10 LEODICIDyE OF THE WEST INDIAN REGION. 



Gravier !900, p. 217) reaches essentially the same results as Grube, though 

 he objects to the use of the maxilla for classification on the ground that it may be 

 broken and is therefore not a constant feature. His classification is as follows: 



Family Etjnicea. 



One dorsal and one ventral cirrus. 



No ventral cirrus. 



Upper jaw of a few pieces, generally three. 



Eunicidai. 

 Upper jaw of numerous small teeth arranged 



longitudinally. Staurocephalidce. 



Dorsal cirrus rudimentary or foliaceous. 

 Lumbriconereidce. 



Though based on different anatomical characters these two classifications of 

 Grube and of Gravier agree in the content of their different subdivisions and they 

 seem to me perfectly satisfactory. Making certain verbal changes, I would adopt 

 them as follows: 



Family LEODICIDiE. 



Annelida varying very much in size, with or without prostomial appendages, ej'es, nuchal and parapodial cirri. 

 Two or four anal cirri present. Parapodial gills present or absent. Parapodium sesquiramous. Jaw apparatus of 

 maxilla and mandible, the former of two or more rows of plates, mostly toothed. 



Subfamily LeodiciniE. 

 With dorsal and ventral parapodial cirri, with or without nuchal cirri and parapodial gills. Prostomium 

 with from one to seven tentacle-like appendages, and one pair of palps more or less fused with the 

 prostomium. Ma.xillary plates unlike on the two sides. 



Subfamily Lumbrinereinw. 

 Ventral cirrus ab.sent. Dorsal cirrus rudimentary or foliaceous. No appendages or gills but with anal 

 cirri. Maxillary plates alike on the two sides. 



Subfamily Slauronereince. 

 With dorsal and ventral parapodial cirri but without nuchal cirri and gills. Palps long and not fused with 

 the prostomium. One pair of tentacles. Jaw of one to three rows of toothed plates on either side 

 united at their bases their ends diverging to form a V. 



The following key applies only to the genera described in this paper. 



Subfamily Leodicinw. 



A. With gills. 



o. With five tentacles. 



1. With tentacular cirri Leodice. 



2. Without tentacular cirri Marphtjsa. 



b. With seven tentacles. (Or five tentacles and two frontal palps), and tentacular cirri Onuphis. 



B. Without gills. 



a. With five tentacles. 



1. Tentacular cirri present Nicidion. 



2. No tentacular cirri Paramarphysa. 



b. With three tentacles. No tentacular cirri Lysidice. 



c. With one tentacle Nematonereis. 



