Shells

1. Jagged opening

1.1. Curved edges

1.1.1. Smooth texture

1.1.1.1. Non-pointed

1.1.1.1.1. Non-cone

1.1.2. Rough texture

1.1.2.1. Pointed

1.1.2.1.1. Non-cone

2. Smooth opening

2.1. Curved Edges

2.1.1. Smooth texture

2.1.1.1. Pointed

2.1.1.1.1. Non-cone

2.1.2. Rough texture

2.1.2.1. Non-pointed

2.1.2.1.1. Non-cone

2.2. Smooth Edges

2.2.1. Smooth texture

2.2.1.1. Pointed

2.2.1.1.1. Cone

2.2.1.1.2. Non-cone

2.2.2. Rough texture

2.2.2.1. Non-pointed

2.2.2.1.1. Scallop