Decapod Crustacea of Hcnnnda, Part II. 31 



Measurements of a Hcninnlti specimen. 



No. <S 1 4 



Total length, from base of antonnules 



Length of carapace 45 



Breadth of carapace, anteriorly 44 



Breadth of carapace, in middle 40 



Breadth of carapace, between orbits 30 



Diameter of orbits 5 



Length of anti-penultimate antennal segment 18 



Breadth of anti-penultimate antennal segment 17 



Length of distal segment (part exposed) 7 



Breadtli of distal segment 24 



Sex male 



I have had an opportunity to study a living specimen in the 

 aquarium at Agars Island, Bermuda. Miss Rathbun states (in a 

 letter) that there is a Bermuda specimen in the U. S. Nat. Mus. 

 collected In 1 )r. T. H. Bean. I am much indehteded to her fur the 

 photograph of Dr. Bean's specimen, which I have reproduced. 



Tribe ASTACIDEA Dana (emend.). Lobsters; Craw-fishes. 

 Astacidea (pars) De Haan, 1850. 

 Astacidca (pars) Dana, 1852. Heller, 1863. 

 Homaridca Ortmann, 1891. Rathbun, op. cit, 1901, p. 98. 

 Nephropsidca Ortmann, Syst. Crust., p. 429, 1896. 



Three pairs of legs are chelate ; the first pair largest. Anten- 

 nules have two long, slender, multiarticulate, not spinose, flagella. 

 Antenna; have a large scale and a very long flexible flagellum. 

 Telson is large and strong, usually with terminal spines. Uropods 

 are large ; the outer branch usually has a distal articulation ; margin 

 rather stiff. Legs have seven functional segments. First segment 

 of the abdomen (pleon) bears a pair of appendages in both sexes, 

 with few exceptions. The last thoracic segment is consolidated 

 with the preceding one. The female commonly has an external 

 spermatheca. 



Family HOMARID^ Huxley, 1883, Lobsters. 

 Astacida (pars) Dana, 1852. Heller, 1863. 



Homaridcc Bate, Voy. Chall. vol. xxiv, Macrura, pp. 56, 170, 1888. M. J. 



Rathbun, op. cit., 1901, p. 98. 

 Xcphropsidcc Stebbing, Hist. Crust., p. 201, 1893. Ortmann, Syst Decap. 



Crust., 1896. Stebbing, Crust. S. Africa, part I, p. 33, 1900. 



