ii4 Addison E. Verrill, 



Synalpheus longicarpus Coutiere, op. cit., 1900, p. 53, fig. 31. Hay and 

 Shore, op. cit, p. 383, pi. 26, fig. 2; text-cut 6 (after Coutiere) , 1918. 



PLATE XXV, FIGURES la ih (after Coutiere). PLATE XXXIV, FIGURES 

 3, 3c (? Variety). PLATE XXXVI, FIGURES 5, $a. 



Rostrum narrower and a little longer than the triangular, obtuse, 

 orbital spines ; space between the latter and the rostrum V-shaped, 

 but not acute distally, broadest in female ; rostrum scarcely reaches 

 middle of first article of antennular peduncle. Articles of anten- 

 nular peduncle have ratios of 2 : 1.5 : I ; its entire length to breadth 

 is 5:1; anterior margin of basal article is less emarginate than 

 usual; its short stylocerite reaches the distal third of the basal 

 article. The carpocerite is slender and cylindrical, a little 

 excurved ; it exceeds the antennular peduncle by the length of the 

 third article of the latter, and is five or five and one-half times as 

 long as thick. Its scaphocerite in the male has only a rudimentary 

 scale, sometimes none ; in the female the scale is small and variable, 

 rarely longer than the basal article of antennule, and never more 

 than half as wide as the lateral spine, which is strong and acute; 

 it exceeds the antennular peduncle by half the distal article. 



The large chela is elongated, somewhat ovate, the margins some- 

 what convex ; the posterior end is swelled and prolonged backward 

 beyond the articulation, the very small and short carpus being 

 inserted below the central axis of the palm. The anterior dorsal 

 margin of the palm has a small acute spine ; total length to height 

 of chela about as 2.73 : i ; dactyls about one-fourth to one-fifth the 

 total length ; dactyl a little oblique at end. 



The larger chela is from two and one-half to three times the 

 length of the smaller one, which is elongated, its height to length 

 being about as i : 3.75. The dactyl has two apical teeth, the lower 

 stronger. The fixed finger has three teeth, the apical one longer. 

 The dactyl is elongated, nearly straight on the edge, gently arched 

 dorsally. It bears on its dorsal surface a dense tuft of erect hairs, 

 covering most of its length; the fixed finger has hairs along the 

 inner edge and two small apical tufts. 



The legs of the second pair are slender ; the chelae are elongated 

 and little swollen and have several tufts of hairs on both fingers, 

 about ten in all. They are stronger in the male. The first article 

 of the carpus is shorter than the sum of the other four. The chela 

 in the male is longer than the four distal articles, but shorter in 

 the female. The third legs are also stronger in the male; the 



