Pomona College, Claremont, California 17 
minal part sharply set off from the basal. Segments of abdomen irregularly multian- 
nulate, sulei deep and surface usually appearing strongly rugose and uneven. 
Length near 160 mm.; greatest width of abdomen, 1.4 mm. 
Type—M. C. Z. 2, 164. 
Taken in sand and in growths of eel grass. The color is noted as reddish in life, 
as usual in the family. 
SPIONOIDEA 
Morants gen. nov. 
Body with an anterior region of fifteen setigerous somites separated from a larger 
posterior region by a specialized somite, the sixteenth. Prostomium with a lateral 
process or horn on each side in front, notched in front at middle. Eyes none in geno- 
type. Dorsal cirri present in addition to branchie on the first four setigerous somites. 
Notopodia with simple capillary sete throughout. Anterior neuropodia with capillary 
sete, but others also with crochets. Anal. cirri two. 
Genotype—M. duplex sp. nov. 
Morants duplex sp. nov. 
Palpal processes lost from type. Proboscis as protruded short, distally expanded 
over proximal region. Parapodia dorsolateral in position, the anterior ones very thick. 
Principal postsetal lobe rising above into a branchial process which is short anteriorly 
but in posterior region is much longer, slender and subulate. Mesad of the branchial 
process of each parapodium of the first four pairs is a cirrus or cirriform process. 
The inferior sete of the most anterior parapodia much shorter than the dorsals, 
strongly curved. In the first notopodial fascia a much stouter, aciculiform, sete which 
is uncate. Crochets with strongly narrowed neck; with two curved teeth at distal 
end above the beak which is decurved; in posterior region few in number, commonly 
four in a series. Anal cirri slender, filiform, much longer than the preceding branchiz; 
one in the type has a short spur near its base. Total number of segments about one 
hundred and sixteen. ; 
Length, 21.5 mm. 
Type—M. C. Z. 2, 165. 
Balboa. 
The tubes adhere closely to the body. Their walls of fine sand. 
AMPHARETID-© 
Schistocomus gen. nov. 
Like Phyllocomus in lacking tentacles and postbranchial spines, in bearing fifteen 
pairs of fascie of capillary sete and four pairs of branchie. It differs from that 
genus in having the branchie of two types, one pair being of the ordinary, smooth, 
simple, subulate form and the other three with the edges divided, two pinnately, 
bearing two close series of lamellar branches, and one with an essentially single 
series of branches in the genotype. 
Genotype—S. hiltoni sp. nov. 
Schistocomus hiltoni sp. nov. 
The body has the ordinary general form, being widest near the fifth setigerous 
segment from where it narrows continuously to the slender, pointed cauda. Dorsum 
convex, venter less so, the latter with a double median longitudinal furrow in the 
