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32 



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SCOKPIONES. 





f: 



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Brazil ; and, lastly, the species has been met with in West Aft 



in 



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type of C. gambiens 



and Sierra Leone {Surg.-Maj 



in 





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doubt, however, its presence in Africa is attributable to artificial introd 



m « J- 



human agency in connection, perhaps, with 







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No 



through 



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the 



lave-trade— a suppositio 

 Costa Kica, is common 



in 

















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by the circumstance that the species in San Jose, 

 of old houses, according to Tristan. 



Centrums granosus, Thorell 18 , based upon a specimen from the island of San Jose, 

 the Gulf of Panama, is, I suspect, to be referred to the young of this species. There 



t ' " Mm.. * 



appears to be nothing in the description to discountenance this belief, and much to be 



in 



found in its favour 



The coarsely and serially granular carapace, the strong and smooth 



superior keels on the hand, the eight rows of teeth 



movable finger, the number 



of pectinal teeth (26-27), the presence of a moderately strong, conical, subaculear tooth 

 the flatness of the upperside of the fifth caudal segment and its squared lateral angles 





the paler colour of the last abdominal somite, the darker tint of the underside of the 



caudal segment, the blackish keels, the hands rather more deeply tinted (paullo 



fifth cat 



satnratius coloratis) than th 



of the chelae and the legs, with the fing 



not 



■ 



infuscate — all these characters agree with those of C. margaritatus ; whereas the smaller 

 size (54 mm. in total length, with the carapace 6 and the tail 32*5), the narrow hand, 

 which is scarcely wider than the brachium (2 J mm.: 2J mm.), and the lightly lobate 



- 

 > 



movable finger attest 



the immaturity of the type specim 



Thorell himself. 



gb 



g 



Lastly, it is significant 

 dze that G. margaritatus, 

 he identified as C. de geeri, compares 

 C. granosus with C. margaritatus in the following words : — " Haec species [C. granosus'] 

 tScorp. margaritato, Gerv., certe valde affinis est, sed verisimiliter diversa : in C. mar- 



G 



the same species as the one 



garitato, secundum figuram a Cel. Gervais datam 



manuum 



fortiter granulosa 



■ 



sunt, in nostra specie omnino sunt lseves." As a matter of fact, the granulation 



>re 4 pointed out, 



of the keels in this figure is grossly exaggerated 



I have elsewh 



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that the only difference between the two forms mentioned by Thorell falls to the 



ound. 



Prof. Kraepelin appears to me to have fallen into errors in his identification of 



C. granosus 



which careful perusal of Thorell's descriptions would have rendered 



possible. He determines as C. granosus a species from Curacoa and, as he 



o 





from Barbados, which is uniformly coloured throughout, and has no subaculear tooth, 

 quite ignoring Thorell's account of the coloration of the type of C. granosus and his 

 statement as to the presence of a " dens satfortis, conieus" beneath the aculeus. 



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11. Centruroides gracilis. (Tab. VII. fig 



6 



4.4 



Bcopio australis, De Geer, M 



f 



(1778) 



$•) 



[teste Thorell, Atti Soc. Ital. Sci. Nat 



xix. p 



(1877)] (nee Scorpio australis. Linn.) 



Scorpio gracilis, Latreille, Hist. Nat. Gen. Crust, et Ins. vii. p. 127 (1804) 





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