346 



Records of the Indian Mnseuin. 



[Vol. XVI, 



The fingers are longer than the upper border of the palm and 

 meet only at the apices where they are provided with corneous 

 tips and some setae. The dactylus is strongly curved ; it bears 

 a large tooth close to the base and another, not quite so large, 

 near the apex; between the two there are some smaller teeth. 

 The dentition of the fixed finger is similar, the teeth being in 

 advance of those on the dactylus ; the proximal tooth is very 

 large and conical. In the ovigerous female the chelipeds are as 

 shown in Miss Rathbun's figure; the carpus, however, bears a 

 small acute tooth on its inner side. 



The meral segments of the walking legs bear thickly setose 

 patches, resembling tubercles, as described by Miss Rathbun. In 

 addition, the upper surfaces of the meri, carpi and propodi are 

 rather closely covered with brownish hair in males, while in the 

 same sex on the underside of each merus there is a thickly felted 

 patch. 



In the abdomen of the male (text-fig. 19) the suture between 

 the third and fourth segments is exceedingly fine and inconspicu- 

 ous, suggesting that the segments 

 are not separabl}^ movable. The 

 first and second segments are very 

 short, and, though broad, do not 

 nearly fill all the space between 

 the last two pairs of legs. The 

 second and third segments taken 

 together are a little longer than 

 broad with gently curved sides that 

 converge strongly anteriorly. The 

 fifth segment is about as long as its 

 distal breadth, much narrower than 

 the base of the third, and is very 

 inconspicuously contracted at its 

 proximal end. The sixth is broad- 

 er than long and the seventh about 

 as long as broad, with a broadly 

 rounded apex. 

 In the larger of the two males the greatest breadth of the 

 carapace is 5-4 mm., its anterior breadth 4-8 mm. and its length 

 about 40 mm. In the ovigerous female the greatest breadth is 5-2 

 mm. 



T. lingulatus appears to find its nearest allies in T. orientalis 

 (de Man) and T. gangeticus, sp. no v., agreeing with these species 

 in the possession of a strong tooth at the inner angle of the 

 wrist. 



Text-fig. 10. — Tympanomerus 



lingulatus (Rathbun). 



Abdomen of male. 



Trotter 1., Mergui Archipclaoo. 



Jack and Una Is., Mergui Archipclaoo. 



' Investigator." Two males. 

 One female. 



The specimens were found in November 19 13 on a shore 

 composed of mud and sand with larger boulders. That described 



