180 MR. LUBBOCK ON SOME OCEANIC ENTOMOSTRACA 
DlAPTOMTTS. 
DlAPTOMTJS ABDOMINALIS, Lbk. 
Collected June 7. S. lat. 0° 40' ; W. long. 0° 20'. 
» 
October 7. N. lat. 7° 15' ; W. long. 27° 52'. 
C AND ACE. 
C AND ACE ORNATA, D. 
Collected September 15. N. lat. 47° 41'; W. long. 7° 58. 
Candace pachydactyla, D. 
Collected December 15. S. lat. 0° 40 ; W. long. 0° 20' 
„ September 15. N. lat. 47° 41'; W. long. 7° 58' 
„ October 7. ; N. lat. 7° 15'; W. long. 27° 52' 
Calcmopia brachiata, D. 
PONTELLA. 
Subgenus Calcmopia 
Pontellma turgida, D. 
Subgenus Pontellma 
Collected in S. lat. 0° 40' ; W. long. 0° 20'. 
JJ 
N. lat. 2° 3' ; E. long. 86° 14'. 
Pontellina perspicax, D. 
Pontellma Bairdii, Lbk. 
Collected March 25. S. lat. 0° 30*; W. long. 0° 30'. 
„ April 17- S. lat. 0° 40'; W. long. 0° 6'. 
CYCLOPID^. 
Clttemnestra. 
Cly 
temnestra tenuis, n. s. Cephalothorax subacute rostratus, segmento antico lato, 
postice utrinque dilatato, tribus segmentis sequentibus subito angustioribus, margine 
posteriore arcuatis, et lateribus postice productis et subacutis. Abdomen 6-articula- 
tum, segmentis subaequis, decrescentibus, postico bilabato. Antennae anticae 7-arti- 
culatae ? segmento apicali longo. 
The genus Chjtemnestra is widely extended, being found in tbe Pacific and in the 
Atlantic. At present, however, three species only are known : one was found by Dana 
in the Pacific Ocean and in the China Sea ; and a second collected by Dr. Sutherland in 
the Atlantic, and described by me in the * Transactions of the Entomological Society/ n. s. 
vol. iv. p. 25. 
Of the present species, only a single specimen was observed. It was a female, and 
carried a single mass of eggs. The length was about ^ 5 -th of an inch. The general out- 
line of the body much resembled that of C. seutellata. The anterior antennas are much 
longer than in C. atlantica, and resemble in their general proportions those of C. seutel- 
lata. They have also, as in that species, an appendage on the fourth segment counting 
