218 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 15 



are present in P. felix and absent from P. ornatus. In Orbinia they are 

 present in most species but absent from O. johnsoni. In Haploscoloplos 

 they are absent from most species but present in H. fragilis. In Naineris, 

 Protoaricia, Scolaricia, Califia, new genus, and perhaps some others they 

 are altogether absent. In Scoloplos sensu stricto they are absent from 

 most species but present in S. armiger; in S. (Leodamas) they are 

 present in S. (L.) ohlini, S. (L.) cirratus and S. (L.) verax and 

 absent from others. 



Podial, like subpodial, lobes are conspicuous when present but their 

 occurrence has no generic significance. As the name implies, they are a 

 part of the parapodium and are located along the postsetal margin of 

 thoracic parapodia. They may occur as single or simply divided lobes or 

 as serrated fringed rows. Their greatest development is in some species 

 of Orbinia and Phylo. Subpodial and podial lobes have been called 

 ventral papillae, pectinated ventral folds, fringes, conical papillae, cirrus- 

 like appendages, short conical cirri and other descriptive terms. 



Interramal cirri are present in some species of Phylo, Orbinia and 

 Haploscoloplos. They are simple, cirriform, large to small processes 

 located between the notopodium and neuropodium of some posterior 

 thoracic and sometimes on anterior abdominal segments (pi. 20, fig. 2). 

 Their presence and distribution are specific. They have been called also 

 intermediate cirrus, intercirrus, cirruslike thread, subulate cirrus, cirri- 

 form branchia, external branchia of the notopodium, branchial languette, 

 conical languette, branchia, upper ventral cirrus and other descriptive 

 names (see Eisig, 1914, p. 174 for references). Their irregular distribu- 

 tion can be noted in certain species of some genera. They are absent 

 from all species of Scoloplos, Naineris, Scolaricia and PROTOARICI- 

 INAE. In Phylo they are present in P. felix, P. grubei, P. foetida, P. 

 michaelseni, sensu Monro ; they are absent from P. ornatus, P. nudus, 

 P. michaelseni, sensu Okuda, P. kupfferi and P. norvegicus. In Orbinia 

 there are interramal cirri in O. cuvieri and O. latreillii; there are none 

 in O. johnsoni and O. bioreti. In Haploscoloplos they are present in 

 H. fragilis and H. robustus but absent from H. elongatus, H. pana- 

 mensis, H. kerguelensis and possibly others. 



Lateral organs ("Seitenorgane" of Eisig, 1914, p. 240) are small, 

 oval, nonretractile elevations between notopodia and neuropodia in some 

 or all thoracic and abdominal (pi. 21, fig. 4) segments of some species 

 in some genera. Each mound has few to many stiff, short to long pro- 

 jecting hairs. Individual hairs are embedded in the epithelium and ter- 

 minate within in sensory cells, some of which are large, others small 



