PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 55 
and arrangement of the branchie, as indicated in the following formula, 
is the same as in Munida: 
Somite— 
° VARIES >| VLE IX. Be xi, 2G 054) .000& | XIV. | Total. 
EOS ele ony» sions 1 0 1 0 0 0 0 0 (2) 
Podobranchiw............. 0 0 0 0 0 0 0 0 0 
Arthrobranchix .........-. 0 0 2 2 2 2 2 0 10 
Pleurobranchiw# ........... 0 0 0 0 al 1 1 1 4 
14+(2) 
*There is a perplexing disagreement in Milne-Edwards’s characterization of his 
species between the descriptions of the proportions of the carapax and the accom- 
panying measurements. £. brevimanus and abdominalis are each said to have the cara- 
pax narrower (‘plus étroite”) than EH. longimanus, though the measurements given 
show LZ. brevimanus to be very much, and £, abdominalis slightly, broader than EL. 
longimanus. 
NEw HAVEN, Conn., December 28, 1882. 
