554 CRUSTACEA. 



Length, 8-9 lines. Basal spine of inner antennae a little longer 

 than first joint, and extending about as far forward as apex of spine 

 of outer antennse, and half way to apex of basal scale of outer pair. 

 The beak is about two-thirds as long as first joint of inner antennae. 

 The outer maxilliped has the last joint short pubescent with short hairs 

 at apex. The smaller hand is oblong, nearly linear. The fingers of 

 larger hand are out of plane of hand. The hand of the second pair 

 is as long as the third, fourth, and fifth joints of the carpus. Fifth 

 joint of third or fourth pair quite long, more than twice as long as 

 fourth joint, seven or eight sets of spinules below ; third joint some- 

 what pubescent. 



IE. KOSTRUM INTER OCULORUM BASES ORTUM, SULCO PROFUNDO IN CARAPACE 



UTRINQUE EXCAVATO. 



a. Orbitse margo inermis. 



Alpheus PUGNAX. 



Rostrum acutum, anguste triangulatum, planum, inter oculorum bases 

 ortum. Spina antennarum externarum basdlis parva; squama basi 

 paulo longior. Spina antennarum internarum basalis articulo \mo 

 non brevior, articulus 2dus brevis, Stius squamam externarum turn 

 superans. Pedes antici inosqui; manu majore elongatd, Icevi, margi- 

 nibus rotundatd, supra angustd emarginatd, digitis brevibus (manu 

 triplo brevioribus) , brachio apicibus instar spinas acuto. Pedes 2di 

 longi, articulo carpi Imo dimidio breviore quam 2dus. Psdes 3tii 

 itique graciles, articulo 3tio apicem inferior em unidentato. 



Beak acute, narrow triangular, flat above, arising from between the 

 bases of the eyes. Basal spine of outer antenna3 small, basal scale 

 longer than base. Base of inner antennae shorter than scale of 

 outer ; basal spine of inner antennae not shorter than the first joint, 

 second joint short. Anterior feet unequal; larger hand long, 

 smooth with rounded margins, narrow emarginate above near arti- 

 culation, fingers short (about one- third the length of hand), arm 

 having a spine at both outer and inner apex. Feet of second pair 

 long, first joint short, hardly half the second in length. Third and 

 fourth pairs slender, third joint with an acute tooth at lower apex. 



