no. IGSO. AMERICAN Sf^EClES OP SY}fALl*HBV8—C0VTiEkE. 9 



(' '. Carpus of the small cheliped measuring 0.5 of the chela. 



/\ Carpocerite 4..^) times as long as wide S. hrooksi. 



/^ Carpocerite r>.r> times as long as wide iS. brooksi strcpftu-cro,'^. 



e'. Carpus of the small elielliu'd measuring 0.53 to 0.57 of the chela; 



carpocerite 4.4 times as long as wide /S. brooksi clcuthrrw. 



a '. Carpus measuring less than 0.5 of the small chela (0.43 to 0.4). 



b \ Meropodite and carpus of tlie third pair excavate, with a transparent 



outer margin 8. androsi. 



&^ Meropodite of the third pair not excavate; carpus shorter than the pro- 

 podite. 

 c\ Brush of hairs of the small chela very reduced (about 30 hairs in 6 



rows) ; antennal scale present in the male only 8. paraneptunus. 



c^ Brush of hairs of large size, composed of 15 to 20 rows. 

 d\ Carpocerite 3.5 to 4 times longer than wide; meropodite of the tliird 



pair 4 to 4.5 times longer than wide 8. sanctUhoma'. 



d ^ Carpocerite 5.2 to 6 times, meropodite 3 to 3.5 times, longer than wide. 



e'. Antennal scale present in both sexes 8. goodei. 



e^ Antennal scale absent (or extremely narrow when it is exception- 

 ally present) S. goodei occidcntalis. 



DISTRIBUTION AND DISCUSSION OF SPECIFIC CHARACTERS. 



Table of distribution of the species of the genus Synalpheus. 

 COMATULARUM GROUP. 



NEOMERIS GROUP. 



S. neomeris<\e Man. 



S. neomeru streptodactylus Coutiere. 



S. nilnndensis Coutiere. 



& nilandensis oxyceros Coutiere 



.S. iiravici-i Coutiere. 



S. pococki Coutiere. 



.S'. merospiniffrr Coutiere. o 



S.foKSor Paulson. 



S. trio7u/chis Coutiere. 



.S'. triungiUridatus Paulson. 



.S. bakeri Coutiere 



S. phymcheles Coutiere. 



S. dcmani Borradaile. 



S. Charon Heller. 



S. o^iosM.s Coutiere. 



S. paraneornrris Coutiere 



S. paraneomrrisprolatus, new name 

 (=.S'. parancoineris oxyceros Cou- 

 tiere). 



S. heroni Coutidre 



iS. heinpldlli Citutiere. 



S. hemphilli longicornis Coutiere. 



S. nobilii Coutiere. 



>S. fntznmlleri Coutiere. 

 S.fritzmidleH elongatus Coutiere. 



S. sanlucasi Coutiere. 



a For descriptions of this and otlier new e.xtra- American .species, see pages 89 to 93. 



