Prse 172 



Praeputium. — The large spherical muscular mass 

 into which the ductus ejaculatorius passes. 



Praescutellum, Praescutum. — The plate nearest the 

 head, in the supper surface of the segment 

 when it is divided into four pieces. (L. 'pre, 

 and scutellum ; and scutum.) 



Praesternum. — The plate nearest the head in the 

 lower surface of the segment when it is divided 

 into four plates. (L. pre, and sternum.) 



Prasinous, Prosinus. — The colour of the leaves of 

 leeks ; light green inclining to yellow ; grass- 

 green. (Gr. prason, a leek.) 



Pre-. — A Latin prefix signifying before, or prior 

 in space, time, or degree. 



Prebasilaire. — ^The term applied to the basilaire 

 when it is sloped, and its anterior raised margin 

 swollen into a thick callosity. (L. pre, and 

 hasilairis.) 



Premorse. — Having the end bitten off in appear- 

 ance, or splintery. (L. pre, and morsum, to 

 bite.) 



Preocular (ant. prwoculare^). (Antennre). — Inserted 

 close to the front of the eyes. (L. pre, and 

 oculus, an eye.) 



Primitive streak or band. — The formation of the 

 embryo in an elongated thickened region of the 

 blastoderm. (L. primus, first, and striga, a 

 furrow, a streak.) 



Pro-.— A Latin prefix signifying before, fore, for- 

 ward, or forth. 



