19U0.J FROM THE FALKLAND ISLANDS. 567 



EXPLANATION OF THE PLATES. 



Platf, XXXVI. 



A. Halicarci/ius ovatus, p. 523. 



n.s. Natural size of carapace, breadth measured at widest part of rim, length 



from middle rostral tooth to posterior margin. 

 E. Rostral teeth. 

 PI. Pleoii (if male. 

 m., m. Mandibles, outer surface. 



mx. 1. First maxilla, with spiue-iiiargins more highly magnified. 

 mxp. 3. Third or external maxilliped, iimer surface. 



prp. Terminal joint of a tiunk-leg or peraeopod, with apical part more highly- 

 magnified. 

 pip. S • Pleopod of male. 



B. Ha/lrarcinus planatus, p. 524. 



n.s. Natural size of carapace, measured as iu preceding species. 

 B. Rostral teeth. 

 m. Mandible, inner surface. 

 mx. 2. Second maxilla. 



m.vp. 1. First maxilliped, with apex of cndopod more highly magnified. 

 mxp. 2. Second maxilliped. 



mxp. 3. Third or external maxilliped, inner surface. 



prp. Terminal joint of a trunk-leg or peraeopod, with apical part more highly 

 magnified. 



Plate XXXVII. 



Evphausia vallentini, p. 545. 



Cp. Lateral and hind margins of carapace. 



PLs.3. Posterodorsal tooth of third pleon-segment. 



p.s. Preanal spine. ;o..s.* The same, from another specimen. 



as.,a.i. Eye, together with first antenna, second antenna, and rostral point. 



rn.., m. Mandibles. 



l.i. Lower lip. 



mx. 1, mx. 2. First and seconil maxilhe. 



mxp.1,2,3. First, second, and third maxillipeds. without branchial append- 

 ages, the third also without exopod. Apex of second maxilliped more 

 highly magnified. 



2>rp. 1, 2, 3. First, second, and third perteopods, without exopods or branchiK. 



exop. A detached exopod. 



urp. Uropod. 



T. Telson. Apical portion and one subapical process more highly magnified. 

 The mandibles, lower lip, first and second maxilla?, preanal spines, apex of 



second maxilliped, and apex of telson are more highly magnified than the 



other figures, but the figures in each group are all to tlie same scale. 



Pl.ATK XXXVIII. 



IiiJ.f j>uhei<cen!>, p. 549. 

 K..S. Line showing length of specimen figured. 

 a.s., a.i. First and second antennae. 

 l.s. Upper lip. 

 m.,m. Mandibles. 

 Li. Lower lip. 



mx. \,mx. 2. First and second maxillse. 

 m.rp. Maxillipeds. 



gn. l.prp. r>: First gnathopod and fifth pera'opod ( firsf and seventh trunk-legs). 

 PL The seraipclhicid pleon, 

 urp. Uropod. 



The mouth-parts, fingers of trunk-legs, and one uropod are magnified to the 

 same scale, except the apices of wx. 1 ; tlie other d(>lails are less enlarged 



[ol] 



