192 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



2. First maxillae. Same as that described 

 for E. gieshrechti. Vervoort shows 5 setae on 

 the second basal segment, 2 setae on the second 

 inner lobe and 4 setae on the first segment of 

 the endopod. 



E. acutus may be identified by the large ros- 

 tral plate which is visible in dorsal view (fig. 

 1) and the character of the posterior lateral 

 thoracic margins (fig. 2). 



Euaetideus bradyi (A. Scott, 1909) 



(Plate 8, figs. 3-4) 



Pacific records: Vervoort, 1957; Also, as Aetideus 

 bradyi; Tanaka, 1957a. 



Vessel : Station Occurrence 



Hugh M. Smith __ 94 12 females, 1.60-1.65 



mm. 



Do 144 3 females, 1.65 mm. 



Do 63 1 female, 1.70 mm. 



Remarks: The second antennae differ from 

 that figured by Vervoort in the manner de- 

 scribed above for E. gieshrechti. The first 

 maxilla of the present specimens has 4 setae on 

 the basal segment and 3 setae on the second 

 inner lobe. Vervoort showed 5 and 2 setae, re- 

 spectively, on these parts of the maxilla. The 

 anterior margin of the head of this species ap- 

 pears to be pitted similar to that of the preced- 

 ing two species. 



E. bradyi is distinguished from the above two 

 species by the absence of knobs between the 

 rostral spines and the character of the posterior 

 lateral thoracic margins (fig. 4). In lateral 

 view, a short hair is visible just dorsad of the 

 base of the rostrum. I have not observed this 

 hair in the other two species. 



Chiridius poppei Giesbrecht, 1892 



(Plate 8, figs. 5-7) 



Pacific records: Scott, 1909; Farran, 1929; Tanaka, 

 1987; Wilson, 1942; Brodsky, 1950; Tanaka, 1953; 

 1957a. 



Vessel : Station Occurrence 



Hugh M. Smith __ 94 2 females, 1.59, 1.83 



mm. 

 Do 63 1 female, 1.70 mm. 



Remarks: This species was found in two 

 samples collected in the eastern Pacific. Ver- 



voort (1957) suggested that C. poppei and C. 

 gracilis Farran, 1905 may represent different 

 size groups of the same species. He has also 

 indicated how the two forms differ. 



Gaetanus miles Giesbrecht, 1888 



(Plate 8, figs. 8-13) 



Pacific records: Scott, 1909; Farran, 1936; Wilson, 

 1942; Brodsky, 1950; Tanaka, 1953; 1957b. As G. se- 

 cundus Esterly, 1911; Johnson, 1942. 



Vessel : Station Occurrence 



Hugh M. Smith __ 29 2 females, 3.40, 3.50 



mm. 



Do 63 2 females, 3.52 mm.; 



1 male (stage 

 V), 2.89 mm. 



Remarks : The female of this species is easily 

 recognized by the elongate antennae which ex- 

 ceed the furca by the last 9 segments. Accom- 

 panying the females in the collection from 

 Smith 63 was an immature male (stage V) 

 which is apparently referable to this species. 

 The fifth feet are shown in figure 13. The 

 adult male is undescribed, although Esterly 

 (1911) mentions that he has observed this sex, 

 presumably in company with the females of his 

 G. secundus ( = G. miles). 



Gaetanus minor Farran, 1905 



(Plate 8, figs. 14-20) 



Pacific records: Vervoort, 1957. Also, Anraku, 

 1954b; 1954c; Tanaka, 1957b; Heinrich, 1958b. 



Vessel : Station Occurrence 



Hugh M. Smith __ 29 2 females, 2.18 mm. 



Do 63 2 females, 2.15, 2.24 



mm.; 1 male 

 (stage V), 1.87 

 mm. 

 Horizon 32 1 female, 2.00 mm. 



Remarks : The female is distinguished from 

 G. miles by the short antennae and the pres- 

 ence of numerous small spines (fig. 17) on the 

 first basipodal segment of the fourth feet. Rose 

 (1933) states that the endopods of the second 

 feet are composed of 2 segments. These endo- 

 pods of the present specimens, as well as the 

 one figured by Scott (1909), consist of only 1 

 segment (fig. 16). Associated with the females 

 in the collection from Smith 63 was a juvenile 



