94 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



taken in any abundance, I recollect on one occasion 

 finding hundreds in one night's townetting off Puffin 

 Island in May, 1889. The many jointed anterior antennae 

 serve to distinguish this from the next species. 

 Cyclopina gracilis, Glaus. (PI. XVII, fig. 3.) 

 Length 0.45 mm. Less common than the last species, 

 but occurring occasionally in townettings taken near land. 

 Anterior antennae, eleven jointed. 



Cyclops marinus, n. sp. (PI. XXIX, fig. 1 — 8.) 

 Length 1.20 mm. Body ovate (fig. 1) wdth long ab- 

 domen. Anterior antennae (fig. 2.) 12 jointed, the first 

 joint being the longest, and the eighth almost as long 

 but narrov^er, the third and sixth joints being very short. 

 Posterior antennae (fig. 3) four jointed, the joints being 

 of nearly equal length. Mandibles (fig. 4) have six long 

 sharp teeth at apex. Palp reduced to a small tubercle 

 from which spring four spinous setae. Maxillae (fig. 5) 

 without palp, having two large teeth at apex and a 

 number of lateral small ones. Anterior foot jaw (fig. 6) 

 four jointed, with numerous spinous setae, some of them 

 plumose. Posterior foot jaw (fig. 7) three jointed, the 

 upper one dividing into three branches terminated with 

 spinous setae. 



First four pair of swimming feet (fig. 8) all three jointed, 

 the inner joint of all except the fourth pair having a curved 

 spine at the apex. Fifth feet (fig. 9) two jointed, the 

 second joint being more than double the size of the first 

 and having seven strong setae. Abdomen four jointed, 

 the first joint being nearly as long as the second and third 

 together. Caudal segment about three times as long as 

 broad, each bearing five terminal setae and one short 

 lateral seta. 



Two specimens only, both females were dredged in 20 

 fathoms about 20 miles out from Southport pier, during 

 the "Mavis" expedition. 



