THE DECAPOD AND STOMATOPOD CRUSTACEA 1 49 



blunt longitudinal crests, the innermost one being very short. Each 

 finger has a similar crest ; the fingers meet along their prehensile edges. 

 The lower surface of palm and fingers is also granulous. 



The second, third and fourth pairs of feet are granulous, the carpal 

 joints each with a large tubercle on the outer side. 



Dimensions. — Of female with eggs, length and breadth 5.7 mm. ; 

 of immature female (figured), length 4.3, breadth 4.6 mm. 



Localities. — Mamanguape stone reef, one male, soft shell ; one 

 female, type. Cat. No. 23755. Pernjimbuco stone reef at Ilha de 

 Nogueira ; one female, figured. 



Color. — In formalin, a light pink, without spots. 



This species approaches P. sociata Say, but in P. rosea the lat- 

 eral marginal line extends much further back before turning inward ; 

 and the ornamentation of carapace and chelipeds is quite different. 



MINYOCERUS ANGUSTUS (Dana). 



Porcellmia an^iista Dana, Crust. U. S. Expl. Exped., i, 423, 1852 ; pi. xxvi, 



fig. 12, 1855. 

 Minyoccrus angiistus Stimpson, Proc. Acad. Nat. Sci. Phila., x, 229 [67], 



1858. 

 PorcelHiia stellicola Muller, Arch. f. Natur., xxviii, part i, 194, pi. vii, 



1862. 



This species was described by Dana from a specimen from Rio de 

 Janeiro, one half as large as the one in hand. Dana's type is not ex- 

 tant. The individual in Dr. Branner's collection is an egg-bearing 

 female. It does not accord in every respect with Dana's description 

 and figure, but allowance has been made for difference in size and 

 possible mutilation. 



The front between the orbits is two-spined instead of three; of 

 these spines, the one on the left side is much shorter than the one on 

 the right, and apparently was broken previous to the last moult ; it is 

 possible that the median spine was also broken off and not renewed, 

 there being only a very shallow lobe in its place. The outer orbital 

 spines are advanced beyond the frontal sinuses. The eye is inter- 

 mediate in length between its adjacent spines. 



The right cheliped only is present. The merus has an inner distal 

 spine. The carpus has a strong spine on the inner margin just an- 

 terior to the middle, and two smaller spines at the inner distal angle; 

 the distal margin is spinulous. The palm increases gradually in width 

 from the carpus to the fingers, which are less than one-third the length 

 of the palm ; fingers stout and narrowly gaping. 



Proc. Wash. Acad. Sci. August, 1900. 



