FIG. 
Euren 
FIG. 
Je. 
FIG. 
Fe. 
Bree 
EXPLANATION OF PLATE VI: 
Mitella mitella (Linn.). 
1.—Specimen from the Gulf of Siam. x 2. 
Lithotrya-nicobarica, Reinhart. | 
2.—Co-type from the Nicobars. 5 A aang 
Scalpellum (Smilium) bengalense, Annandale. 
3.—Mature specimen from the Bay of Bengal in lateral view (magnified). 
Scalpellum (Smilium) acutum, Hoek. 
4.—Specimen on the root-spicules of Hyalonema from the Andaman Sea in 
lateral view (magnified). 4a. Dorsal view of the same specimen. 
Scalpellum longius, Annandale. | 
5.— One of the type-specimens in lateral view (magnified). 5a. Dorsal view 
of the same specimen. = 
Scalpellum lambda, Annandale. 
6.—Type-specimen in lateral view (magnified). 6a. Base of carina and 
carinal latera in dorsal view. 
Scalpellum pacificum, Pilsbry. 
7.—Indian specimen in lateral view (magnified). 7a. Base of carina and 
carinal latera in dorsal view. 
Ibla cumingi, Darwin. 
. 8.—Specimen of the form sibogae, Hoek, from the coast of Burma (magni- 
fied}. 
9.—Old and shrivelled specimen of the typical form from the Persian Gulf 
(magnified). 
