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sexual openings debouch in a projecting papilla between the 
bases of the first ambulatory legs.’ Henderson makes no 
remark upon this statement, which would give the species so 
exceptional a position. In the female specimen here under 
consideration the genital openings are placed according to rule 
in the basal joint of the third legs, the second ambulatory pair. 
It must be taken for granted that Studer was misled by the 
appearance of the sternum, and therefore did not look for the 
true genital openings. In the present specimen there is no 
papilla on the sternum, and what appear delusively as genital 
openings are widely separated. But these differences from 
Studer’s description may be due to immaturity. The very 
small first pleopods and the much larger four following pairs 
do not seem to have attained their full development. The 
rudimentary plates of the sixth pleon segment are exceedingly 
small, not, visible dorsally. The telson is apically acute. 
The carapace is 6 mm. long in the median line, and may be 
taken to be at least of equal breadth. Studer gives the length 
as 16mm. and the breadth as 15 mm., without saying whether 
the measurements apply to both sexes alike or only to one of 
them. 
Locality —Vasco de Gama Point, S.75 E., 134 miles; depth, 
166 fathoms. 
Gen. Exodromidia, n. 
Carapace with large tubercles, not narrow. Sternal sulci of 
female strongly convergent, narrowly separated at the apices 
just behind the chelipeds. Chelipeds without epipod, much 
larger in male than in female. Fourth and fifth legs very 
small, the finger opposed to a spine projecting from the pre- 
ceding joint. Sixth pleon segment with vestigial appendages 
concealed, the third, fourth and fifth segments in the male 
being similarly furnished. 
The genus is founded for a species removed from Dromidia, 
and to this circumstance its name refers. 
In Stimpson’s definition of Dromidia, the sternal sulci of the 
female are produced to the segment of the chelipeds; the 
sixth pleon segment has appendages, though they are said to 
be minute, concealed; the legs are like those of Dromua. 
Dromia hirsutissima, Lamarck, is given as the type. But of 
this, unfortunately, so little is known that Mr. Borradaile in 
his revision of the family, cannot decide whether it should be 
retained in Stimpson’s genus or not. He suggests the union 
of Stimpson’s Pseudodromia with Dromidia, and gives a modi- 
tied definition, according to which the fifth leg is ‘‘ longer than 
