Proceedings of 

 the United States 

 National Museum 



SMITHSONIAN INSTITUTION • WASHINGTON, D.C. 



Volume 123 1967 Number 3623 



Caritus, a New Genus of Caligoid Copepod, 

 With a Key to the Genera of Caliginae 



By Roger F. Cressey 

 Associate Curator, Division of Crustacea 



A small collection of copepods parasitic on Chanos chanos (Forskal), 

 the milk fish, from Nosy Be, Malagasy Republic, has brought to light 

 a new genus of caligoid copepod described herein. The copepods were 

 collected during the author's participation in the International Indian 

 Ocean Expedition and he acknowledges the National Science Founda- 

 tion-U.S. Program in Biology for supporting the field portion of this 

 work. All material has been deposited in alcohol in the U.S. National 

 Museum. All drawings were made with the aid of a camera lucida. 



Caligidae: Caliginae 

 Caritus, new genus 



First 3 thoracic segments fused with head. Fourth thoracic segment 

 free. Lunules present. Dorsal plates absent. Postantennal process 

 (maxillary hook) and sternal furca absent. First antenna 2-segmented. 

 Second antenna with well-developed claw. Maxilliped with strong claw. 

 Legs 1-3 biramose. Leg 1 exopod 2-segmented, endopod rudimentary, 

 1-segmented. Leg 2 with both rami 3-segmented. Leg 3 exopod 3- 

 segmented, endopod 2-segmented. Leg 4 uniramose, exopod 3-seg- 

 mented. Leg 5 present. Leg 6 present in male only. Genital segment 



l 



