gt 
in the proportion of 22 to 26. In Bate’s Challenger Macrura 
the figure, also from an English specimen, gives the proportion 
of 23 to 33. Bell gives the length of the English species as 
reaching two inches to two inches and a half; while de Haan 
for his species gives “‘ Long. corp. 14 inches.” 
Of the breathing organs Bate says (loc. cit.), ‘“‘ There are 
five pleurobranchiae, which are suspended near the upper 
extremity of the chamber, but no other plume or mastigo- 
branchial plates.’’ Nevertheless he rightly figures an epipod 
(in his terminology, mastigobranchial plate) on the second 
maxilliped. 
Processa canaliculata, Leach. 
1815. Processa canaliculata, Leach, Malac. Podophth. Brit., 
text towel. 
1816. Nika edulis, Risso, Crustacés de Nice, p. 85, Pl. 3, fig. 3. 
1825. Nika canaliculata, Desmarest, Consid. gén. Crust., p. 231, 
Pl. 39, fig. 4, 4a-g. 
1853. Nika edulis, Bell, Brit. Stalk-eyed Crust., p. 275, fig. 
fy text. 
1888. Nika edulis, Bate, Challenger Macrura, Reports, Vol. 
XXIV. ps 527, Pl. .o5 (details): 
1893. Nika edulis, Stebbing, History of Crustacea, p. 229. 
1go1. Processa canaliculata, M. J. Rathbun, Bull. U.S. Fish. 
Comm. for 1890, p. 104. 
1904. Processa canaliculata, M. J. Rathbun, Decap. Crust. 
N.W. Coast N.. Amer, ip? Ene: 
The synonymy might easily be lengthened out. There is 
little doubt that it should include Nika couchit, Bell, and 
Miss Rathbun adds N. bermudensis, Rankin. Bate supple- 
ments the figure of his own N. processa with details from N. 
edulis, and remarks, after mentioning de Haan’s N. japonica, 
Dana’s N. hawaiensis, and Stimpson’s N. macrognatha, that 
‘““the resemblance of the species to each other appears to 
be great; the only appreciable distinction in the several 
descriptions, as given by their authors, exists in the variation 
of length and form of the rostrum.” 
According to Miss Rathbun, American specimens have the 
legs more slender than those of European specimens that had 
come under her observation, thus approaching Bell’s var. 
N. couchii. It may be said of the South African specimens 
that they seem rather more delicate in structure than those 
