140 PSEUDOCERATITES OF THE CRETACEOUS. 
same locality has been investigated, it can not be stated whether Sayn’s or 
Nicklés’s species are really the same as Hermite’s. In these smooth forms 
the shells can not be relied on to show specific differences. 
SUBPULCHELLIA CASTELLANENSIS n. sp. Hyatt. 
Pl. XVII, figs. 1-5. 
The two specimens in the Museum of Comparative Zoology here 
described as the types of the genus and species are both smooth, compressed, 
highly involute shells similar to sawvageawi and others in aspect, but with 
denticulations on the auxiliary saddles not found in those species. The 
largest specimen is a cast 28 mm. in whole diameter, probably when 
complete about 40 mm. The inner edge of the living chamber shows on 
one side and this was about one-half of a volution in length. The suture 
figured was taken from the oldest stage of this specimen. The venter in 
this cast is plano-convex, and there are ridges on the ventro-lateral angles, 
but these are ridges because the lateral zones are faintly concave, 
consequently they are ridge-like toward the lateral aspects and not on the 
venter. The center of the venter has a raised line or pseudo-keel such as 
is figured by Sayn in his Pul. sawvageaw, and is not uncommon in species 
of Placenticeras. When the shell is present, the venter is slightly concave 
and it has the usual ventro-lateral ridges. The specimen figured (Pl. XVII, 
figs. 1-4) is somewhat younger, but shows a partially completed living 
chamber a little longer than one-half of a volution. 
Locality: Castellanes, France. 
Age: Neocomian. 
PULCHELLIA Uhlig. 
Uhlig designated three groups when he described this genus, the 
so-called bicarinated or true Pulchellia, the group with coste crossing 
the venter, equal to my Nicklesia, and those with a keel on the venter, 
the equivalents of the genus Psilotissotia. Nicklés recapitulates these facts 
and the observations of Douvillé, and joins him in referring the first group to 
Pulchellia, and also in thinking it possible that P. pulchella and some others 
may be referred to Stoliczkaia. Nicklés, however, retains these forms under 
the general name Pulchellia, and places the other generic names in brackets. 
