PLANAXIDA. 185 
subvar. rugosolirata. 
8 North Australia; ex c. British Museum. 
I cannot accept Pl. undulatus, Lamarck, even as a variety, be- 
cause some individuals in the same “hand-full” are of this, while 
others are of the ordinary coloration. Itis interesting to find 
this species at Bombay, adjoining the habitat of the next form. 
2. Planaxis savignyi. 
Planaxis savignyi, Deshayes, Mag. Zool. 1844, pl. 109, Red Sea and Mada- 
-gascar, long. 22, diam. 8 mil.; fide Issel, Pl. griseum, Brocchi, Cat. 
Conch. G. Forni, 1822, G. of Suez. 
50 Persian Gulf; coll. W. T. Blanford, Esq. 
A trifle smoother and more ventricose than in the typical 
figures ; the spots are often undulately confluent, as in the pre- 
ceding species. Long. 21, diam. 16 mil. 
6 Suez; exc. Asiatic Soc. Bengal. 
Agree exactly with Savigny’s figure. 
20 Massaua and Annesley Bay; coll. Prof. A. Issel, and W. T. Blanford, 
Esq. 
A smaller and shorter-spired form closely resembling the 
Arakan variety in shape. McAndrew records both Pl. griseus 
and Pl. savignyi as distinct species, both as frequent at Suez ! 
var. subnigra. 
12 Hormuz and Muscat, Persian Gulf; coll. W. T. Blanford, Esq. 
20 Aden; coll. G. Nevill, Esq. [mostly young]. 
2 Kathiawar; coll. F. Fedden, Esq. 
var. encaustica. 
Planaxis encausticus, Smith, Ann. Mag. IX, 1872, Arakan, long. 20, diam, 12 
mil, 
10 Arakan [typical] ; coll, W. Theobald, Esq. 
