56 Insects. 



moving a tumbler-full from the bucket and taking it to the light, a 

 number of Cyclopes were accordingly found swimming and darting 

 about in it. 



" May 30. Lat. 3° 35' S. long. 27° 18' W. At times to-night the 

 brilliancy of the water was sufficient to illuminate the whole stern 

 of the ship and driver, and almost intense enough to throw a shadow. 

 Occasionally a streak of luminous water was observed, running a 

 long way out to windward ; and then a whole host of bright balls 

 were seen in the space cut by the ship, wheeling and careering along, 

 and being mixed up with innumerable smaller spots, gave out such a 

 bright light that it almost dazzled the eye to look steadily upon it." 

 — Private Journal, H.C.S. Berwickshire. 



The bright large balls or globes described above were no doubt Me- 

 dusae, and the smaller spots Entomostraca. These latter were very 

 abundant, but, from their minute size they were difficult to be ob- 

 served ; and being very delicate and short-lived, were generally found 

 dead and partially decomposed in the morning, if the water in which 

 they were taken had been kept all night. The most common belong 

 to the family Cyclopidae, several new species of which T succeeded in 

 placing in the microscope, a description of these I here append.* 



Genus. — Cyclopsina, Edwards. 



Cyclopsina Arietis. Calahus Arietis, Templeton, Trans. Ent. Soc. 

 i. 195, t. 21, fig. 9. Of an ovate form. First pair of antennae long, 

 many-jointed, and furnished with numerous setae ; the two last joints 

 having each a long and strong bristle rising from the under surface, 

 directed downwards and finely ciliated or plumose ; the last joint has 

 in addition to its long setae, two short ones springing from its upper 

 surface, directed upwards and not plumose : second pair of antennae 

 short, stout, divided into two branches of one joint each, terminated 

 by rather long setae. The body consists of five articulations, the last 

 having a lobe on each side projecting beyond the articulation. Tail 

 much shorter than the body, the last joint being bifurcated, each di- 

 vision giving out four or five moderately long filaments, which are 

 beautifully and finely plumose. The abdominal legs are four pairs, 

 beset closely with short spines on each side, and furnished with nu- 

 merous long hairs or setae. 



This species is described by Mr. Templeton in the * Transactions 

 of the Entomological Society.' He takes notice of the cihated or plu- 



* These insects belong to the order Copepodes of Edwards : Lophyropa, LatreiUe: 

 and to the family Cyclopidae : Monocles of Edwards .- Carcinoidae of Latreillc. 



