NO. 1404. PARASITIC COPEPODS—CALIGIDM-WILSON. 647 



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

 spines the out(M', which is the smaHest, has a peculiar knife-blade shape. 



Total lenoth 7.875 mm. Lenj^th of the carapace .5.5 mm.; width of 

 the same 4.^5 mm.; length of genital segment 1.45 mm.; length of 

 a])domen 0.75 mm. 



Color not given. 



{rohushis, stout, strong.) 



This species was founded bvKro^^er on two male specimens obtained 

 from a species of Iiaja 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 by the 

 bipartite furca. 



Genus ANURETES Heller. 



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

 Frontal ])lates well defined, without sucking disks. Second maxilla? 

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

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

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

 segment large, well rounded, emarginate posteriori}'. 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 Callgus. 



{Amiretes, ocv privitive, ovpa^ tail.) 



KEY TO THE SPECIES. 



Genital segment semilunar, deeply cut posteriorly; fouj-th 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 jjerplexus. 



ANURETES HECKELII Kroyer. 



Plate XXV, figs. .•il6-321. 



Lepeophtheirus heckelii Kr(")Yer, 1S6.3, p. 110, pi. vii, figs. 4, a-h. 

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



Female. — 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 wndth, projecting scarcely at all beyond the 

 lateral lobes. 



Free segment narrow and proportionallj^ 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 papillee, representing the fifth legs. 

 Between these papilUe the posterior border of the genital segment is 

 slightl}' convex, but the projecting papilla^ gi\'e this border a deeply 



