

CYCLOPOIDEA. 1Q71 



Fig. 12 a, Plate 73, represents a specimen which may belong to the 

 above species. I suspect that the setae of the antennas as well as caudal 

 stylets were mutilated. The front (12 b) is a little flattened (instead 

 of rounded) ; the posterior angles of the cephalothorax are subacute ; 

 antennae longer than the body by two or three joints, and tips a little 

 behind line of beak ; four segments of abdomen subequal ; posterior 

 penult seta of antennae (12 c) equals last six joints, and is two-thirds of 

 antepenult in length. Collected, March 22, 1841, north of Depey- 

 ster's Island, Kingsmill Group, Pacific. 



Var. perspicax. — Plate 74, figs. 1 a, b, c, illustrate another specimen, 

 possibly a variety of the sanguineus. The following are its characters : 



Cephalothorax rounded in front, obtuse behind, five-jointed, four 

 posterior segments subequal. Abdomen about half as long as cephalo- 

 thorax. Pigment of eyes transversely oblong, somewhat bilobate. 

 Anterior antennae a little longer than body, curved at base, but thence 

 straight and both in same line, tips not behind line of beak; first joint 

 short, second oblong, last three subequal, last acuminate ; setae short, 

 a longer one from fifth joint, two posterior subapical very long (as 

 long as last five or six joints), subequal, anterior penult a fourth 

 shorter, apical short. Abdomen consisting of four subequal joints, 

 none oblong. Caudal stylets short, slightly longer than broad, setae 

 much spreading, inner nearly half shorter than second. 



Collected among the Feejee Islands, July, 1840. 



Length, one-twelfth of an inch. 



In habit, this species resembles some Pontellae, and it may belong 

 to that group. 



Calanus mundus. 



Frons rotundatus. Cephalothorax posticd obtusus, 5-articulatus, articulis 4 

 posticis subaequis. Antennas anticw corpore parce longiores, bene rectae, 

 apicibus f route non posterior ibus, articulo prirrio (2do?) crassd oblongo et 

 setis inflexis instructo; setis perbrevibus, articuli secwndi longiore, apt- 

 calibus brevibus, posticd antepenultimd longd, posticd penultimd dimi- 

 dio breviore, anticd penultimd paulo rninore (articulum cequante), 



