NO. 1G59. AMERICAN SPECIES OF SYNALPHEUS—COUTIERE. 



29 



wide. The dactyl is slender, about 3.2 times as long: fts wide, with the 

 ventral hook relatively shorter than in S. lockhigtoni. 



The telson has its posterior angles accented, but not spinous. The 

 eggs give rise to zoea larvae. 



Localities : 



Jamaica, Albatross. 



Marco, Florida, 1 to 3 fathoms, H. Hemphill (Cat. No. 7000). 



Marco, Florida, in sponges, H. Hemphill (Cat. No. 6970), type. 



The species dift'ers, then, from S. lock'nigtonl in many ways; 

 the rostrum and stylocerite are shorter, the basal article of the 

 antennule is longer, the carpocerite of diiferent form and pro- 

 portions, the maxillipeds shorter, the large chela is spinous on the 

 palmar border, the small cheliped is more slender, its carpus spinous 

 and the second and third pairs are more slender. 



One is induced to separate from S. aploecros a whole series of forms 

 of different geographic ori- 

 gin, probably constituting 

 as many distinct species. 

 They differ, nevertheless, 

 very little from typical 

 specimens and correspond 

 well to what are called 

 " petites especes." 



SYNALPHEUS APIOCEROS 

 SANJOSEI, new subspecies. 



This subspecies is repre- 

 sented only in the collec- 

 tion of the Museum at Paris 

 by some specimens (male 

 and female) collected by 

 M. Digiiet. It is from San Jose Island, Lower California, and is as 

 distinct from S. lochingtoni of California as is the preceding, from 

 which it differs in the following details : 



The rostrum is usually a little longer than the lateral spines; the 

 stylocerite scarcely surpasses the basal article of the antennule; the 

 lateral spine of the scaphocerite is notably shorter than the carpo- 

 cerite ; the carpus of the small cheliped is unarmed above. The small 

 chela has these proportions : Fingers 1 ; total length 2.56 ; height 1.1 ; 

 T. L. : H.=2.34 :1 ; it is thus more massive than in S. apioceros, where 

 the last proportion is 2.95 :1. 



The meropodite of the third pair is 3.56 times as long as wide. 



FlU. 10. — SyNALPHEIS APIOCEROS SANJOSEI. rt, 

 FKONTAL AND ANTENNAL REGION ; K, SPINE OF 

 LARGE CHELA ; K" , CARPUS OF LARGE CHELIPED ; 

 k', SMALL CHELIPED OF FIRST PAIR ; m, ilEROPO- 

 DITE OF THIUD PAIK. 



