49 



349 



as wide and widest near the middle, seventh segment subtiiangular with convex sides. 

 ? abdomen subovate, widest at the sinus between third and fourth segments, all 

 segments distinct. 



Length of tj'pe d* 47 mm., width 7-3 mm. 



Record of specimens. — W. coast of Koh Chang, a little N. of the small 

 islands, 10 fath., mud bottom, dead shells; I. 16; 1Ç ovig. Koh Chang, about 

 1 fath., coral; I. 17; 1?. N. of Koh Kong, 8 fath., mud; I. 23; 2?. Off Koh Kut, 

 6 fath.; I. 26; 2 J* (1 type) 5 Ç (2 ovig.). 15 miles W. of Koh Kut, 30 fath., on 

 Chcetodiadema granulatuni Mortensen; 1 c?. The Sound at Koh Chang, 3 — 5 fath., 

 soft clay bottom ; 1 c?, 1 Ç. 



Differs from the type species, L. sexpes Alcock (Jour. Asiat. Soc. Bengal, LXIX, 

 p. 330, 1900) in its narrower carapace, and the different shape of the maxillipeds, 

 abdomen and sternal trench. 



This species has a suspicious resemblance to Hexapns sexpes de Man (Arch, 

 f. Naturg., LIII, 1, p. 322, pi. XIII, fig. 3, 1887), but the author does not mention a 

 sternal trench. I doubt if the species represented b^' him is the same as H. sexpes 

 de Haan or H. sexpes A. Milne Edwards which appear also to be distinct from each 

 other. The type of Cancer sexpes Fabricius (Entomol. Syst., Suppl. p. 344, 1798) is 

 not extant, so that the specific name can perhaps not well be retained for de Haan's 

 species. 



a 



(?)Hexaplax, sp. 



Tung Kaben, 6 fath., sand, mud, phanerogams; 

 II. 22; 1 c?, young and soft shell, about 18 mm. wide. 

 This specimen has the form of carapace and 

 front of H. megalops Doflein', also large reniform 

 black eyes set in orbits similar to those of that Fig. 37. Hexaplax, sp., d, is mm. 

 species. The specimen is devoid of chelipeds and ^^'^e: a, body, showing front 

 , J • • , 11, ,1 1 .11.., flattened out, instead of curving 



legs and is m too bad shape to be described with , j ■ ■. » i ■»■ 



o r downward m its natural position; 



accuracy. fc, ma.xilliped. 



Family Xanthidæ. 



Subfamily Xanthinæ. 

 Cymo melanodactylus de Haan. 



Cijmo melanodactylus Alcock, LXVII, 174, 1898. 



Koh Kahdat, coral and coral blocks, 1 fath.; I— II; 2c?, 1 ?. 



1 Brachyura "Valdivia", p. 122, pi. XXXI. fig. 3— 4, pi. I, fig. 7, 1904. 



D. K. I). VIdensk. Selsk. Skr.. 7. Række, naturvidensk. og mathem. Afd. V. 4. 



45 



