NO. 1059. AMERICAN ISl'LJVIEi:^ OF HYNALPHEUH—VOVTIEHM. 



63 



The seo^ments of the antennule are to one another as 2.15, 1.3, 1 ; 

 the stylocerite is a little shorter than the basal article; the basicerite 

 has its upper ani»;le a right angle, and its lateral spine very strong, 

 reaching the last third of the distal segment of the antennule; it has 

 the same width and length as that of the scaphocerite, Avhich bears 

 no trace of a scale in either sex; the carpocerite exceeds the antennule 

 by the length of the distal article, and is 5.5 times longer than wide, 

 a little concave exteriorly. 



The proportions of the large chela are: Fingers 1 ; total length 3.3; 

 height 1.3; it is consequently much like that of S. goodei^ and like- 

 wise possesses a strong tubercle on the anterior margin of the palm, 

 with a short spine directed toward the base; the meropodite has a 

 straight, not spinous, upper margin. 



Fig. 36. — Synalpheus gkampusi. a, frontal and antennal region, male; a<S, anoma- 

 lous specimen; K, large cheliped; k', small cheliped of first pair; I, foot 

 OF second pair ; in, foot of third pair, male and female ; t, telson ; u, uropod. 



The small chela is to the large as 1 to 2.9. Its relative dimensions 

 are : Fingers 1 ; total length 2.68 ; height 0.85 to 0.9 ; both fingers end 

 in a sharp point ; the carpus is 0.52 of the entire cheliped ; the mero- 

 podite is 3.9 times longer than wide. 



In the female these proportions become, for the large chela : Fingers 

 1; total length 3.3; height 1.37; and for the small chela, respectively, 

 1 ; 2.78 ; 0.9 ; the large chela is therefore a little more thick-set in the 

 female, and the fingers of the small claw are slightly shorter. 



Tn the second pair the first segment of the carpus equals the termi- 

 nal chela, the sum of the other 4 segments being greater; the carpus 

 is about 9 times as lonir as wide. 



