ART. 5. NORTH AMERICAN PARASITIC COPEPODS WILSON. 37 



Richiardi ^^ gave a brief description, without figures, of a new 

 species of Lernanthropus^ which he named micropterygis. Goggio 

 in the paper just referred to (1906) claimed to recognize Richiardi's 

 species, and gave figures of male and female adults. He also claimed 

 that Brian's species thompsoni^'^ was a sj'nonym of micropterygis. 



Brian himself in his Copepodi Parassiti dei Pesci d'ltalia, 1906 

 (p. 66), made thompsoni a synonym of gisleH., but later published an 

 error slip stating that this was a mistake and that it should be a 

 synonym of micropterygis. In this same paper (p. 65) Brian 

 claimed that Heider's species " hr^yeri.^ var?'' was a synonym of 

 Richiardi's hrevis^ but Goggio, in the Pisa paper already referred to, 

 identified hrevis very differently and gave good figures of both sexes. 

 If his interpretation is correct then Heider's name must be retained 

 and does not become a synonym. 



Heider, Valle, and Brian have each stated that probably the spe- 

 cies described by Heller as trigonocephalus is identical with the one 

 established by Kr0yer as scribae. Heller frankly acknowledged 

 that the two species had many similarities, but contended that they 

 differed enough to warrant keeping them separate, 



LERNANTHROPUS CAUDATUS. new species. 



Plate 1, figs. 9-11 ; plate 2, figs. 12-15. 



Host and record of specimens. — Three adult females were obtained 

 from the gills of the sheepshead, Archosargus prohatocej)halus, at 

 Beaufort, North Carolina, July 25, 1905, The best specimen was 

 selected as the type of the species with Cat. No. 54061, U.S.N.M. ; the 

 other two become paratypes with Cat. No. 54062, U.S.N.M. 



/Specific characters of female. — General form short and thickset; 

 cephalothorax narrowed anteriorly, swollen posteriorly, the lateral 

 lobes produced considerably in front of the central margin. Anterior 

 portion of dorsal plate produced into a large lateral lobe on either 

 side, which curves over ventrally, leaving prominent rounded corners 

 both anteriorly and posteriorly. Posterior portion of plate nearly a 

 circle in outline, its margin evenly and smoothly rounded. 



First antennae indistinctly six- jointed, not visible except in a 

 ventral view. Second antennae of the usual pattern, the stout ter- 

 minal claw strongly curved. Mouth tube rather small; maxillae 

 also small and weak; second maxillae large and powerful; maxilli- 

 peds with a stout terminal claw nearly as long as the basal joint and 

 jointed once near the center. First legs small and hidden beneath 

 the maxillipeds, the endopod a conical knob tipped with a single 

 long spine, the exopod flattened into a lamina, tipped with five short 



^ Process! verbali Soc. Toscana Sci. Nat., Pisa, vol. 4, 1885, p. 82. 

 "Atti. Soc. Ligustica Sci. Nat., vol. 9, 1898, p. 17, pi. 3, fig. 16. 



