14 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
I II III IV Vv VI 
i anterior 9 6 6 fal 15 15 
right a = a cee as aw 
posterior 5 5 5 12 15 15 
specimen 1 
anterior a 6 5 Wil 14 15 
left . oa i ire = an as 
posterior 5 5 4. 13 14 15 
; anterior % 6 6 12 14. 15 
right me ac — aes — 
posterior 5 5 5 12 14 15 
specimen 2 
anterior 9 cf 5 11 te 15 
left ; He, 7% i es ar foig 
posterior 5 6 4 13 14 15 
In the larger of the two dissected specimens there were about 
45 embryos. In the smaller specimen there were 32 cyprids. The 
latter have been figured by Nilsson-Cantell (1921, text-fig. 8). 
REMARKS.—Based on specimens collected by A. E. Verrill in the 
Hawaiian Islands the present writer described 7. divisa subquadrata 
(Ross, 1961, p. 210). After critical reexamination of the type speci- 
mens the author has concluded that this subspecies does not warrant 
recognition, and should be considered a synonym of the nominate 
species. 
Nilsson-Cantell (1921, p. 364) described 7. divisa from specimens 
collected in Sumatra. Subsequent workers have reported it from 
Formosa (Hiro, 1939, p. 275), the South China Sea (Zevina and 
Tarasov, 1963, p. 97), and Ghana on the west coast of Africa (Stub- 
bings, 1967, p. 293). The presence of this species in the Caribbean 
and the Hawaiian Islands extends greatly its known distribution. 
The fact that it has virtually a circumtropical distribution tends to 
confirm the long history of members of the Tetraclitidae. 
Family BALANIDAE Leach, 1817 
Genus Balanus DaCosta, 1778 
Subgenus Megabalanus Hoek, 1913 
Balanus (Megabalanus) stultus Darwin 
FIGURE 3 
Balanus stultus Darwin, 1854, p. 216, pl. 3, figs. 2a-—2d.— Weltner, 1897, p. 262.— 
Gruvel, 1905, p. 221, fig. 243.—Pilsbry, 1916, p. 235.—Nilsson-Cantell, 
1929, p. 1, figs. 1c, 1d, 2; 1939, p. 5.—Pilsbry, 1953, p. 25, pl. 2 Gigs) J=3).—— 
Henry, 1954, p. 443. 
Tetraclita radiata.—Pilsbry, 1927, p. 38. 
Balanus stultus morycowae Kolosvary, 1966, p. 69, pls. 1, 2. 
