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U.S. NATIONAL MUSEUM BULLETIN 292 



interna), suhcylindrical, and armed distally with crown of moderately 

 long spines. A medium-sized species, maximum postorbital carapace 

 length about 15 mm. 



Color in life. — Body greenish but translucent with internal 

 organs visible (not shown in fig. 17), subtriangular brown stomach 

 most conspicuous, massive hep atop ancreas also dark brown with 

 narrow cream area on dorsal side of each lobe; intestine brown with 

 pair of longitudinal light cream stripes on each side of dorsomedian 

 line; pigmented portion of eyes matching coloration of hepatopancreas. 



Figure 17. — Xiphocaris elongata, male (carapace length 9.6 mm) from Dominica station 48. 



Carapace wdth short brown or purple stripe just posterior to orbit, 

 and promment irregular spot just poster© ventral to stripe; another 

 stripe of same color, although more diffuse and becoming reddish, 

 extending from antennal spine posteriorly almost to posterior margin 

 of carapace, posteriorly Ihie continuous with broad transverse band 

 of red chromatophores extending across carapace to line on opposite 

 side. Postero ventral portion of branchial region with narrow white 

 stripe extending from level of coxa of second pereiopod to level of 

 that of fifth, subtended below by bluish-purple one; ventral margin 

 of carapace with bluish-purple stripe extending from level of base of 

 third maxillipeds to level of coxa of thu'd pereiopod. Rostrum distal 

 to posterior series of dorsal spines orange with lower margin studded 

 with brown corneous spines. Tergum of first abdominal somite with 

 narrow anterior and posterior transverse bands of purplish red, 

 bands extending ventrally to base of pleuron; tergum of second and 



