bigelow, 1894, p. 496 [key]. — Kemp, 1913, p. 138. — 



Gravier, 1933, p. 78, figs. 3-5.— Serene, 1937, p. 68 [listed].— Dawydoff, 



1952, p. 145 [discussion].— Serene, 1953, p. 506. 

 Odontodactylus cultrifer. — Bigelow, 1894, p. 496 [key]. — Kemp, 1913, p. 137. — 



Sunier, 1918, p. 11.— Kemp and Chopra, 1921, pp. 297 [listed], 307.— Odhner, 



1923, p. 7. — Hansen, 1926, p. 23 [discussion]. — Stephenson, 1952, p. 10; 



