16 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



Odontodactylus hawaiiensis, new species 



Figure 4; Plate 1 

 Odontodactylus japonicus. — Bigelow, 1931, p. 145, pi. 1 (fig. 1). — Edmondson, 

 1946, p. 243. [Not 0. japonicus (de Haan, 1844).] 



Holotype. — lcf, 107.0; off coast of Maui Is., Hawaiian lis.; 

 173-276 m; Albatross Sta. 4098; July 23, 1902; USNM 64861. 



Paratype. — 19, 29.4; off south coast of Molokai Is., Hawaiian 

 lis.; 109-116 m; Albatross Sta. 3845; Apr. 8, 1902; USNM 64863. 



Other material. — lcf, 32.2; off northeast coast of Hawaii Is., 

 Hawaiian lis.; 151-206 m; Albatross Sta. 4062; July 18, 1902; USNM 

 64862. 



Description. — Eye large, cornea longer than broad, set obliquely 

 on short stalk; ocular scales oblique, appressed along midline; eyes 

 not extending to end of second segment of antennular peduncle. 



Antennular peduncle short, about two-thirds as long as carapace. 



Antennal scale broad, ovate, completely setose, anterior setae 

 smaller than posterior; scale five-sixths length of carapace. 



Rostral plate short, triangular, with acute, deflexed apex; plate 

 anteriorly sulcate along midline; apex of plate extending to posterior 

 margin of ocular scales. 



Dactylus of raptorial claw with 7-8 teeth. 



Abdomen smooth, second to fifth somites with anterolateral pit 

 and shallow groove posterior to each pit, grooves increasing in size 

 posteriorly; groove of fifth somite with prominent, almost carinate 

 margins; fourth and fifth somites each with posterolateral spinules; 

 sixth somite with faintly indicated lobe in front of articulation of 

 uropod; sixth somite with 3 pairs of primary carinae, submedians, 

 intermediates, and laterals armed with at most apical tubercles in 

 holotype; submedians each with posteriorly reflected carina, not 

 extending to posterior margin; broad tubercle present on each side 

 between intermediate and lateral carinae. 



Telson broader than long, with full complement of carinae; 2 pairs 

 of accessory medians present, outer irregular; submedians faintly 

 suppressed at base of marginal teeth, extending almost to anterior 

 margin of telson; submedian tooth and first intermediate denticle 

 with short dorsal carina, carina of denticle not extending anteriorly 

 past base of denticle; short intermediate, lateral, and marginal 

 carinae present, laterals extending obliquely to apex of tooth; low 

 anterior swellings present lateral to outer accessory median and 

 submedian carinae. 



Outer margin of proximal segment of uropodal exopod with 11-12 

 broad, tapering, upturned spines, last extending to or beyond mid- 

 length of distal segment; distal segment of uropod more than half as 

 long as proximal. 



