6 PROCEEDINGS OF THE NATIONAL MUSEUM Vol. 123 



denticles present; 2 spiniform intermediate denticles present, recessed 

 anteriorly; submedian teeth slender, each with prominent longitudinal 

 carina on ventral surface, carina sharp throughout its length; inter- 

 mediate teeth with shorter ventral carina. 



Basal segment of uropod with at most a faint prominence inside 

 dorsal carina; inner margin of both segments of exopod smooth, 

 nonsetose; endopod with inner margin straight, completely devoid of 

 setae; exopod with fixed distal spine on ventral surface of proximal 

 segment; basal prolongation with spines subequal in length, slender 

 inner spine shorter than outer. 



Color. — In preservative, posterior third of carapace and midline 

 of sixth thoracic and first abdominal somites with rectangular patch 

 of dark chromatophores; patch on carapace with 2 submedian black 

 spots, those on thoracic and abdominal somites each with 1 median 

 black spot. 



Size. — Females only examined. TL 16.5-23.3. Other measure- 

 ments of female holotype, TL 22.3: carapace length 4.4; fifth ab- 

 dominal somite width 3.4; telson length 2.6, width 3.0. 



Etymology. — The species is named for J. K. Henderson, the 

 carcinologist who named G. demanii. 



Discussion. — G. hendersoni, new species, can be distinguished from 

 all other species in the genus by the following combination of char- 

 acters: (1) the rostral plate is angled anterolaterally; (2) the uropodal 

 endopod and inner margin of the exopod are completely devoid of 

 setae; and (3) the submedian and intermediate teeth of the telson 

 are each provided with a sharp ventral carina, Gonodactylus hender- 

 soni, new species, most closely resembles G. demanii but can always be 

 distinguished from that species by the characters listed above. 

 Holthuis (1941) pointed out some of these differences in specimens of 

 both species from Indo-Malaya and the Red Sea. 



The female from Burma differs from the two Hawaiian specimens 

 (fig. 1) in the following features: (1) the anterior margins of the 

 rostral plate slope anteriorly; (2) the telson has fewer spines; (3) the 

 median carina of the telson is more circular but not as high; and 

 (4) the uropodal endopod is noticeably broader. The specimen from 

 Okinawa (fig. 2), although smaller, resembles that from Burma. In 

 other features these specimens agree closely. 



Distribution. — Indo-West Pacific, from the coast of Burma east- 

 ward to Hawaii. Records in the literature: off Savu, Seva, and 

 Ambon anchorage, Indonesia (Hansen, 1926); Pulo Edam, Indonesia 

 (de Man, 1888); Kambang, Koepang, and Tidore, Indonesia (Hol- 

 thuis, 1941); Green Id., Queensland, Australia (Stephenson and 

 McNeill, 1955); Viet Nam (Serene, 1953, 1954); Puerto Galera, 

 Mindoro, Philippine Ids. (Roxas and Estampador, 1930), and Taytay, 



