220 EUG. DADAY DE DEÉS 
arcuatus, in marginem ventralem parum ventricose rotundatum 
sine limite visibili ineuns (fig. 49, 4). 
Conchae infra vel supra visae late fusiformes, latitudine 
maxima ante medium sila ; apice anteriore posteriore bre- 
FRANS 
1: 
SSS QUES D 
UP 
Fig. 49. — Zocyzicus irritans (Wolf). — a, © concha a latere, 1 : 5; D, © concha a 
latere, À : 5; c, O caput a latere, 1 : 10; d, © conchae supra visae, 1 : 5;e, © con- 
chae supra visae, 1 : 5; f, © telsonum et segmenta aliquot antecedentia. Reich. 
Oc. I, Obj. 0; g, @ caput a latere, 1 : 10; 2, O' pars apicalis pedum primi paris. 
Reich. Oc. 1, Obj.0; ?, © pars apicalis pedum 2-di paris. Reich. Oc. I, Obj. 0; 
k, © pars apicalis pedum tertii paris. Reich. Oc. 1, Obj. 0; 7, © © pars valvulae 
concharum. Reich. Oe. I, Obj. 2; m, Q@ pes primi paris. Reich. Oc. 1, Obj. 0; 
n, © Q aculei telsoni marginales. Reich. Oc. I, Obj. 2; o, © pes 10-mi paris. 
Reich.-Oc-1; Oh]. .0: 
viore, tumidiore ; marginibus lateralibuslate arcuatis (fig. 49, e). 
Valvulae concharum zonis incrementi 10-12, structura colo- 
reque maris similhibus. 
Caput a latere visum utcunque triangulare. angulo oceipi- 
tali fere recto, parum rotundato, haud producto; margine fron- 
‘ali supraoculari recto, declivi, ante oculos compositos tuber- 
culum obsoletum, late rotundatum formante:; margine frontali 
