70 



PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxvi. 



short, only 4.5 times longer than wide (4,4 in the male, 4.6 in the 

 female). 



The sexes frequently ditfer in the proportionate size of the large 

 chela, but this character is very inconstant. The most massive 

 form, which I have observed in the males, correspond to the follow- 



FiG. 41. — Synalpheus brooksi. a, frontal and antennal region, male and female; 



C, CAKPOCERITE, MALE AND FEMALE ; 6 B, EGG OF NORMAL SIZE ; 6 C, EGG OP ABNORMAL 

 SIZE FROM FEMALE, ALBATROSS STATION NO. 2362 ; 6 D, EGGS OF ABNORMAL SIZE FROM FE- 

 MALE, BLAKE ; K A, LARGE CHELA ; K B, LARGE CHELA, FEMALE, BLAKE ; K C, LARGE 

 CHELA, ANOMALOUS, ALBATROSS STATION NO. 2362 ; K D, LARGE CHELA, ANOMALOUS, FE- 

 MALE, BLAKE; K", CARPUS AND MEROPODITE OF LARGE CHELIPED ; k' , SMALL CHELIPED 

 OF FIRST PAIR, MALE AND FEMALE ; k'", FINGERS OF SMALL CHELIPED OF FIRST PAIR ; 

 I, FOOT OF SECOND PAIR; til, FOOT OF THIRD PAIR; ot', MEROPODITE OF THIRD PAIR; 

 m", DACTYL OF THIRD PAIR ; t, TELSON, MALE AND FEMALE ; t', EXTREMITY OF TELSON ; 

 tl, UROPOD. 



ing dimensions: Fingers 1; total length 3.43; height 1.2G (Alba- 

 tross Station No. 23(52 ), the proportion of the length to the height 

 being only 2.7; but it is niuch more frequent to find the chela be- 

 coming more slender and this proportion equal to 2.9, 2.97, 3; the 



