no. 3618 GONODACTYLUS — MANNING 23 



elongate, tapering posteriorly, unarmed; accessory median carinae 

 present on distal half or third of median, converging posteriorly 

 with median to form an anchor; submedian carinae interrupted; 

 carinae of intermediate and marginal teeth long, low ; numerous small 

 submedian denticles present; 1 small intermediate denticle present, 

 situated at or posterior to apex of intermediate tooth; ventral surface 

 of submedian teeth lacking longitudinal carina. 



Basal segment of uropod lacking lobe or projection inside of dorsal 

 carina; inner margin of proximal segment and all of distal segment 

 of uropodal exopod with single row of setae; proximal segment of 

 exopod with distal fixed spine under articulation of distal segment; 

 endopod slender, tapered, margin with more than 1 row of slender 

 setae, dorsal setae erect, especially on outer margin ; basal prolongation 

 of uropod produced into 2 spines, outer longer. 



Color.— All specimens faded in preservative; Borradaile noted 

 that his specimen was light green. 



Size. — Only male examined, TL 13.2; females, TL 11.3-45.5. 

 Borradaile's specimen, a male measured 18 mm. Other measure- 

 ments of a female, TL 45.5: carapace length 9.7; fifth abdominal 

 somite width 6.3; telson length 5.7, width 5.7. 



Discussion. — G. espinosus can be distinguished by the shape 

 of its telson, with poorly defined intermediate and lateral marginal 

 teeth, by the presence of several rows of setae on the outer margin 

 of the uropodal endopod with some setae erect, and by the broad 

 lateral process of the sixth thoracic somite. Gonodactylus espinosus 

 shares this latter feature with G. incipiens. 



The setation of the uropod may be reduced in small specimens, 

 but the characteristic erect setae are always present. 



It might be assumed from Borradaile's figure that the carinae 

 of the telson in males are much more tumid than those of females; 

 the telson of a female is figured here. 



Distribution.— Central Pacific Ocean, from Palmyra Id. (Edmond- 

 son, 1923) and Fanning Id., Line Ids.; Canton Island, Phoenix Ids.; 

 Fakarava Id., Tuamotu Archipelago; Bora Bora, Society Ids.; and 

 Rotuma, Fiji Ids. In shallow water, among reef corals in lagoons. 



