10 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



Discussion. — Only two species of Odontodactylus , 0. scyllarus 

 (Linnaeus) and 0. hawaiiensis, new species, have appressed ocular 

 scales as well as two pairs of accessory median carinae on the telson. 

 Both of these have at least the fourth and fifth abdominal somites 

 armed posterolaterally and neither has a dorsal carina on the telson 

 extending anteriorly from the inner intermediate denticle. In 

 addition, 0. scyllarus has less than five teeth on the claw; 0. hawaii- 

 ensis agrees with 0. japonicus in having more than five. 0. breviros- 

 tris (Miers) and 0. cultrijer (White) both differ from 0. japonicus in 

 having separate ocular scales and only one pair of accessory median 

 carinae on the telson. 



Komai (1927) noted that some young specimens of 0. japonicus 

 obtained from fish stomach contents could not be sexed but morpho- 

 logically resembled adults. He further noted that two specimens had 

 posterolateral spines on the fourth and fifth abdominal somites. 

 Inasmuch as 0. japonicus completely lacks these spines, Komai's 

 specimens must be referred to 0. brevirostris. The adults reported 

 by Komai are probably 0. japonicus. 



No sexual dimorphism of morphological characters was noted in 

 the specimens reported herein. Komai (1922) gave an account of 

 dimorphism in color pattern and commented on an aberrant male 

 with a pattern approaching that of a female. 



Distribution. — 0. japonicus has been recorded from numerous 

 localities around Japan and China, from three localities in Australia 

 [Broome (Alexander, 1916) and Shark Bay or Exmouth Gulf, Western 

 Australia (Stephenson, 1962), and off Wistari Reef, Capricorn Group, 

 Queensland (Stephenson, I960)], and from two localities in the Indian 

 Ocean, south of the Seychelles (Borradaile, 1907) and the present 

 record from Madagascar, in shallow water to 100 m. 



Odontodactylus scyllarus (Linnaeus, 1758) 



Figure 3 



Cancer Scyllarus Linnaeus, 1758, p. 633. 



Cancer scyllarus. — Linnaeus, 1767, p. 1054. — Holthuis, 1951, p. 86 [discussion]. — 



Hemming, 1954, p. 158. — Holthuis and Manning, 1964, p. 139. 

 Gonodaclylus scyllarus. — Latreille, 1828, p. 473. — H. Milne-Edwards, 1837, p. 



529.— Miers, 1880, p. 115; 1880a, p. 459.— Bigelow, 1893, p. 100 [discussion]. 

 Gonodaclylus Bleeherii A. Milne-Edwards, 1868, footnote p. 65. — Miers, 1880, 



p. 118. 

 Gonodaclylus elegans Miers, 1884, p. 566, pi. 52 (figs, b, b). 

 Odontodactylus bleekerii. — Bigelow, 1894, p. 496 [key]. 



Odontodactylus elegans. — Bigelow, 1894, p. 496 [key]. — Kemp, 1913, p. 139. 

 Odontodactylus scyllarus. — Bigelow, 1894, p. 496. — Kemp, 1913, p. 135 [older 



references]. — Bouvier, 1915, p. 312. — Sunier, 1918, p. 11. — Kemp and Chopra, 



1921, p. 297 [listed].— Hansen, 1921, p. 79; 1926, pp. 22, 42 [larvae], pi. 2 (fig. 



6). — Komai, Akatsuka, and Ikari, 1927, p. 295 [listed]. — Komai and Ikari, 



