702 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 47. 



BracMella, but added nothing further in the way of description, and 

 thus we are left mth insufficient data to locate it intelUgently. 



B. rostrata Kr0yer, 1837, p. 207, differs so radically in both sexes 

 from BracUella that it is made the type of a new genus, Parabrach- 

 iella (see p. 714). 



There are thus five species which are mere names, thi-ee which can 

 not be satisfactorily located, and 16 which must be transferred to 

 other genera, including six which become new genus types. 



TABLE OF SPECIES. 



1. Only two posterior processes, dorsal to the egg strings 2. 



1. Only two posterior processes, ventral to the egg strings 3. 



1. Four posterior processes, two dorsal and two ventral 7. 



2. Posterior processes pear-shaped with a narrow pedicel; first maxillae unipartite; 



both rami of second antennae unsegmented lopMi Milne-Edwards, 1840. 



3. Posterior processes cylindrical, widely separated; first maxillae tripartite ; exopod 



(ventral) of second antennae two-jointed concava Wilson, 1913, p. 703. 



3. Trunk ovoid, considerably longer than wide; posterior processes minute and con- 

 ical; genital process present '*• 



3. Trunk ovoid, about the same length and width; posterior processes larger; no 

 genital process _ ^. .... 5. 



3. Trunk swollen, wider than long; posterior processes large and laminate; genital 



process rudimentary ^^ 



4. Second maxillae as long as the cephalothorax, cylindrical and slender; first an- 



tennae four-jointed and slender bisjnnosa Nordmann, 1832. 



4. Second maxillae half as long as the cephalothorax, cylindrical and slender; first 

 antennae three-jointed and stout exigua Brian, 1906. 



4. Second maxillae half as long as the cephalothorax, stout and flattened; first an- 



tennae three-jointed and slender; posterior processes laminate. 



mitrata, new species, p. 709. 



5. Posterior processes cylindrical, bluntly rounded; second maxillae short and stout; 



egg strings as long as the trunk pinguis, new species, p. 710. 



5. Posterior processes conical, with an acute point; second maxillae long and slender; 



egg strings twice the length of the trunk nitida, new species, p. 711. 



6. Trunk irregular, covered with lobes and processes, emarginate posteriorly; first 



antennae short and two-jointed triglae Claus, 1860. 



6. Trunk smooth and regular, rounded posteriorly; first antennae four-jointed, 



swollen - obesa (Kr0yer), 1837, p. 701. 



7. The fom: posterior processes about the same length 8. 



7. Ventral posterior processes distinctly longer than dorsal 11 • 



7. Dorsal posterior processes distinctly longer than ventral 12. 



8. Size large (10 mm.); head enlarged and covered with a dorsal carapace; second 



maxillae separate to their tips 9. 



8. Size small (5 mm.); head not enlarged, no carapace; second maxillae fused for 



their entire length 1*^- 



9. Genital process half as long as posterior processes; maxillipeds huge, each nearly 



as large as the entire head; second maxillae smooth... chevreuxii Beneden, 1891. 

 9. Genital process minute; maxilUpeds of normal size; first antennae two-jointed; 



second maxillae much wrinkled appendiculosa (Kr^yer), 1863, p. 712. 



10. Ventral processes close together, dorsal ones far apart; genital process present; 



second maxillae smooth appendiculata (Kr0yer), 1863. 



10. Ventral processes close together, dorsal ones far apart; genital process present ; 



second maxillae wrinkled hostilis Heller, 1865. 



