NO. 1 hartman: polychaetous annelids 31 



Eulagisca panamensis, new species 



Plate 3, Figs. 38-42 



Collection, — 436-35 (Holotype). One specimen. 



Length 40 mm; width 6 mm without, 11 mm with parapodia, 17 

 mm with setae. Form broad, depressed, harmothoid. Prostomium with- 

 out prostomial peaks, the paired antennae inserted subterminally, the 

 median antenna inserted at the anterior margin of the prostomium, dor- 

 sal to the paired antennae. Facial tubercle present but not conspicuous. 

 A triangular flap (=nuchal hood) extends toward the posterior margin 

 of the prostomium but does not cover it. 



Elytra 15 pairs, completely covering dorsum; their surface smooth, 

 margin entire; the outer edge turned up by the dorsally directed noto- 

 podial fascicles. Anterior margin concave slightly (pi. 3, fig. 42). They 

 are pale save for a semilunar, rust-colored area over the posterior half, 

 around the elj^tral scar, but leaving a pale posterior margin. Styles of 

 dorsal cirri, peristomial cirri, and prostomial antennae dark brown with 

 pale terminal tips. Ventral cirri pale. 



Parapodia well developed, the acicular lobes taper and terminate in 

 points (pi. 3, fig. 39). Notopodial setae numerous, some finer, others 

 about as heavy as the neuropodial setae; all are nearly smooth, with 

 faint indications of teeth along the cutting edge (pi. 3, fig. 40). Neuro- 

 podial fascicle stout, the dorsalmost setae similar to the ventralmost 

 except that the latter are somewhat smaller; tip entire (pi. 3, fig. 41) 

 or with a minute subterminal tooth (pi. 3, fig. 38) ; with transverse 

 rows of pectinae. 



The presence of some bifid neuropodial setae in this specimen mini- 

 mizes the importance of this character in separating Eulagisca Mcintosh 

 from Allmanniella Mcintosh. Monro (1936, p. 91) has already indi- 

 cated the affinities of these 2 genera. 



Eulagisca panamensis differs from E. corrientis Mcintosh, the only 

 other species in this genus, in that the notopodial setae are not notably 

 stouter than the neuropodial setae; also, a few of the latter have a 

 minute subterminal tooth. The elytra in E. panamensis are rather firmly 

 attached, in E. corrientis they are readily detached. E. corrientis is 

 known from the southwest Atlantic, in depths of 150-600 fms. ; E. pana- 

 mensis was taken from the intertidal zone on the Pacific side of Panama. 



Holotype. — AHF no. 3. 



Distribution. — Pifias Bay, Panama. Shore. 



