292 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 
transverse section, a little higher than wide, indented to fully one-half 
of its height by the preceding whorl; periphery broadly rounded, 
somewhat flattened, fairly well-defined by a row of tubercles on each 
side; sides gently convex, their central portion being the most 
prominent; inner area narrow, fairly well-defined, convex, nearly 
perpendicular to the plane of symmetry of the shell. Body-chamber 
occupying at least five-sixths of the outer whorl; aperture not seen. 
Chambers shallow; septal suture! as in the accompanying figure. 
Septal suture of Juvavites robustus (Blid.). The details of the external saddle are 
not well preserved. 
Test with narrow, prominent, rounded ribs, some of which bifurcate 
near the umbilical margin, the branches again bifureating at about the 
centre of the lateral area, and some yet again at the margin of the 
periphery, the latter point of bifurcation being marked on the greater 
part of the body-chamber by an elongated node, there being 8 or 9 
nodes on the last half of the outer whorl; the ribs do not pass on to 
the inner area of the whorl, and they are all—except possibly those 
on the anterior part of the body-chamber—interrupted for a short 
distance at the centre of the periphery. There are no nodes on the 
earliest part of the body-chamber. 
The present species is represented in the Strachey Collection by 
a fairly well-preserved example, the original of Blanford’s, pl. xvi, 
figs. la, c, which we regard as the type-specimen. The specimen 
appears to be complete, five-sixths of the outer whorl being occupied 
by the body-chamber. Blanford (op. cit., p. 85) gave the dimensions 
of three examples which he designated a, 6, and ¢; this is possibly the 
example marked ¢, but if so, the thickness of the whorls is much 
ereater than that author gives. The elongated nodes at the margin 
of the periphery of the last half of the outer whorl are not well'shown 
in Blanford’s figure. Its dimensions are :— 
Diameter of shell ... He pe cer 67 
Width of umbilicus nen ne as iso 
Height of outer whorl sa see alte 34 
Thickness of outer whorl ... ae -* 32°5 
Type.—B.M. Coll., No. C. 5,050. 
Horizon and Locality.—The example of this species is from Niti, 
and probably from the same horizon as that which has yielded the 
specimens here referred to Juvavites (Griesbachites) Stracheyi and 
Juvavites (Anatomites) expansus respectively, i.e. from the Daonella- 
beds of the Upper Trias. 
The present species comes very near Juvavites ( Griesbachites) Strachey?, 
but differs from that species in havin its greatest thickness at the 
1 The line of insertion of the septum ‘into the wall of the shell ; most frequently 
termed the suture-line. 
