LERNiEOIDEA. 1377 



LERNiEOIDEA. 



The relation of many of the Lernaeoids to the Corycaei is very 

 striking, and a figure is added on Plate 92 for comparison. It repre- 

 sents the Lernentoma cornuta, from Nordmann's Mikr. Beit. It is a 

 male ; the females of this and allied species are very diverse in forms, 

 and alone would seldom suggest this relation, or but imperfectly so. 

 Ergasilus is the connecting link between such species and the Cory- 

 caeidae, and in both these groups, the oviferous appendages are sacs 

 instead of simple tubes. Other Lernaeoids are rather related to the 

 Caligidse ; and traces of this in the first pair of legs may be observed, 

 as in Lernanthropus. Still, owing to the transitions of form among 

 the groups, it is difficult to base an arrangement of the species on 

 these relations. This department of Crustacea has not been spe- 

 cially studied by the author, and no attempt is therefore made to 

 revise the genera. The following classification of the genera is here 

 presented. Edwards adopts three grand divisions ; the first (Chon- 

 dracanthiens), including species having distinct ancoral appendages 

 or feet to the cephalothorax ; the second (Lerneopodiens), those 

 whose females, at least, have a pair of appendages united at summit, 

 and sometimes from base, terminating in a disk for adhesion; the 

 third (Lerneoceriens), embracing species without ancoral appendages, 

 and only one or two pairs of unjointed processes attached to the ante- 

 rior part of the body. The last are the Penellida of Burmeister, and 

 the first two groups his Lernceoda. 



These groups may be divided into subfamilies, as follows : — 



Fam. I. CHONDRACANTHID^E. 



Appendices cephalothoracis numero quatuor vel plures, unguibus plus 

 minus ve ancorales. 



Subfam. 1. SELINiE. — Antennae anticae et pedes thoracis postici 



graciles. 



G-. Selius, Kr. 



345 





