43 



m. = mouth. 



7nnp. = mandibular palp. 



mn.t. = mandibular teeth. 



m.p. — niembrana propria. 



jnxj}. = maxilliped. 



n. = nucleus. 



?i' = nucleolus. 



n.c. = ventral nerve cord. 



05. = ostium. 



p. = pericardiuDi. 



p.c. = pericardial cavity. 



per. 1 = first perseopod. 



per. 2 = second perseopod. 



per. 3 = third peraeopod. 



per. Jf ~ fourth peraeopod. 



p)er. 5 = fifth peraeopod. 



peri.n.r. = perioesophageal 



nerve ring. 

 p.g. 3 = third pair of post- 



oesophageal nerve ganglia. 

 pi, 1 = first pleopod. 



pi. 2 = second pleopod. 



pi. 8 = tiiird pleopod. 



.<. = sac-like dilation of mid- 

 gut. 



set. rut. = setigerous plates of 

 cuticle of stomach. 



set. cut/. = setigerous plates of 

 cuticle at origin of hepato- 

 pancreatic tubes. 



5^ = stomach. 



st.s. = sternal sinus. 



t. = tergum. 



tel. = telson. 



tr.br.v. = transverse branchial 

 vessel. 



uro. 1 — first uropod. 



uro. 2 — second uropod. 



uro. 3 = third uropod. 



V. = valve separating heart 

 from posterior aorta. 



Plate I. 



Fig. 1. First antenna, witli four- jointed secondary 

 flagelluni (/?. sec.) or exopodite. 



Fig. 2. Second antenna, with enlarged basal joint 

 bearing the antennary cone (ant. c.) and stout 

 flagelluni bearing plumose setse and calceoli 

 (cede). 



Fig. '3. Ninth and tenth joints of second antenna (en- 

 larged) showing calceoli. 



Fig. 4. Left mandible, showing three-jointed mandi- 

 bular palp (^mn. j).), and saw-like jaws bearing 

 dovible rows of teeth. 



Fig. 5. Left first maxilla, also enlarged single spine. 



