346 



REPORT OF COMMISSIONER OF FISII AND FISHERIES. 



[2] 



tbe record of speciiiieiis examiued is not given in tabular form these 

 catalogue numbers simply follow in parenthesis the mention of the 

 specimens. In a few cases I have added to the list of specimens taken 

 by the Albatross (Stations 2001 to 2116) those taken off Martha's Vine- 

 yard in 1883 by the Fish Hawk (Stations 1156 to 1176). 



BRACHYURA. 

 MAIOIDEA. 



Amathia Agassizii Smith. 



Bull. MuB. Comp. Zool., x, p. 1, pi. 2, figs. 2, 3, 1882 ; Proc. National Mu- 

 seum, vi, I). 3, 1883. 



Specimens examined. 



The two specimens from Station 2109 are much larger than any pre- 

 viously obtained, and are fully adult. These specimens differ from the 

 smaller ones described and figured, principally in having proportionally 

 much shorter rostral horns, shorter spines upon the carapax, and longer 

 peraeopods. The female, as usual, has much shorter chelipeds and a 

 broader and more swollen carapax than the males. These differences 

 are all well shown by comparing the accompanying measurements with 

 those previously given. 



Measurements in millimeters. 



Catalogue number. 

 Station 



5693 

 2109 



5693 



2169 



Sex 



Length of carapax, including rostral and posterior spines 



Length of carapax from ba.'^o of rostral to tip of posterior spines 



Length of carajjax, exchidinf^ rostral and posterior spines 



Lengtli of rostral horns or spines 



Brcaflth of carapax, includiug lateral spines 



l?ieadth of carapax, excluding lateral spines 



Length of branchial spines 



I.engtli of tholipod 



Length of eliela 



]5readth of chela 



Length of dactylua 



Length of first ambulatory peraeopod 



Length of dactylus 



Length of second ambulatory perajopod 



Length of dactylus 



58.0 

 51.5 

 51.0 



7.5 

 44.3 

 41.3 



3.5 

 95.0 

 44.0 



6.0 

 14.5 

 146.0 

 25.0 

 122. 

 21.6 



9 



71.3 

 62.2 

 62.2 

 10.0 

 54.0 

 51.0 

 4.0 

 94.0 

 44.0 

 6.2 

 17.0 



183.0 

 28.5 



146.0 

 25.0 



In the two large specimens (5693), after preservation in alcohol for 

 several weeks, the distal parts of the meri and i^ortious of the carpi of all 



