à 
68 Transactions. 
Shells with Sculpture unusual for the Group. 
Glycymeris sp. C. 
In the Otago University Mining School collection there is a double- 
valved specimen, 60 mm. high and 55 mm. long, from an unknown locality. 
It is dorso-ventrally oval, equilateral, and has a closely-lined area. The 
sculpture, consisting of 40 flat obsolete ribs with linear interstices, is 
unusual for this group. The beaks are only moderately raised above the 
dorsal margin, but they are broad and prominent, the whole shell being 
considerably inflated. In the absence of a locality it would be unwise to а 
give the shell a specific name. i 
From a shell-bed about the horizon of the Wairarapa limestone, Pukenui, 5 
south of Martinborough, the author collected the top half of a valve some- 
similar to sp. C, but larger and flatter. 
П. The huttoni Group. 1 
Glycymeris huttoni nom. mut. (Plate 3, fig. 2; Plate 4, fig. 2; Plate 7, 
fig. 2.) 
T ыа. 
= TRI ЛАС: 
1873. Pectunculus globosus' Hutton, Cat. Tert. Moll., p. 28 (not of 
owerby). 
1897. Pectunculus globosus Hutton: Harris, Cat. Tert. Moll. Brit. 
3 
WB. te ; Le 
1914. Hanat globosa (Hutton): Suter, N.Z. Geol. Surv. Pal. q 
ull. No. 2, p. 35, pl. iv, figs. 1а, 1b, le. vs 
“ Globosa” is preoccupied by J. Sowerby in Dixon's Geol. of Sussez, a 
p. 170, t. 3, fig. 20, 1850, so, unfortunately, this well-known name must go. 
utton gives as the localities of his species “ Hicks Bay; Kokohu; 
Wairoa, Nelson; Kanieri; Motunau (L); Broken River (U); Callighan's 
Creek ; Kawau; Oamaru." Unfortunately, the lectotype fixed by Suter 
finding out what variations existed in that locality. Nor are there an 
in the Geological Survey collection or at the Dominion Museum. T 
Harris (1897, р. 343) mentions “as immense double-valved — - 
dn 
| 
of Cucullaea ponderosa, and which is here classed as G. robusta E 
(see below). ; 
(b.) Kokohu (= Kakahu) : Suter separated these shells as G. subglobosa. 
(c.) Wairoa, Nelson: Of a arge number of specimens in the Geological 
Survey collection, all belong to G. cordata. Perhaps Hutton 
s mistook a large specimen of this for his G. globosa. 
(d.) Motunau (L): The exact locality is uncertain, but the few poor 
specimens in the Motunau collections (locs. 218 and 219) are 
here referred to G. manaiaensis. 
(e) Broken River (U) affords good specimens, which are, however, 
10ге o ype. 
' (7) Callighan's (= Callaghan's) Creek: The common shell of this locality 
belongs to the Avinea group, and is here called G. callaghant. 
lateral and regularly-rounded shape in youth, and the absence of : 
an anal sinus, it is considered to belong to a different species. 
