506 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.10 



The genus is now known for only 3 species of which one is new. 



1. L. aberrans Monro (1936, pp. 193-195) off St. Paul de Loanda, 

 Angola, Africa 



2. L. fauveli Berkeley (1941, pp. 30-31) from Newport Bay, southern 

 California 



3. L. americana, new species 



Key to Species 

 1. Posterior parapodia with filiform branchiae; setigerous segments 1 

 and 2 uniramous, others biramous . . . . L. aberrans 



1 . Without branchiae 2 



2. Setigerous segments 1 to 6 uniramous, others biramous . 



. L. fauveli 



2. Only the first setigerous segment uniramous, others biramous . 



L. americana 



Loandalia americana, new species 

 Plate 63, Figs. 1-7 



Collections. — Biloxi, Mississippi in sandy beach (9) ; Grand Isle, 

 Louisiana, sandy shore ( 1 ) ; off San Jose Light, Guatemala in 12-13 fms, 

 Velero III station 930-39 ( 1 ). 



Length of a larger, complete (preserved) individual is 115 mm; 

 width in the widest region at the fourth and fifth setigerous segments is 

 3.3 mm without parapodia; farther back beyond the inflated region, at 

 about the tenth segment it is 2.3 mm without, 3 mm with parapodia. 

 Number of segments is about 111. The body is long and slender and 

 nearly cylindrical except for the short, inflated anterior region (pi. 63, 

 fig. 1 ). Color in life is not known but there is probably a pigmented pat- 

 tern since even preserved individuals show pale rust colored patches, seg- 

 mentally arranged, above and below the parapodial bases. 



The prostomium is small and inconspicuous and partly overarched by 

 the first few segments. It is a triangular, depressed lobe, widest at its 

 posterior margin and indistinctly separable in external view from the 

 paired palpi but obviously consisting of a pair of larger lateral lobes and 

 a median one. There are no antennae, eyes or other visible structures 

 (examined with both reflected and transmitted light). The palpi are 

 biarticulate, as in most other species of the family but the palpophore is 

 proportionately smaller and the palpostyle a minute papilla. In some 

 individuals the palpi, especially their styles, are more or less retracted so 



