LEODICE SEGREGATA. 237 



The total length is near 330 mm. with a maximum width of 3.5 mm. The total 

 number of somites is in the neighborhood of seven hundred. The first branchia 

 detected was near somite CCCXV. The mandibles project prominently as 

 usual; each is white along the ectal border and in a narrowing stripe along the 

 anterior edge, being elsewhere dilute brown. The maxillae are black, not 

 edged with white as in leucodon Ehlers, with the teeth typical. The antennae 

 are of moderate length but decidedly longer than represented by Ehlers for his 

 leucodon, the types of which were taken at Juan Fernandez. The structure of 

 the setae seems to be typical. 



This species, which is very closely allied to the famous palolo worm (L. 

 viridis), has an exceptionally wide distribution, having been previously recorded 

 from the Mediterranean, Madeira Island, West Indies (Porto Rico), Juan 

 Fernandez Island, PhiHppines, Australia, East Africa, Gulf of Persia, and 

 Red Sea. 



Locality. Off Panama: Taboguilla Island. 31 October, 1904. 



One specimen taken on the shore. 



LeODICE SEGREGATA, sp. nov.^ 



Plate 54, fig. 1-5. 



Type incomplete; about 114 mm. long; maximum width of body, 7.1 mm. 

 Number of segments in the incomplete specimen one hundred and eighteen. 



Prostomium broad, deeply sunken in peristomial collar to bases of tentacles, 

 anteriorly deeply incised and bilobed to form the thick, bluntly rounded palpi. 

 Each palp divided by a shallow transverse groove into a more prominent ventral 

 and a smaller dorsal lobe. Tentacles in a transverse row in which the two laterals 

 on each side are close together but not contiguous, the median separated from 

 the nearest lateral on each side by a wider space. Tentacles smooth throughout, 

 not at all annulated or articulated and with no distinct ceratophore. Median 

 tentacle reaching to somite VII; outer paired tentacles much stouter, reaching 

 only somite II. 



Peristomium large, equaUing in length the two and one half succeeding 

 somites; on each side weakly longitudinally furrowed, below the furrow the 

 prominent, thickened lower lip which is crossed longitudinally by a number of 

 impressed lines or sulci, but the free edge of lip not crenulated, mesally straight. 



1 segregare, to separate. 



