69 



Occurrence.- I first found this peculiar Calanoid, many years ago, in the 

 Christiania Fjord at Drobak, where some few specimens were taken up in the 

 dredge from a depth of about 100 fathoms. Subsequently I have also met with 

 it occasionally off the west coast of Norway, and as far north as in the Trond- 

 hjem Fjord, where a solitary specimen was procured from a depth of about 

 150 fathoms. 



Fam. 12. Pseudocyclopiidae. 



Characters. Form of body unusually compact, recalling that in some of 

 the Cydopoida. Cephalosome confluent with the 1st pedigerous segment; front 

 produced below to a distinct rostrum. Last 2 segments of metasome united. 

 Urosome in female distinctly 4-articulate, in male 5-articulate. Eye wholly absent. 

 Anterior antennae of exactly the same appearance in the two sexes, and remarkable 

 for their shortness and restricted number of articulations. Posterior antennae with 

 the basal part imperfectly defined from the inner ramus, which is much longer 

 than the outer. Oral parts on the whole normal, except the mandibles, the cutting 

 edge of which does not exhibit the regular dentition found in other Calanoids. 

 Natatory legs having the same number of joints in the rami as in the 3 preceding 

 families, being, however, distinguished by their unusually short and compact form, 

 somewhat recalling that in the Cydopoida. Last pair of legs present in both 

 sexes, in female comparatively simple, in male rather complicated and very 

 asymmetrical. 



Remarks. This new family is established to include the genus Pseudo- 

 cydopia of Scott, which, though eviden'ly belonging to the present section, cannot 

 properly be placed in any of the 3 preceding families. It is more especially the 

 unusual appearance of the 2 pairs of antenna, which distinguishes this genus, and 

 tends to remove it from the general Calanoid type. We are at present only 

 acquainted with this solitary genus; but it is very probable, that on a future, 

 closer examination of the small Calanoids living at the bottom of the sea, some 

 other nearly-related genera will be found to exist. 



