no. 1404. PARASITIC COPEPODS—C ALIO IDM— WILSON. 647 



papillated prominence instead of a .spine. Of the three terminal 

 spines the outer, which is the smallest, has a peculiar knife-blade shape. 



Total Length 7.875 mm. Length of the carapace 5.5 mm.; width of 

 the same 4.3 mm.; length of genital segment 1.45 mm.; length of 

 abdomen 0.75 mm. 



Color not given. 



(/•obitst'its, stout, strong.) 



This species was founded by Kroyer on two male specimens obtained 

 from a species of Raja off the Greenland coast. It is not as well 

 defined as the preceding species, but seems fairly well characterized 

 by the skin protuberances on the genital segment and b} 7 the 

 bipartite furca. 



Genus ANURETES Heller. 



Carapace large and shield-shaped, as in the preceding genera. 

 Frontal plates well defined, without sucking disks. Second maxillae 

 small, simple, and straight. Second maxillipeds large and very power- 

 ful. First and fourth thoracic legs nniramose, second and third bira- 

 mose, the rudiments of the fifth pair large and prominent. Genital 

 segment large, well rounded, emarginate posteriori} 7 . Free thorax 

 segment small and without dorsal plates. Abdomen entirely lacking, 

 the anal lamina? only left, attached to the ventral surface of the genital 

 segment. Egg strings as in Caligus. 



{Amiretes, ocv privitive, ovpd, tail.) 



KEY TO THE SPECIES. 



Genital segment semilunar, deeply cut posteriorly; fourth legs small, three-jointed, 

 four spines close together at tip heckelii, p. 647. 



Genital segment almost circular, with shallow, triangular posterior depression; fourth 

 legs long, first spine removed some distance from the others perplexus. 



ANURETES HECKELII Kroyer. 



Plate XXV, figs. 316-321. 



Lepeophth&rus heckelii Kroyer, 1863, p. 110, pi. vu, figs. 4, a-h. 

 Anuretes heckelii Heller, 1865, p. 186. — Bassett-Smith, 1899, p. 457. 



/-', ma I, . —Carapace somewhat longer than the rest of the body, about 

 as wide as long. Frontal plates distinct, but narrow and only slightly, 

 emarginate at the center. Posterior sinuses broad and shallow; median 

 lobe about half the entire width, projecting scarcely at all beyond the 

 lateral lobes. 



Invc segment narrow and proportionally long with almost parallel 

 sides. Genital segment two-thirds as long as the carapace and three- 

 fourths as wide, its sides strongly curved and projecting backward at 

 the corners as a pair of stout papillae, representing the fifth legs. 

 Between these papillae the posterior border of the genital segment is 

 slightly convex, but the projecting papilla 1 give this border a deeply 



