46 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 124 



One of the male specimens from Tulear has two gastropod molluscs 

 attached to the body, a large one on the pleopods and a smaller one 

 on the ventral surface of the eighth thoracic segment. As noted under 

 G. platysoma, commensal gastropods have been reported only for 

 67. chiragra. 



Distribution. — Indo-West Pacific, from the western Indian Ocean 

 to Viet Nam and Australia. Shallow water to 50 fms. 



Gonodactylus falcatus (Forskal, 1775) 



Gonodactylus glabrous. — Kemp, 1913, pp. 167, 197, fig. 2 on p. 170, pi. 9 (fig. 113) 



[older references]. — Barnard, 1950, p. 863, fig. 3f. 

 Gonodactylus falcatus. — Holthuis, 1941, p. 284, fig. 9a. — Serene, 1954, pp. 6, 7, 10, 



11, 42, 77, figs. 8, 13-6, pi. 9.— Stephenson and McNeill, 1955, p. 249.— 



Manning, 1962, p. 4.— Ingle, 1963, p. 29, figs. 28, 57.— Manning, 1965, p. 260; 



1966, p. 109; 1967, p. 102. 



Illustration. — Brooks, 1886, pi. 14 (fig. 5). 



Previous records. — None. 



Material. — 1 9, 21.1; Mayotte Id., Comoro Islands, reef flat; 

 L. S. Kornicker, Sta LK-39; Anton Bruun Cruise 9, IIOE; 24 Novem- 

 ber 1964; USNM. 1 d\ 35.9; 1 9, 22.8; He Europa, off Madagascar; 

 A. Crosnier; MNHNP. 1 6% 63.3; lies Mitsio, northwestern coast of 

 Madagascar; trawl; 26 m; sand; A. Crosnier; June 1959; MNHNP. 

 2 d 1 , 33.8-54.5; 11 9, 37.7-71.6; Sud Mitsio, northwestern coast of 

 Madagascar; trawl; 26 m; sand; A. Crosnier; June 1959; USNM. 

 1 cf, 20.3; Banc de Pracel, western coast of Madagascar; 50 m; 

 muddy sand; A. Crosnier; June 1959; MNHNP. 



Distribution. — Indo-West Pacific region, from Ked Sea and South 

 Africa to Japan. 



Gonodactylus bicarinatus, new species 



Figure 14 



Holotype. — 1 9, 26.7; Nosy B6, Madagascar; intertidal zone; 

 A. Crosnier; October 1959; USNM 124097. 



Description. — Anterior margins of rostral plate straight, antero- 

 lateral angles rounded. 



Ocular scales small, erect. 



Mandibular palp and 5 epipods present. 



Lateral processes of sixth and seventh thoracic somites subtruncate, 

 rounded laterally, subequal. 



Carinae of sixth abdominal somite not markedly inflated, each with 

 apical spine. 



Telson broader than long, with 3 pans of slender, sharp marginal 

 teeth, laterals well developed; dorsal surface of telson with numerous 

 spinules and tubercles, smaller and more abundant on anterior carinae 

 than on carinae of marginal teeth; median carina oval, very inflated, 



