94 PROCEEDINGS OF THE NATIONAL MUSEUM. tol.53. 



Trunk much swollen, bent into a sigmoid curve, the ventral surface 

 on the convex side, with a pair of short, swollen processes over the 

 bases of the egg strings; abdomen relatively large, swollen, and cylin- 

 drical, with a pair of lateral processes near its base ; egg strings long, 

 each coiled in a tight spiral ; eggs uniseriate and closely packed. 



Two pairs of antennae, second pair uncinate ; proboscis short, coni- 

 cal and nonretractile ; first maxillae apparently lacking, second pair 

 uncinate; four pairs of swimming legs, first two pairs biramose, 

 rami two-jointed and setiferous; third and fourth pairs uniramose, 

 rami one-jointed and setiferous. 



Internal generic characters of female. — Bilateral symmetry com- 

 pletely preserved; intestine narrowed through the neck, moderately 

 enlarged in the genital segment, and occupying the entire lumen of 

 the abdomen; rectum long and conical; ovaries on the dorsal surface 

 just in front of the concave flexure, their anterior third more or less 

 cylindrical, their posterior two-thirds much flattened and spread out 

 laterall}'" over the dorsal surface of the intestine; oviducts on the ven- 

 tral surface of the intestine and narrow ; processes over the bases of 

 the egg strings filled with muscles which probably give the latter 

 their coiled form ; glandular portion of the cement glands longer than 

 the ducts, both glands and ducts parallel but removed a little dis- 

 tance from the midline ; chitinogen layer of body wall well developed 

 Hlong the sides of the trunli and in the two pairs of lateral process^ 

 at the posterior end. 



Genus habitat. — This genus inserts its soft head and anterior neck 

 into the ventral aorta or bulbus arteriosus of its host, burrowing in 

 from the gill arches. The neck is flexed sharply where it enters the 

 aorta, and usually turned to one side, but there is no torsion. 



TTjpe of the genus. — Uaemohaphes cyclopterina (Fabricius), mono- 

 typic. 



{Eaemohaphes^ al/xa blood, and /So^t? dipped or dyed). 



KEY TO THE SPECIES. 



1. A series of lobed but unbranched processes on either side of the head and 

 four anterior thorax segments; trunk with sigmoid flexure and hiteral 

 processes (34 mm.)* cyclopterina (Fabricius), 17S0, p. 95. 



1. A series of profusely branched processes on either side of the head and four 

 anterior thorax segments; trunk nearly straight and without lateral 

 processes (16 mm.) i cnodis, new species, p. 97. 



1. A single pair of bilobed processes on either side of the cephalothorax, none 

 on the free thorax ; trunk with sigmoid flexure and lateral processes 

 (20 mm.) diccraiis, new species, p. 9S. 



^ Average total length of species. 



