NO. 1659. AMEUfCAN SPECIES OF SYNALPHEUS—COUTIERE. 93 



Port Jackson, New South Wales (type) ; A. McCulloch, for whom 

 the species is named. South Aclehiide, South Australia; H. W. 

 Baker. 



Type in Paris INIusenm. 



SYNALPHEUS LOPHODACTYLUS, new species. 



Differs from S. hhiiKjulcidattdi Stimpson in having the basicerite 

 unarmed above, the posterior angles of the telson spinous, and the 

 movable finger of the small chela bearing a dorsal brush of hairs and 

 not some lateral bunches. Furthermore, the antennular peduncles 

 and the carpocerite are short (ratio 1 :4 for both), the antennal scale 

 is large, the feet of the third pair are slender (proportions of the 

 meropodite 1:-1:.5 instead of 1:8 in S. hlunguiculatus ca-ilipcs Cou- 

 tiere, which approaches it the most in this regard). 



Diego Gai'cia, Chagos Archipelago; Percy Sladen Trust Expedi- 

 tion. 



Type in Paris Museum. 



SYNALPHEUS SLADENI, new species. 



Differs from all the other species of the L.kvimanus group by the 

 considerable prominence of the frontal border, the basicerite being 

 feebly spinous below, the antennal scale large, the large chela cylin- 

 drical, almost 3.5 times as long as high, the feet of the third pair 

 slender (proportions of the meropodite 1:5.4), and the telson very 

 narrow with posterior right angles. It approaches the species of the 

 CoMATULARUM gTOup, while the small chela is altogether comparable 

 to that of /S. longicarpii)^. 



Cargados Carajos, western Indian Ocean ; Percy Sladen Trust 

 Expedition (to which the specific name is dedicated). 



Type in Paris Museum. 



