PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 77 



number of these crosslines on the left and right sides of the body 

 differs. The lines are not symmetrically disposed. It may be re- 

 marked that they divide the body, at least at the sides, into eight 

 parts, situated one behind the other. Here and there, at the inter- 

 sections of the longitudinal and transverse lines, small triangular 

 areas are formed. 



11 



10 



FiGUKH 6—11. FABA GLABEAj female^ 6, ON host; a = THOEACOPOD VIII; 7, FROM THE 



LEFT SIDE ; 8, FROM THE EIGHT SIDE ; 9, DORSAL VIEW ; 10, VENTEAL SIDE ; 11, EX- 

 TREMITY OF TRUNK 



HEPTALOBUS, new genus 



This genus is founded on the female of the species, parasitic in the 

 branchial cavity of Spirontocaris hiunguis Rathbun and Spironto- 

 caris suchleyi (Stimpson). Although forms with seven lobes and 

 fornix with j&ve lobes are found, we regard both as belonging not 

 only to the same genus, but also to the same species, as both forms 

 are found on the same host, and, except for the development of 



