Biology of Conus, I — Kohn 
175 
alive for 13 days after hatching, but they grew 
only to g, length of 250 g and no further de- 
velopment occurred. 
Conus vitulinus Hwass in Bruguiere 
On 7 July 1956, at the reef at Ala Moana, 
Oahu, an adult C. vitulinus (no. 2020, 67 X 
38 mm., sex undet.) was collected on sand under 
a dead coral rock, to the underside of which was 
attached an irregular cluster of 1 1 egg capsules. 
Some of the capsules were attached to others by 
confluence of the basal plates, but all were af- 
fixed to the substratum as well. They measured 
23 X 16-17 mm. and their shape was typical 
of the genus (Fig. 14). 
Eight hr. after collection, one capsule was 
examined and found to contain 1-, 2-, and 4- 
cell stages, which measured 225 g in diameter 
Fig. 12. Developmental stages of Conus quercinus Solander, from the same egg mass as the capsules illus- 
trated in Figure 11. a, Uncleaved egg; b, 2-cell stage; c, 4-cell stage; d, embryo in third cleavage division; 
e, trochophore-like stage; f, early veliger; g, developing veliger, anterior-ventral view; h, developing veliger, 
right lateral view; i, shell of veliger, left lateral view; j, hatched, fully developed veliger. e, Eye; f, foot; h, 
heart; k, kidney; m, mouth; op, operculum; ot, otocyst; ps, pigment spots; sh, shell; vl, velar lobe. Nodules 
present on shells are not indicated in figures. 
