NO. 3570 PANDARIDAE — CRESSET 67 



This species can be separated from A^^. orientalis by the lack of 

 the dorsal plate on fourth segment. It can be separated from A^. 

 crypturus by the nature of adhesion pads of the cephalon and the 

 nature of the fourth leg of the female. It differs from A^. tigris by 

 the nature of the fourth thoracic segment (wide in A^. tigris, narrow 

 in N. vespa) and also by the nature of the caudal rami. 



Genus Paranesippiis Shiino, 1955 



Paranesippus Shiino, 1955, p. 340. [Type-species: P. incisus.] 



In 1955 Shiino described a new genus and species of parasitic 

 copepod on the basis of a single female specimen taken from the 

 body surface of Acanthidium eglantina (Jordan and Snyder). 



In general, this copepod appears to be a member of group II and, 

 as the name implies, seems to be more closely related to Nesippus 

 than to other members of the family. Since Shiino has provided 

 a good description with illustrations, I shall not repeat his description 

 here. Because I had no material to study, I cannot add any more 

 details to the existing description. 



Adhesion pads are associated with first and second antennae and 

 maxilliped. 



The spine and setal formula of legs 1-4 (based on Shiino, 1955) 

 as follows : 



It is interesting to note that the egg strings remain recm'ved and 

 hidden beneath the genital segment as in some other members of group 

 II {Demoleus latus and Dinemoura discrepans). 

 The male is unknown. 



Comparative External Morphology and Taxonomic 

 Relationships Within the Family Pandaridae 



It seems appropriate to examine the family Pandaridae as a group 

 and discuss the taxonomic features on a comparative basis. During 

 the course of the study, it became apparent that certain features 

 were quite stable, while others showed variations that should be 

 pointed out. In some cases these variat'ons can be explained rea- 

 sonably on the basis of the ecology of the parasite. 



Body form: The body of the adult is composed of a cephalon (head 

 and first thoracic segment fused together), 3 free thoracic segments 

 (nos. 2-4), a genital segment (thoracic segments 5 and 6 fused), and 

 an abdomen (of 1 or 2 segments) that bears 2 caudal rami. In gen- 



