16 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



Distribution. — Western Indian Ocean, where it has been recorded 

 from several localities between the Persian Gulf, Mauritius, and 

 Ceylon. Records in the literature include Pearl Banks, Persian Gulf 

 (Kemp and Chopra, 1921); the Seychelle Ids. (Borradaile, 1907; 

 Manning, 1962); Mauritius (Bigelow, 1893, 1894, 1926); Male Atoll 

 and Goifurfehendu Atoll, Maldive Ids. (Lanchester, 1903); and 

 Ceylon (Kemp, 1913). It may be restricted to shallow water. 



I have assumed that records of this species from the Red Sea 

 should be referred to G. lanchesteri; all material from the Red Sea 

 examined by me proved to belong to the latter species. 



Gonodactylus choprai, new species 



Figure 6 



Gonodactylus demani ? espinosus. — Chopra, 1939, p. 176. 

 Gonodactylus demani espinosus. — Ingle, 1963, p. 28, figs. 26, 56. 



Holotype.— 19, 20.4; off Somali Republic; 09°36'N, 50°01'E; 

 Anton Bruun Sta. 9-444; 78-82 m; Dec. 16, 1964; USNM 120275. 



Paratypes.— 6cT, 11.6-16.4; 119, 12.2-19.3; data as in holotype; 

 USNM 120277. 4cf, 11.3-15.0; 29, 14.8-20.8; off Somali Republic; 

 09°35'N, 50°59'E; Anton Bruun Sta. 9-442; 70-80 m; Dec. 16, 1964; 

 USNM 120276. 



Description. — Basal portion of rostral plate with transverse 

 anterior margins, rounded anterolaterally. 



Ocular scales small, erect, round. 



Mandibular palp and 5 epipods present. 



Lateral processes of sixth and seventh thoracic somites rounded, 

 subequal, or process of sixth somite slightly larger. 



Carinae of sixth abdominal somite swollen, unarmed posteriorly 

 except for laterals. 



Telson broader than long, with 3 pairs of marginal teeth, submedian 

 well developed, with movable apices, intermediates poorly formed, 

 laterals barely discernible, position marked by faint indentation on 

 lateral margin; dorsal surface of telson without spinules; median 

 carina inflated (particularly in larger males), tapering posteriorly, 

 flanked laterally by accessory median carinae that fuse posteriorly 

 with median; in larger specimens accessory medians separated from 

 median by a groove or pit on each side; dorsal submedian carinae 

 swollen, not as broad as median; carinae of submedian and inter- 

 mediate teeth not markedly inflated; numerous short submedian 

 denticles present; 2 intermediate denticles present, inner set posterior 

 to outer; 1 or 2 small supplementary spinules on lateral margin 

 posterior to apex of intermediate tooth; lateral denticle absent; 

 marginal teeth without longitudinal ventral carinae. 



