1526 CRUSTACEA. 



III. CORYC.EID.S. 

 1. Corycaeinee. 

 Corycaeus, 

 Antaria, . . 

 Copilia, . . 

 Sapphirina, . 



The properly oceanic genera include all the Calctnidce, excepting 

 Diaptomus and Notodelpliys ; all the Corycceidce; with only the single 

 genus Setella among the Cyclopidse. 



Among the CalanidaB, the genera are mainly tropical, yet each 

 affords some extra-tropical species; and those which are most abun- 

 dant in the colder waters are Calani or closely allied. Setella occurs 

 beyond the tropics; but all the species thus far examined are found 

 in the Torrid zone. Pontella is more of a warm-water genus than 

 Calanus. The Corycasidge are to a large extent tropical. The genus 

 Corycceus is almost exclusively so, while Sappliirma is common in the 

 Temperate zone. The Steropina3 are Frigid species. 



Although the Calanidae are more varied in species within the 

 tropics, they abound more in individuals in the colder seas. Vast 

 areas of "bloody" waters were observed by us off the coast of Chili, 

 south of Valparaiso (latitude 42 south, longitude 78 45' west, and 

 latitude 36 south, longitude 74 west), which were mainly due to a 

 species of this group; and another species was equally abundant in the 

 North Pacific, 32 north, 173 west.* They have been reported as 

 swarming in other seas, constituting the food in part of certain species 

 of whale. Such immense shoals we did not meet with, within the 

 tropics. 



Among the Daphnioidea, the genera Daphnella, Penilia, Cerio- 

 daphnia, and Lynceus were observed by us in the Torrid zone. Of 

 the Cypraids, Cypridina, Conchoecia, and Halocypris are oceanic forms, 

 and mainly of the tropical oceans. 



The Caliyoids spread over both zones. Caligus and Lepeophtheirus 

 reach from the equator to the frigid seas; Nogagus, Pandarus, and 

 Dinematura are represented in both the Torrid and Temperate zones. 



* The species in the former case was the Pontella (subgen. Calanopia) brachiata; and 

 in the latter, Calanus sanyuineus. 



