no. 3606 ODONTODACTYLUS — MANNING 9 



somites broadly rounded posteriorly, process of seventh somite larger 

 than that of sixth; ventral keel on eighth thoracic somite broadly 

 rounded, inclined posteriorly. 



Abdominal somites smooth, strongly convex; longitudinal sulcus 

 originating from anterolateral pit present on fifth somite, incon- 

 spicuous if present on fourth; posterolateral angles of first 5 somites 

 rounded; sixth somite with 6 pairs of posterior spines (obsolete in 

 large specimens), submedian carinae recurved posteriorly; anterior 

 "knobs" present between intermediate and lateral carinae; at most 

 a blunt lobe present in front of articulation of uropod; ventral surface 

 of sixth somite with posterior margin concave along midline. 



Telson slightly broader than long, greatest width at base, orna- 

 mented with carinae as follows: (1) median carina with short apical 

 spine; (2) 2 pairs of accessory median carinae, inner much more 

 prominent; (3) 1 pair of long submedians, anterior portions usually 

 connected to posterior; (4) 1 pair of long curved carinae, extending 

 from inner intermediate denticle almost to anterior margin of telson; 

 (5) 1 pair of short intermediate carinae, each on tooth; (6) 1 pair of 

 short lateral carinae, extending toward apex of the lateral tooth and 

 fusing with the marginal carina; and (7) 1 pair of marginal carinae. 



Outer margin of proximal segment of uropodal exopod with 10-12 

 broad, flattened, overlapping spines, last extending slightly beyond 

 end of distal segment; distal 4 or 5 spines spatulate; proximal segment 

 of uropodal exopod less than 1.5 times as long as distal segment; 

 endopod broadly ovate with 2 longitudinal carinae not extending to 

 apex; basal prolongation with outer spine the stronger, extending 

 past proximal segment of exopod but not past endopod. 



Color. — Komai (1922) noted that males are bright salmon red 

 and females are salmon red anteriorly, bluish green posteriorly. None 

 of the present specimens showed any color pattern in preservative. 



Size.— Males, TL 125.0-150.0 mm; females TL 82.2-141-0 mm. 



Measurements and indices for selected specimens of 0. japonicus 

 (de Haan) are as follows: 



