370 



EUNICBA LABIDOGNATHA NUDA. 



service in the subdivisions. In arranging the representatives of the genus Lumbrico- 

 nereis he made use of the structure of the jaw-plates and the shape of the head, or in 

 sections b and o the condition of the bristles. He gives Lumbrlco nereis four jaw-plates, 

 the next genus Larymna having five plates. Under the section b, just mentioned, there 

 are large winged bristles, and the maxillae -have elongated, slender posterior appendages. 

 The mandibles (lamina ventral is) are horny, black, bilobed in front, the short limbs 

 united or split. Under this head come Drilonereis and Arabella with four pairs of jaws, 

 and Avacoda and Maclovia with five pairs of jaws. Unlike Kinberg, he regarded the 

 biannulate buccal region as a single segment. 



The Lumbrinereidae formed one of the families of Levinsen's Euniciformia vera 

 (1883) following the Onuphidae, a position in keeping with their structure. Benham 

 includes the group under his Eunicidae, a family of the Nereidiformia. 



One of the most recent classifications of the group is that of Gravier, who has done 

 excellent work, especially amongst the foreign Annelids : 



Capillary bristles [Digital branchiae fixed to setigerous lobe 



[Four pairs of jaws . 

 No branchiae - Five pairs of jaws . 



i 



f [One pair of jaws (hooked) 



CD 



^ 



accompanied by 

 hooks or com- 

 pound bristles 



Only capillary 

 winged bristles 



Four pairs of jaws 



Four or five pairs 

 of jaws ; two 

 first 

 achetous 



segments 



One pair of jaws not 

 hooked, two filiform sup- 

 ports 



Jaws of the third and 

 fourth pairs reduced to 

 hooks 



Ninoe, Kinberg. 

 Lumbvie oner els. 

 La rymna (including 

 Zygolobus, Grube) . 

 La i rt i id a, Kinberg. 

 Noto cirrus, 



Schmarda. 







o 



CD 

 O 



.3 



Three antennae in- 

 serted on pos- 

 terior part of 

 prostomium 



Jaws of the third and 

 fourth pairs denticulated m 

 plates ; jaws of second 

 pair unequal 

 Five pairs of jaws First segment achetous . 

 Supports of upper 

 jaw long and fili- 



foi 



mi 



Four eyes, six pairs of jaws 

 Two eyes, five pairs of jaws 



Drilonereis, Clapa- 

 recle (De St. 

 Joseph, char, 

 emend) . 



Arabella, Grube 

 (De St. Joseph, 

 char. emend., 

 Maclovia). 



A racoda, Schmarda. 



Danymene, Kin- 

 berg. 



Halla, A. Costa. 



Support of upper jaw short — in form of a plate Lysaretea, Kinberg. 



Three antennae covered by the prostomium ; nucal organ forming Aglaur ides, &&vigny 



S-i 



m 



o 



^ 



w. 



en 



CD 



Pi 



-4^ 



CD 



• r— 1 



m 



s< 



o3 



s 



c3 



o 



P-i 



o 



two voluminous organs behind antennae 



iNo antennae, no nuchal organs 



f Lower jaw much developed, parasitic or 



commensal on Syllideans 

 Lower jaw much reduced, a parasite or com- 

 - mensal of Bonellia 

 Parasitic or commensal in Terebellides Stroernii Edema tody pies, 



Wiren 



Four eyes 



No eyes 



and Ehlers. 

 CEnone, Savigny. 

 Labrorostratus, De 



St. Joseph. 

 Oligoglia fit us, Spen- 

 gel. 



