1900.] FROM SINGAPORE AND MALACCA. 759 



eminences between the bases of the eyestalks, and extending along 

 the latter as far as the cornese ; but the degree of this mottling 

 varies, and is less conspicuous in some individuals. Hands and 

 fingers bright yellow. 



Dim. 6 8-75x8. $9-5x8-5. $9-25x8-25. $8-75x7-5. 



LI. Genus Macbophth a lmus Latr. 



88, Macrophthalmus dilatatus carens, var. nov. (Plate 

 XL VII. fig. 11.) 



Cf. Ocypode (MacropTiihalmus) dilatata, de Haan, Crust. Japon. 

 p. 55, pi. xv. f. 3 (1839). 



Macrophthalmus dilatatus, M.-Edw. Ann. Sci. Nat. ser. 3, Zool. 

 t. xviii. p. 157 (1852); de Man, Notes Leyd. Mus. vol. xii. pi. iv. 

 f. 9 (1890); Ortmann, Carcinol. Stud., Zool. Jahrb. Bd. x. p. 345 

 (1898). 



Hah. Singapore and Malacca ; littoral. Five males and six 

 females, four of the latter carrying ova. 



There is a specimen in the Museum from Singapore, from the 

 'Alert' collection, referred to " M. dilatatus, young?," presumably 

 by Mr. Miers ; of which, however, I can find no mention in the 

 descriptive account of the ' Alert ' Crustacea. It is identical with 

 the present specimens ; and on an examination of these, I find 

 them sufficiently distinct from the type to be considered as a well- 

 marked variety. 



The average size of these specimens is 15 mm. breadth to 7'5 mm. 

 length : two of the females with ova are considerably larger, but 

 the other three (two having ova) are of these dimensions, so that 

 they may all be regarded as adult. I find the following departures 

 from the type : — 



a. The chelipedes are shorter, being only just longer than 

 the breadth of the carapace, whereas in de Haan's species they are 

 not quite half as long again. 



b. The spinules on the upper margin of the hand are wanting, 

 and the granules on the outer surface very small, though numerous. 



c. A well-marked dentated tubercle exists at the base of the 

 dactyl ; and there is a flattened dentated prominence extending 

 from the base to the middle of the thumb, which is less evident in 

 3£. dilatatus. The thumb is only slightly deflexed, and the carina 

 near the lower margin is rather strong and obscurely grauulous. 



Dim. c? 15x8. 6 15 5x8-25. tf 13-75 x 7-5." 6 12x6-5. 

 c? 11-5x6-5. $19-25x10. $18x9-5. $13-5x7-5. $13x7. 

 $ 12-5x7. $ 11-5x6-5. 



89. Macrophthalmus crassipes M.-Edw. 



Macrophihcdmus crassipes, M.-Edw. Ann. Sci. Nat. ser. 3, Zool. 

 t. xviii. p. 157 (1852) ; de Man, Notes Leyd. Mus. vol. xii. p. 76, 

 pi. iv. f. 7 (1890) ; Ortmann, Carcinol. Stud., Zool. Jahrb. Bd. x. 

 p. 345 (1898). 



Hab. Singapore ; littoral. Four males and three females, one of 



