CERATOMYSIS SPINOSA. ; 229 
which appear to be of a soft consistency, suggesting a tactile office; no visual 
elements are discernible. The first antennex consist of a short three-jointed 
stalk, which bears two flattened and ciliate flagella, the inner one a little 
longer than the outer; the whole antennule is as long as the carapace. 
The antennal scale is linear, ciliated on both margins; the flagellum sur- 
passes the antennular flagella. The mandibular palpi overreach the an- 
tennular peduncles by the length of their terminal segment, which is long, 
oval, and somewhat expanded; the margins of the segments of the mandib- 
ular palpi are prettily fringed with delicate setz. The second, third, and 
fourth pairs of legs are very slender, the hinder three pairs being more 
robust and very long; the antepenultimate pair are the longest of all, 
reaching forward nearly to the end of the antennal scale; the dactyli of 
the last three pairs are long and rather straight. 
The marsupial pouch of the female is composed of seven pairs of lamelle. 
The abdominal limbs (in the female) are simple, except the left one of 
the fifth pair, which bears a slender lateral branch; the first pair is the 
smallest; the fourth and fifth pair are considerably elongated, the fifth to 
the greatest degree, reaching backward beyond the distal end of the basal 
segment of the uropods. The two branches of the uropods are linear, of 
nearly the same length, shorter than the telson; the outer branch is not 
divided by a transverse joint; it is ciliate on both sides, the outer margin 
being furnished, besides, with a few stouter sete. 
Length, 36 mm.; carapace, 9 mm. 
Color in life, milk-white. 
Of this curious Schizopod a single specimen, a female, was taken at 
Station 3357 in 782 fathoms; bottom, green sand; temperature, 38° F. 
