74 



THE VOYAGE OF H.M.S. CHALLENGER. 



Measurements. 



Total length, from tip of rostrum to tip of telson on middle line, 

 Eostrum, ....... 



Carapace, ....... 



Carapace including rostrum, .... 



From posterior edge of carapace to posterior edge of third thoraci 

 somite, ..... 



fourth 



From posterior edge of third to posterior edge of 



somite, ..... 

 From posterior edge of fourth to posterior edge of fifth 



somite, ..... 

 First abdominal somite, 

 Second abdominal somite, . 

 Third abdominal somite, 

 Fourth abdominal somite, . 

 Fifth abdominal somite, 

 Sixth abdominal somite, 

 Telson on middle line. 



Total length of bind body, 



Total length on middle Hne, 



Greatest length of telson, . 

 Width of carapace between antero-lateral angles, 

 Width of carapace (greatest), . 

 Width of third thoracic somite. 

 Width of fourth thoracic somite, 

 Width of fifth thoracic somite. 

 Width of first abdominal somite. 

 Width of second abdominal somite. 

 Width of third abdominal somite. 

 Width of fourth abdominal somite, 

 Width of fifth abdominal somite. 

 Width of sixth abdominal somite. 

 Width of telson between postero-median spines, 

 Width of telson (greatest). 

 Length of paddle of exopodite of sixth abdominal appendage. 

 Length of second joint of exopodite of sixth abdominal appendage. 

 Length of endopodite of exopodite of sixth abdominal appendage, 

 Distance between tips of sixth abdominal appendage, . 

 Length of first antenna, measured from tip of rostrum. 

 Length of flagellum of second antenna. 

 Length of scale of second antenna, 

 Length of eye, ..... 



thoracic 

 thoracic 



In inches and 

 decimals. 



1'27 

 •08 

 •30 



•38 



•0-5 



•06 



•08 

 ■10 

 •09 

 •09 

 •12 

 •13 

 •07 

 •10 



•89 



1^27 



•14 



•IS 

 •23 

 •25 

 •26 

 •24 

 •27 

 •27 

 •27 

 ■27 

 •27 

 •26 

 •08 

 •26 

 ■06 

 •10 

 •10 

 ■57 

 •35 

 •20 

 •13 

 •09 



In thousandths 

 of total length. 



62 

 234 



296 



39 



47 



62 



78 

 70 

 70 

 93 

 101 

 55 

 78 



673 



969 



109 



140 



179 



195 



199 



187 



210 



210 



210 



210 



210 



199 



62 



199 



47 



78 



78 



444 



273 



156 



101 



70 



Colour. — The fifth and sixth abdominal somites and the telson and uropods of the 

 alcoholic specimen are colourless and rough, while the rest of the body is highly polished, 

 and mottled with brown pigment. 



Remarks. — The only species which is at all similar to this is Wood-Mason's Gono- 

 dactylus glyptocercus from the Nicobars, but his description, which is given below, is so 



