OXYSTOMATOUS AND ALLIED CRABS OF AMERICA 27 



palm in length and are furnished with numerous teeth; apex of 

 immobile finger bent over that of dact}^. Ambulatories fringed with 

 long hair; propodi of first three pairs drawn out into sharp ridgelike 

 processes; fourth pair with dactylus less strongly curved. (After 

 Henderson.) 



Habit. — Sand burrowing. 



Color. — ^With splotches of vinaceous-cinnamon. (Schmitt.) Gen- 

 eral color white; two spots in front pink, two at middle hght brown; 

 two behind light green. (Henderson.) 



Measurements. — Female (45518), length of carapace 22.2, width 

 14.3 mm. 



Range. — Florida to Bahia, Brazil; Panama (Pacific); 10 to 60 

 fathoms. 



Material examined. — See table 6, page 28. 



Subtribe Dromiacea De Haan 



Dromiacea De Haan, Crustacea Japonica, p. 102, 1839. 



Carapace subglobose or subquadrate, frontal region narrow. Last 

 one or two pairs of legs subdorsal in position and also of small size. 

 Abdomen folded under thorax, the penult segment usually without 

 appendages; five pairs of appendages in female, first pair rudimentary. 

 Lateral thoracic apodemata united in a common center, forming a 

 sternal canal. External maxdlipeds with merus and ischium sub- 

 quadrangular. 



KEY TO THE SUPERFAMILIES OF THE SUBTRIBE DROMIACEA 



A'. Sternum of female with longitudinal grooves. Vestiges of sixth 

 abdominal limbs usually present. Gills 14-20 on each side. 

 Eyes usually completely sheltered by orbits when retracted. 

 No lineae anomuricae DROMIIDE A (p. 27) 



A^. Sternum of female without longitudinal grooves. No vestiges of 

 sixth abdominal limbs. Gills 8-14 on each side. Eyes incom- 

 pletely or not at all sheltered by orbits when withdrawn 



against body. Lineae anomuricae usually present 



THELXIOPEIDEA (p. 61) 



Superfamily Dromhdea Alcock 



Dromiens Milne Edwards, Histoire naturelle des Crustaces, vol. 2, p. 168, 



1837. 

 Dromidea Henderson, Voyage of H. M. S. Challenger, vol. 27, Anomura, p. 2, 



1888. 

 Dromiidea Alcock, Journ. Asiat. Soc. Bengal, vol. 68, p. 125, 1899. 



Carapace sometimes longer than broad, often broader than long. 

 Eyes and antennules almost always retractile into common orbito- 

 antennulary pits, the lower wall of which is formed about equally 

 by the basal joints of the antennae and antennules and by a suborbital 

 spine or dentiform lobe. These pits often show traces of a division 

 into two fossae. Eyestalk short and stout. Epistome triangular, 



80232—37 3 



