18 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



Etymology. — This species is named for Bruno Chopra, who was 

 the first to record its occurrence. 



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

 all other species of Gonodactylus with small ocular scales by the 

 absence of a fixed distal spine on the ventral surface of the proximal 

 segment of the uropodal exopod. 



In sculpture and proportion of the telson, G. choprai, new species, 

 closely resembles G. chiragra var. segregatus Lanchester, 1903, from 

 the Maldive and Laccadive Ids., and the two forms may be conspecific. 

 Lanchester's figure shows that G. c. var. segregatus has all of the 

 carinae of the last abdominal somite provided with posterior spines, 

 whereas these carinae are unarmed in all of the specimens of G. 

 choprai seen by me. 



Lanchester's specimens apparently came from both shallow reefs 

 and offshore habitats; there is a possibility that his material comprises 

 more than one species. 



Distribution/ — Western Indian Ocean, including off the Somali 

 Republic, the South Arabian coast (Chopra, 1939), and the Red Sea 

 (Chopra, 1939), from moderate depths in 70-82 m. Ingle (1963) 

 reported upon Chopra's material. 



Gonodactylus incipiens Lanchester, 1903 



Figure 7 



Gonodactylus chiragra var. incipiens a Lanchester, 1903, p. 451, pi. 23 (fig. 10) 

 [not incipiens b Lanchester, p. 451]. 



Gonodactylus chiragra var. incipiens. — Tattersall, 1906, p. 167. 



Gonodactylus chiragra var. a incipiens. — Borradaile, 1907, p. 211 [key]. 



Not Gonodactylus chiragra var. incipiens. — Lenz, 1910, p. 571 [= incipiens b ??]. 



?? Gonodactylus chiragra incipiens. — Lenz, 1912, p. 4. 



Gonodactylus chiragra. — Manning, 1966, p. 113 [part; G. c. var. incipiens in dis- 

 cussion on p. 114]. 



Material.— 2d", 13.4-15.3; 49, 15.7-20.0; Ritidian Pt,, Guam 

 Id., Marianna Ids.; R. H. Baker; July 12, 1945; USNM 120285. 1 d\ 

 18.8; channel, Hull Id., Phoenix Ids.; killed with TNT; July 7-17, 

 1939; L. P. Schultz; USNM 120284. 19, 13.0; Fakarava Id., Tuamotu 

 Archipelago; Oct. 13, 1899; Albatross; USNM 120283. 2d 1 , 16.6-18.6; 

 2 9, 21.8-24.2; coral reef at Yirrkala, Arnhem Land, Northern Terri- 

 tory, Australia; Australian Museum-U.S. National Museum Arnhem 

 Land Expedition, Sta. C13-17; Aug. 26, 1948; R. R. Miller; USNM 

 111367. 



Description. — Basal portion of rostral plate with anterior margin 

 sloping posteriorly, rounded anterolaterally. 



Ocular scales small, rounded. 



Mandibular palp and 5 epipods present. 



