474 



EXPLANATION OF THE LETTERING. 



b.pl 



br ....... 



bran .......... 



br.c ........... 



br.ct.. ........ 



b.t.... 



b.t.hm or b.t.m 

 b.th.n ......... 



b.v ............ 



c 1 " 3 ........... 



c ........ ...... 



c.ap ..... ...... 



cap.b .......... 



card.g.or cd.g. . 

 card.m. . ...... 



card.s ......... 



c.c. ... ........ 



c.ca ........... 



c.d.. ......... 



c.cl .......... 



c.cn ........... 



c.co ..... ...... 



cer ............ 



cerbl ____ ...... 



cer.p ____ ...... 



c.f ............ 



c -g ........ 



chila ........... 



ch.g ............ 



ch.H.c ......... 



ch.H.tr ........ 



ch.l ........... . 



chl.b ........... 



chlic ........... 



ch.pl ........... 



ch.t ............ 



cl ............. . 



c.l ............. 



c.ms ........... 



c.n ............. 



c.nar or c.nv. . . 

 cn.c ............ 



cnl ............. 



co .............. 



co.c ............ 



co.f ............ 



co.n ............ 



cort ............ 



cox ............ 



cr. 



Basilar plate. 



Brain; brain chamber; procephalic lobes. 



Branchiae. 



Branchiocephalon. 



Branchial cartilage. 



Branchial temperature organs. 



Branchio thoracic or hypobranchial muscle. 



Branchio thoracic nerve. 



Blood-vessel. 



Lines of canal organs. 



Cancellae; corneal membrane; ccelom. 



Cephalic appendages. 



Capsuligenous bar of the endocranium; chilarial bar. 



Cardiac ganglion. 



Cardiomeres. 



Cardinal sinus. 



Canalis centralis; colar ccelom. 



Conical pulp cavities. 



Cephalic disc. Cephalic duct. 



Procephalic ccelom. 



Collar nerve. 



Cephalic caecum. 



Cerebrum. 



Cerebellum. 



Cerebral peduncles 



Cranial floor. 



. .Corneagen layer; cephalic ganglia; caudal neuromeres. 

 ...... Chilaria. 



Cheliceral ganglion. 



...... Chelicero-hemisphere cells. 



Chelicero-hemisphere tracts. 



Cheliceral lobe. 



Chilarial cartilage bar of endocranium. 



Chelicerae. 



.... Chilarial pleurite. 

 . . . Chitenous tubule. 



Cloaca. 



Cancellous layer. 



Cephalic mesoderm. 



.Procephalic neuromeres; cancellae. 

 -Cephalic navel; dorsal organ; haemostoma. 



Neural canal; neuroccele. 



Canaliculi. 



Commissure. 



. .Cerebral commissure cells; corona ciliata. 

 . . Cerebral commissural fibers. 

 . . Nerve to corona ciliata. 

 . . Cerebral cortex. 



Coxal spurs. 



.... Collar pore. 



. . Branchial cartilage of embryo 



