MUSEUM OF COMPARATIVE ZOOLOGY. 181 
typical form. This variety may be called Galacantha diomedee parvispina. At 
one station (3429) both forms were obtained at the same haul. 
This species differs from G. rostrata, arcolata, spinosa, and talismanii in the 
rugose nature of the sculpture of the hinder half of the carapace. In the 
~ relative proportion of the anterior and posterior lateral spines it agrees with 
G. spinosa. 
Station 3357. 782 fathoms. 1 female juv. 
se) ‘oBOa. Seon eo 3 males, 3 females ovig. 
“ . 3064, 90202. 1 female. 
© pobG., tO6i 5 ss 3 males, 1 female ovig. 
Bef le veO 5 males, 2 females (1 ovig.). 
<0 OO orga g is er 1 male. 
© . da95. 1020; .* 3 males. 
« ~= 38407. 88 * 2 males, 1 female, 
ee 8429. ,- 919) 1 male. 
Var. parvispina. 
Station 3418. 660 fathoms. 1 male. 
OF, Ala de eee 1 female ovig. 
3494, 1676) Imale, 
Sf O ga2Or OL = 1 male. 
-3435,,. 859 18 males, 17 females (6 ovig.). 
« ~3436,. 905 — © 6 males, 4 females (3 ovig.). 
In both G. rostrata and G. diomedee there is a curious sexual difference. In 
the male the proximal half of the telson is furnished on each side with long 
amber-colored sete, which are entirely wanting in the female. The same 
difference between the sexes is found in some species of Munidopsis. 
G. diomedee is often infested with parasites. One of the males from Station 
3371 bears a Peltogaster, while seven specimens (5 males, 2 females) of var. 
parvispina house a Bopyrus in the left branchial chamber. 
The eggs of this species measure 3 X 2.5 mm. 
Munidopsis! vicina, sp. nov. 
Near M. ciliata Wood-Mason, from which it differs as follows. It is a very 
much smaller species, the adult ovigerous female being only twenty-nine milli- 
meters long; the anterior margin of the propodus of the ambulatory appen- 
dages bears two very prominent spines. The telson lacks the pair of long and 
narrow plates which lie on each side of the small central plate in M. ciiiata. 
As in M. ciliata, the carapace is covered with squamous tubercles, the rostrum 
is curved slightly upward, and the chela is short. 
Length, 29 mm. ; breadth, 9.5 mm. 
Station 3360. 1672 fathoms. 1 female. 
«3382. 1798 “ °* 1 female ovig. 
1 The genus Munidopsis, as here understood, includes Galatodes, Orophorrhynchus, 
and Elasmonotus of A. Milne Edwards, and Anop/onotus of Smith. 
