Which of the following does not come under the class mammals?

Options

A. flying fox
B. hedgehog
C. manatee
D. lamprey

Explanation

To determine which of the following does not belong to the class Mammalia, we will analyze each option provided in the question:

1. **Flying Fox**:
- The flying fox is a type of bat, specifically belonging to the family Pteropodidae. Bats are mammals, and flying foxes are classified under the order Chiroptera, which includes all bats. Therefore, flying foxes are mammals.

2. **Hedgehog**:
- Hedgehogs are small, spiny mammals belonging to the family Erinaceidae. They are well-known for their spiny coats and are classified under the order Erinaceomorpha. Thus, hedgehogs are also mammals.

3. **Manatee**:
- Manatees, often referred to as sea cows, are large aquatic mammals that belong to the order Sirenia. They are herbivorous and are known for their gentle nature. Hence, manatees are classified as mammals.

4. **Lamprey**:
- Lampreys are jawless fish belonging to the class Agnatha. They are not mammals and are known for their eel-like appearance and parasitic behavior. Lampreys fall under the category of cyclostomes.

After analyzing all the options, we can conclude that the only option that does not belong to the class Mammalia is:

**Answer: Lamprey**