210 SPOLIA ZEYLANICA. 



AcKOCALANUS MONACHus, Gicsbrecht. 



Acrocalanus monachus, Thompson & Scott, 1903, p. 243. 



Cleve, 1903, p. 35(1 



Wolfenden, 1905, p. 1002. 



A. Scott, 1909, p. 30. 



ScM^ell, 1912, p. 359. 



A few specimens were obtained. 



Acrocalanus gibber, Giesbrecht. 



Acrocalanus gibber, Giesbrecht, 1888, p. 332. 



Giesbrecht, 1891, p. 282. 



Giesbrecht, 1896, p. 318. 



Thompson, 1899, p. 276. 



Cleve, 1901, pp. 4 and 36. PI. II., 



figs. 1-16. 

 Acrocalanus pediger (? part), Cleve, 1901, pp. 5 and 33. 



PI. I., figs. 1-14. 

 Acrocalanus gibber, A. Scott, 1902, pp. 402 and 423. 

 Acrocalanus gibber, Thompson & Scott, 1903, p. 243. 

 Acrocalanus pediger, Cleve, 1903, p. 356. 

 Acrocalanus gibber, Cleve, 1904, p. 184. 



Wolfenden, 1905, p. 1003. 



A. Scott, 1909, p. 29. 



Sewell, 1912, i^p. 315 and 359. 



Considerable confusion appears to have arisen with regard 

 to this species. The original description was based on female 

 examples only, and this form is easily recognized by the shape 

 of the body and the partial separation of the first thoracic 

 segment from the head region. Cleve {loc. cit., 1901) described 

 a form from the Malay Archipelago which he considered to be 

 the adult male ; these examples, though closely resembling 

 the female as regards the armature of the swimming legs, yet 

 differ considerably in the shape and structure of the cephalo- 

 thorax. In the same paper he described a form which he 

 named A. pediger, but as I. have already pointed out {vide 



