42 
PACIFIC SCIENCE, Vol. XXI, January 1967 
the possession of a dorsal ridge, slightly shorter 
carapace, and absence of ornamentation on the 
anteromarginal ridge. Both species show deep 
reticulations with secondary intergrowths. 
Genus Hermanites Puri, 1955 
Hermanites sp. 
Figs. 32 a-c 
description: In lateral view: carapace al- 
most quadrate ; dorsal margin straight, with 
weakly bifurcating, crooked marginal ridge ; 
anterior margin heavily rimmed, obliquely 
rounded, ventrally extended; ventral straight, 
subparallel with dorsal margin; posteroventer 
with short spines; ventrolateral alae straight, 
horizontal, projecting posteriorly about 23° 
from shell; ornamentation of well-developed 
reticulations in a pattern concentric around 
large smooth subcentral tubercle; eye tubercle 
very large. In dorsal view: anterior blunt, with 
inner row of small denticles extending around 
entire anterior margin; posterior compressed; 
shell strongly projecting at subcentral tubercle, 
posterior part of ventrolateral ridge, and pos- 
terodorsal tubercle; carapace widest at subcen- 
tral tubercle. 
Adductor muscle scars on side of deep sub- 
central depression; top two scars divided, elon- 
gate, oblique; two lower scars almost fused; 
two antennal scars on anterior side of pit; four 
small antennal scars on bottom of pit with large 
anteriorly opened V-shaped scar behind. Radial 
pore canals abundant, about 45 in anterior, 
many with elongate sinuous midswellings, co- 
inciding with marginal denticles; normal pores 
sparse, not necessarily coinciding with exterior 
reticulations ; anterior duplicature moderately 
wide, without vestibules. 
Fig. 32. Hermanites sp. a-b, Specimen usnm 648792; a, right valve view of entire carapace; b, dorsal 
view showing tri-tuberculate carapace, c, sdnh 1062; internal view of broken right valve; adductor scars in 
white. 
