290 



ANNELIDA 



L. fucata* Ehlers. Atlantic palolo worm (Fig. 461). Length up to 

 35 cm., the atokal portion being about two-thirds the whole; color 

 brownish or yellowish: West Indies and Gulf of Mexico; living in coral 

 rock and swarming within 3 days of the full of the July moon. 



2. DIOPATRA Ehlers. Peristomium with 



1 pair of cirri; 5 tentacles in a transverse 

 curved line and 2 small palps present; gills 

 beginning several segments back from the 

 head: many species, 1 in New England. 



D. cuprea (Bosc) (Fig. 462). Large 

 worms up to 30 cm. long and 10 mm. wide 

 which live in parchment-like tubes extending 



2 or 3 feet in the sand, the upper 2 or 3 inches 

 of the tube projecting into the water and 

 thickly covered with shells, etc.: common in 

 shallow water and between tide lines; from 

 South Carolina to Cape Cod. 



3. MARPHYSA Quatrefages. Peristomium 

 consists of 2 segments, and is without cirri; 

 5 tentacles in a transverse row, 2 small palps 



and 2 eyes present; gills begin about the 20th segment but are variable 

 in this respect: 1 species at Woods Hole. 



M. leidyi Quatr. (M. sanguinea Leidy) (Fig. 463). Length 20 cm.; 

 color yellowish or brownish-red; tubes not so perfect as those of pre- 

 ceding worms: under stones and in the sand in shallow water; from 

 North Carolina to Vineyard Sound. I 



4. LTTMBRINEREIS Blainville (Lum- 

 briconereis Ehlers). Head conical, without 

 appendages or eyes ; peristomium consist- 

 ing of 2 segments; dorsal cirri flat, and 

 parapodia small: many species, 5 at 

 Woods Hole. 



L. tennis (Verrill). Body filiform 

 up to 30 cm. long, with the diameter of 

 a coarse thread, bright red in color: Vir- 

 ginia to Massachusetts; burrowing in 

 mud and under stones. 



5. ARABELLA Grube. Similar to 



Fig. 461 Leodice fucata 



(Mayer). A, entire worm; 



B, head end. 1, tentacles ; 



2, palp ; 3, peristomium ; 4, 



peristomial cirri ; 5, gills. 



Fig. 462 



Fig. 463 



Fig 462 Diopatra cuprea ven- 

 tral view of anterior end (Verrill). 

 1, tentacles ; 2, peristomial cirrus. 

 Fig. 463 Marphysa leidyi ante- 

 rior end (Verrill). 



Lumbrinereis but with usually 4 eyes in a transverse row on the 

 prostomium: several species, 2 in the Woods Hole region. 



* See "The Annual Breeding-Swarm of the Atlantic Palolo," by A. G. Mayer, 

 Carnegie Inst., Wash., Pub. 102, 1908. 



