Se 
“jy. 
Ree 
1923.] The Fossil Pectinide, Bhavanagar State. 85 
is much smaller than the other one and shows faint traces of 
radial plication. The ears of the left valve resemble those of 
the valve. 
species may be compared with Pecten -ciysisoread 
Goldf.. i a there is a good deal of difference ure 
of the radiating ribs. In Chimes pusio Linn? the oe ae 
nature is rather irregular. It may also be compared with 
Chlamys pallium Linn’ which has also been found as ae 
by Martin from Java,’ but the nature of the ribs which a 
tripartite in C. pallium distinguishes it from C. ‘Widdlemissi. 
C. varia, Linn,’ which has also been described by Sacco® 
can be distinguished from the Hathab s species as in the latter 
the scales are of an imbricated nature, while the squame of 
the former are more wartlike. It also resembles P. obliquus, 
J. de C. Sow? but C. Middlemissi is much smaller in size and 
lacks the riblets that are found between the contiguous strong 
ribs. P. Soomrowensis J. de Sow? is also comparable 
— _this, in the possession of squamose ribs, but the ribs in 
f, wensis are tripartite and pentapartite. 

EXPLANATION OF PLATE. 
1B: 
2. 
* ace Amussium hathabiensis, n. sp. 
4. 
5. Chlamys tauroperstriata, Sacco. var. spinosa, n.v... Left 
valve. 
6 Right 
valve 
Ba. .. Bar 
magai- 
fied. 
7 : ie : eft 
valve. 
7a. : ; Surfac 
orna- 
menta- 
tion 
magni- 
fied. 

\ Peres Germ., p. 59 tay 94. fig. 
* Reeve: Mon — oe Be ee, genus Pes. pl. XXXIII, fig. 157 
Be “ag 63. 

24 
6 abate op . pl. XXV, fg, 102. 
i meg tav. I, figs I 
Op ci 
] Pising "Geld. Soc. ee es Ber, Vol. V, p. XXV, &g, 15. 
* Ibid pl. XXV, fig. 1 
