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Merus of external maxillipeds not much superior in size to 



ischium, internal half of the former smooth. Fingers of 



chela about 2Y2 — ^3 times as long as palm, the former 



finely serrated at inner margins D. intermedia de Man '). 



10. Mesogastric region of carapace divided into five large tuber- 

 cles and with two narrow, crossing sulci, one transverse, 



the other longitudinal, the latter continued backward on 



to the broad transverse sulcus of the carapace . . . D. blanfordi Alcock ") 

 Mesogastric and cardiac region of carapace not subdivided, 



granulate ; transverse, posterior sulcus interrupted in the 



middle, between the posterior ends of the branchio-cardiac 



grooves. Outer surface of meropodite of cheliped with 



two tympana, the proximal one the larger, near under 



border of arm, the distal one rounded, situated in the 



angle between the carpal and superior border . . . . D. zvichmanni de Man 



I. Dotilla wichmanni de Man. 



1892. Dotilla wichmanni de Man. Weber's Zool. Erg. Reise niederl. Ost-Indien, Bd 2, p. 308, 



pi. 18, f. 8. 

 1895. Dotilla tvichmanni de Man. Zool. Jahrb., Syst., Bd 8, p. 577. 

 1910. Dotilla wichmanni Rathbun. K. Dansk. Vid. Selsk. Skr., 7. Raekke, Afd. 5, n" 4, p. 324. 



Stat. 131. Karakelang, Talaut Islands. Reef, i cf. 



My specimen is distinctly larger than the largest specimen of de Man, as the length of 

 the carapace is 7.75 mm.; nevertheless, it agrees perfectly with de Man's elaborate description. 

 In specimens from Atjeh, described by de Man in 1895, the movable finger of the chela scarcely 

 shows a trace of the longitudinal, granulate ridge in the middle of the cutting margin ; my 

 specimen agrees, however, with de Man's original specimens from Celebes, in which this ridge- 

 like teeth is distinct. Miss Rathbun, who records this species from several locaHties in the Gulf 

 of Siam, adds the following remark (on authority of the collector Dr. Th. Mortensen): "these 

 small crabs make small balls of sand, thrown out from their holes". 



Scopimera de Haan. 

 1833. Scopimera de Haan. Faun. Japon., Crust., p. 24. 



De Man ^) proposes to unite this genus with Dotilla^ and indeed the two genera resemble 

 each other closely in outer appearance, but Alcock has enumerated several characters by which 

 the present genus is distinguished. Besides, in the typical species, the only one I could examine, 

 there is an opening between the bases of the first and second walking legs. 



1) Joiun. Linn. Soc. London, v. 22, 1888, p. 135, pi. 9, f. 4—6. Alcock, 1. c. p. 365. Plentiful on Sullivan Island (Mergui Aichip.). 



2) L. c. p. 366. 111. Zool. "Investigator", Crust, prt. 10, 1902, pi. 63, f. 3. Observed on the coasts of Sind and Baluchistan. 



3) Journ. Linn. Soc. London, v. 22, 1888, p. 129. 



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