CRUSTACEA. 

 114 



Genus PEKINEA {Dana). 



PericOTofti*. Orbita antic, pernio aperta coqite wn hem feftufata, 

 margins superiore non unifisso. Artienlus antenmmnn esternamm 

 lmus obhngus, antwe non latior, apice externa ptuh prubctat. 

 Rostrum brevinscidum, cornubus dkaricahs. < 'arapu famulus, pau, 



cis tuberculis tumidis ornatus. 



Near Pericera. Orbit, anteriorly somewhat open and not shut in as 

 in Pericera; superior margin without a fissure. First joint of outer 

 antennas oblong, not broader at apex. Beak rather short, furcate, 

 horns separated. Carapax tumid, having a few tumid tubercles. 



The orbit in this genus is not so completely tubular as in Pericera, 

 the anterior side being more open, so that the eye has some forward 

 motion. The posterior side only projecting, there is some resem- 

 blance to the orbit in Leucippa. Moreover, the first basal joint of the 

 exterior antennas is oblong, not broad at apex. The body of the 

 species seen is very tumid, and the tubercles are prominent on the 

 posterior half, though not acute. 



Perinea tumida. 



Carapax valde tumulus, brevis (Int. maximd long, poet-rostralem 

 wqwmte) , laieribus rotundat'is, regione mediand ronvcrd minutd hi- 

 tuberculatd, regione cardiaed large tidtereuliformi, tot, mil tumid! 

 tri-tubercidatd. Rostrum breve, tatitudim transorbital i fere duple 



brevius. Spina pree-orbitaUs brevis, sul><t<-ufo. P,,l<s brvre*, articulis 

 3tio Atoque spinose tube re id 'at is, monu crassd, digit is laliesimi liiauti- 

 bus, digito mobili prope basin unidentato. 



Very tumid, short (post-rostral length about equal to greatest breadth), 

 sides rounded and thick, medial region eon vex, with two minute 

 tubercles, cardiac region with a large prominent tubercle, and the 

 lateral with three prominent tubercles either side. Beak sh. 'li- 

 nearly twice shorter than the trans-orbital breadth. Pneorbital 

 spine short, subacute. Feet short, third and fourth joints spin.— 



