sojtie Entomosiraca. 33 



first three pairs of natatory legs, which in Dana's figure have four 

 segments. He has not, however, described them, and the figure 

 may be erroneous on this point. Length of ceph. '06 ; of abdo- 

 men, -03 ; of abdominal stylets, '04 ; total length, 'ISO. The 

 depth of the frontal excavation is "004. 



In the Atlantic, N. L. 12° 21'; W. L. 25°. 



PL IV. figs. 11 to 14. 



Sapphirina Dance, n. sp. 



Cephalothoracis segmenlum primum breve. Conspicilla con- 



tigua non -prominentia. Digitus antennarum posticarum 



paulo brevior quam carpus, unguiculo elongato. Lamellae 



caudales subovatse, apice interno breviter denticulate, ad 



apicem rotundatse, setis quatuor duabus apicalibus, aliis ex- 



ternis, omnibus dimidio lamellae, non brevioribus. 



This species much resembles S. coruscans, but is broader in 



proportion, the conspicilla are not prominent, the first segment 



of the cephalothorax is not so long as broad, and the caudal 



lamellae have no hair at the inner apex. The length is "092, the 



breadth -046. The length of the caudal lamellae is -01, and the 



breadth "0046. The length of the second segment of the posterior 



antennae is •Oil, of the finger '0099, and of the claw '004. The 



basal part of the anterior antennae has no distinct articulations, 



and the second apparent segment is longer than the two following. 



Colour a brilliant metallic blue. 



Collected in the Atlantic, 27° 30', N. L. ; W. L. 20°. 

 PI. XIL figs. 9, 10, 11. 



Sajjpkirina opaca, n. sp. 

 Foeminae. — Conspicilla contigua. Digitus antennarum postica- 

 rum carpo brevior, unguiculo fere dimidii digiti longitudine. 

 Cephalothorax 5-articulatus, ovatus, segmentum primum 

 literae Q formam similis, segmentis duobus posticis latere 

 rotundatis. Abdomen 6-articulatum, segmento primo par- 

 vulo, secundo rotundato, tertio, quarto quintoque lunatis, pos- 

 tico parvulo. Styli caudales magni, longitudine "008, latitu- 

 dine "005 unc, apice interno denticulato. Opaca. 

 This species very closely resembles S. indigotica, from which it 

 differs only in having the anterior segment of the cephalothorax 

 separated, and in the fourth and fifth segments being rounded at 

 the margins. Length '063. 

 Atlantic Ocean. 

 PI. V. figs, 9, 10, 11. 



VOL. IV. N. S. PART 11. — OCTOBER, 1856, D 



