Sentence:  In the female of Culex the <WSD>tentoria</WSD> arise in front of the border of the occipital foramen and ascend at an angle of twenty-five degrees with the floor of the head. 
Meaning of the word marked with <WSD> tags:  The framework of internal supports (a false endoskeleton) within an arthropod head, formed by ingrowths of the exoskeleton called apophyses.