NO. 1(559. AMERICAN SPECIES OF SYNALPHEVS—COUTIERE. 



27 



fingers of which are shorter (fino-ers 1, height 1.4, instead of 1.1). 

 The feet of the third pair are also more massive (meropodite -5.8 

 times as long as wide instead of 3. 74), and the feet of the second pair, 

 as in S. latastei, have the distal chela fooble and the first segment of 

 the carpus etiiial in length to the four following ones. 



Fig. 8. — Synalpheis latastki tenuispina. a, frontal and antennal kegion ; c, carpo- 



CERITE ; A'. LAIUiK CHELA; A'', SMALL CHELIPED OF FIRST PAIR; I, FOOT OF SECOND PAIR; 

 m, MEROPODITE OF THIRD PAIR. 



Desterro, Brazil; Fritz Miiller; one female 30 mm. long (Paris 

 Museum). 



SYNALPHEUS APIOCEROS, new species. 



On the Atlantic coast of America the Paulsoni group is repre- 

 sented by additional species; one of them, S. foumsendi, described 

 farther on, is, up to the present time, the most aberrant form of the 

 group known; it possesses no spine in the superior angle of the ba- 

 sicerite, and thus closely resembles S. pairmeomeris of the Neomeris 

 group; this resemblance is further accentuated by the fact that the 

 dactyls of the third, fourth, and fifth pairs in the preceding species 

 2iossess only a trace of triunguiculation. Thus these two species mark 

 the varietal limits of the two groups of forms. 



The other species, S. apioceros^ also new, is, on the other hand, very 

 typical. It is of special interest because of the great number of allied 

 forms, American or Indo- Arabic, which may be approximated to it. 



The rostrum is equal to the lateral teeth, from which it is separated 

 by intervals acute at base ; the antennule is about 4.0 times as long as 

 wide, but its basal article is 2.2 times as long as the median, and con- 

 siderably exceeds the frontal teeth. This is a character which dis- 

 tinguishes this species at once from S. lockingtoni. 



