139 



CALANUS MUNDUS, Dana. 



Calamus munaus, Dana, U. S. Expl. Expd. Crust., ii, 1071, pi. 74, f. 2. 



Locality : North Pacific Ocean. Latitude 21° north ; longitude 153° 

 west. Collected May 21, 1873. 



The specimens of C. mundus were taken at the same time with the G. 

 sanguineus. A similar statement is made by Dana. The differences 

 pointed out by that writer were observable in the present specimens, yet 

 they probably have a closer relationship than he gives to them. 



EUCALANUS ELONGATUS, Streets. 

 Calunus tlongattis, Dana, U. S. Expl. Exped. Crust., ii, 1079, pi. 75, f. 1. 



Locality : Korth Pacific Ocean. Latitude 1° north ; longitude 122° 

 west. Collected May 7, 1873. 



The general shape of E. elongatus and U. attenuatus is so very differ- 

 ent from the- form of the typical Calanus, that I think we are justified in 

 considering them under a distinct generic title. I adopt that which 

 Dana suggested for attenuatus, in consequence of ." the multiarticulate 

 character of the smaller branch of the posterior antennse." This char- 

 acter, I am disposed to believe, belongs to elongatus as well as to atten- 

 uatus j at least, a specimen examined by me shows unmistakable evi- 

 dence of it. 



PONTELLIN.E. 



CANDACE ETHIOPICA, Dana. 



Candaoe ethiopica, Dana, U. S. Expl. Exped. Crust., ii, 1115, pi. 78, f. 5. 



Locality : North Pacific Ocean. Latitude 21° north ; longitude 153° 

 west. Collected May 21, 1873. 



Our specimens differ from Dana's etliiopica in some respects, but they 

 evidently do not constitute a new species. The cephalothorax is five- 

 jointed, instead of four, the second joint being short; the right posterior 

 angle of the last joint has a minute projection on its outer side near the 

 apex. This projection was not observed on the left side, and it was 

 only present in the single male specimen. The sixteenth joint of the 

 anterior antennae, or that one following the geniculation, presents both 

 extremities closely pectinated, while there is a short space in the middle 

 that is bare; the proximal extremity of the following joint shows a few 

 short pectinations. The abdomen is five- or six-jointed, and on the right 

 side of the first segment is an acute spinous process, black at the tip. 



