23 Bla 



Binate. — Consisting of a single pair. (From L. 

 hinus, twofold ; L. hi, double.) 



Bipartite. — Divided into two parts to the base, as 

 a leaf (see Partite). (L. hi, and partite, with 

 proper division.) 



Bipectinate {duplicato-pectinatre). — Doubly pectinate 

 (L. hi, and pecten, a comb.) 



Bipupillate. — When the ocellus has two pupils or 

 spots of colour ; possessing two pupils of 

 different colour. (L. hi, and picpilla, a pupil.) 



Biradiate. — Consisting of two rays. (L. hi, and 

 radius, a ray.) 



Biserrate. — Doubly serrate. (L. hi, and serra, 

 a saw.) 



Bisetous. — Furnished with two setaceous appen- 

 dages. (L. hi, and seta, a bristle.) 



Bivalve. — (Proboscis.) Consisting of two valves 

 or divisions united, so forming a tube. (L. hi, 

 and valva, a valve.) 



Blade. — (Lacinia). The extreme portion of the 

 maxillse. (A.S. hlade, a leaf.) 



Blastoderm. — The germ-skin ; the germinal 

 membrane which lies immediately beneath the 

 memhrana vitelli of the o^iim. (Gr. hlastos, a 

 germ, and derma, skin.) 



Blastodermic cells. — The cells forming the 

 blastoderm. (L, hlastos, derma ; and celki, 

 from celo, to hide.) 



