COLLECTED BY CAPTAIN TOYNBEE. 183 



B. Seta articull anteimarum posticarum secundi setulosa. 



CORYCyEUS PELLUCIDUS, D. 

 Collected in S. lat. 0° 30, W. long. 0° 20'. ; 

 S. lat. 13° 43', W. long. 33° 55'. 



COBYCiEUS LOKGICATJDIS, D. 



Collected in N. lat. 7° 15', W. long. 27' 53'. 



Onc^ea, Philippi. 

 ONCiEA PYRiPOEMis, n. s. Femin^e ceplialothorax 5-articulatus, rotundatus. Maxilli- 

 pedes inediocres, antennis posticis paululo majores. Abdomen 5-arttculatiim, stylis 

 medioerilms. Styli caudales abdomine quadmplo, et setfB caudales duplo breviores. 



This species is very nearly allied to A. ohtiisa, wbich it resembles in shape. The stylets, 

 however, are scarcely one-fourth, and the setae scarcely half as long as the abdomen. I 

 believe, however, that the length of these setee varies a little. At least, in one specimen, 

 which in other respects resembled this species, the caudal setse were about a quarter 

 smaller. 



The cephalothorax is five-jointed, and tapers a little behind. The anterior antennse are 

 four-jointed, the apical segment showing traces of articulations. The seta3 are of mode- 

 rate length. The branches of the natatory legs are three-jointed. The claw of the 

 maxillipeds is scarcely shorter than the preceding joint. The abdomen is five-jointed, 

 the three posterior segments being distinct. The two outer spines of the caudal stylets 

 are ciliated only on the posterior margin. 



This description applies to several specimens with bags of eggs attached to the upper 

 side of the abdomen, as described by Dana. There were also some similar specimens 

 without eggs, which, however, may also have been females. But in one case I found a 

 couple connected together, Avhich I suppose to have been male and female. The female 

 had two bags of eggs, as usual. The smaller one, which I suppose to have been the male, 

 clasped the anterior narrow part of the al^domen of the female with its anterior legs. 

 These organs were larger than those of the female ; and I am inclined, therefore, to think 

 that this may be a sexual character. 



In establishing this genus. Professor Philippi makes no mention of the large eyes ; and 

 Dana therefore assumed that they were absent, and placed the genus among the Cyclo- 

 pidse. Philippi, however, expressly states (' Wiegmann's Arch.' 1843, vi.) that the speci- 

 men was lost before the examination was completed; and in all other respects Dana's 

 genus Antaria so closely agreees with Onccea, that I cannot but regard them as synony- 

 mous, in which case the latter name, by the rule of priority, must be retained. 



Neither Philippi nor Dana, who alone has described any species belonging to this 

 genus, mentions the males ; but the two sexes are probably alike. 



Several of the specimens carried bags of eggs. 



Collected May 1?, 1858. S.lat. 0° 40' ; W. long. 0° 20'. 

 „ „ N. lat. 7° 15' ; W. long. 27° 52'. 



S. lat. 40° 53'; E. long. 45° 22'. 

 PI. XXIX. fig. 24, X 30; fig. 25. abdomen, seen from above, x 30. 



2b2 



