292 ME. E, I. POCOCK ON THE AEACHNIDA AND MTEIOPODA 



On the Araclinida and Myriopoda obtained by Dr. Anderson's 

 collector during Mr. T. Bent's Expedition to the Hadra- 

 maut, South Arabia ; with a Supplement upon the Scorpions 

 obtained by Dr. Anderson in Egypt and the Eastern Soudan. 

 By E. I. PococK, of the British Museum (Natural History). 

 (Communicated by "W. Peect Sladeh, Sec. Linn. Soc.) 



[Read 7th March, 1895.] 



(Plate IX.) 



AEACHNIDA. 



SCOEPIONES. 



Peionuetts ceassicatjda, Oliv. 



Log. Hadramaut Valley. Three specimens. 



Specimens agreeing with the typical form, but certainly paler 

 in colour, the trunk approaching ferruginous, and contrasting 

 rather strongly with the pale yellow of the legs and chelae. 

 Specimens sent by Dr. Jayakar from Muscat are much darker 

 brown, the same tint prevailing upon the legs and chelge {cf. infra., 

 p. 307). 



Btjthus quinqtjesteiatus, Hempr. Sf Ehrenh. 

 Log. Hadramaut. Collected by the way. 



BuTHTJS ACTJTE-CAEiisrATUs, Simon. 



Buthus acute-carinatus, Simon, Ann. Mus. Geneva, xviii. p. 245, pi. viii. 

 fig. 18 (1883). 



Log. Hadramaut Yalley. One young specimen. 



Recorded originally from Tes (Taez) in Arabia. The British 

 Museum has recently received a large number of examples from 

 Aden, a few from Perim Island, and a few more from Zaila in 

 Somali-land near the Eed Sea coast. The largest examples mea- 

 sure about 45 mm. in length. It appears to be a well-marked 

 little species, as Simon's figure and description abundantly 

 prove ; yet Prof. Kraepehn regarded it as synonymous with 

 £. dimidiatMS. But this opinion is absolutely untenable, seeing 

 that the two forms exist side by side in the same place without 

 in any sense blending. In addition to the distinctive characters 

 touching granulation, development of keels, proximity of eyes, 

 colour, &c., which M. Simon pointed out, it may be added that 

 in B. acute-Garinatus there are only twelve rows of teeth along 

 the movable digit of the chelsp, and that the isolated teeth of the 



