ialontolngia ndita,

FAUNA OF KACHH (OOTCH). ·
233
Genus EPIMAYAITES, nov.
EPIMAYAITES POLYPHEMUS {W.aagen).
1875. Stephanoceras polyphemus Waagen ; p. 116, pl. XXIX, ig. 2 only (3 in. explanation
of plate).
1894. Macrocephalite.s polyphemus (Waagea) ; Tornq]riat, pp. 14, lB, ,25.
1894. Macrocephalites polyphemus (Waagen) ; Pompeckj, p. 254.
1895. Stephanoceras polyphemus (Waagen) ; Noetling, p. 14, pL XII only.
1910. Macrocephalites polyphemus (Waagen) ; Lemoine, p. 30.
1924. Mayaites polyphemus (Waagen) ; Spath, p. 9.
1924. 'Stephanoceras ' rrolyphemus Waagen ; Buckma.n, p. 46.
Waagen's largest example (figs. la, b) is said to be lost, but Noetling
selected the original of fig. 2 (suture-line only) as type of this species and gave
its side- and peripheral Views. The smallest specimen (Waagen's fig. 3) ,
apparently not seen by N oetling and in any case not referred to, is closer
to M. maya than to the lectotype of the present species, and it may be added
that judging by the rounded earlier whorls of the gigantic example figured
by Waagen (figs. la, b) this also probably represented a fully grown Mayaites
'
of the maya type rather than the restricted E. polyphemus.
The latter has proportions 238-·5Q--·45-· 15 and is thus slightly more
compressed and slightly more involute than Sowerby's species. Its distinguishing
features, however, are the slightly projected, not rursiradiate secondary
costation and the subgaleate whorl-section, characters, in which E. polyphemu
is closer to Epimayaites than to .Mayaites . The suture-line also with its arched
lateral and auxiliary elements and the prominent outer branch of the external
saddle is that of, e.g., Epimayaites of the lemoini type, not of the true Mayaites.
Noetling's large Mazar Drik form (pl. XI) seems to be a typical M.
maya, not the species here discussed, whilst an example in the Blake Collection
is transitional to E. lemoini or E. excentricus. It is still septate at a
diameter of 220mm. and has slightly closer and finer costation, with the primaries
disappearing at about 160mm.
A very large specimen in the Blake Collection, which at a diameter of
365mm. shows' half a whorl of smooth body-chamber, has great resemblance
to the gigantic Stephanoceras polyphemus, figured by Waagen (pl. XXIX, figs.
la, b) with · a similar tumid outer whorl. This probably does not belong to
the present species, however, since there are only three lateral saddles visible
ori the whorl-side, outside the umbilical edge, as in E. q,xonoides or E. evo
lut,us. (pl. XXXVII, fig. 5c). It is possible that all the more inflated forms
of Epimayaites produced . such 'polyphemus '-like adults and ,the gigantic example
in the Blake Collection is therefore now provisiopally attached to E.
axonoides.
Macrocephalites olcoste_phaneides Tornquist (1893, p. 8, pL I, figs. 1-3) which
was considred to be a near relation of E. polyphemus, is . probably ('loEer
to Mayaite.