2 (1) Posterior armature of telson submar- 

 ginal, not completely visible in dor- 

 sal view. (Fig. 4, 5) N annosquiUa grayi 



Figure 4. — N annosquiUa grayi. Telson in 

 ventral view. 



Figure 5. — N annosquiUa grayi. Sixth ab- 

 dominal somite and telson in dorsal view. 



{1} Marginal armature of telson entirely visible in dorsal view 3 



3 (2) 



3 {2) 



Telson with four pairs of fixed 

 marginal projections (Fig. 6). 

 Posterior margin of abdominal 

 somites and dorsal surface of tel- 

 son smooth Phity.squiUa enodis 



Figure 6. — PlatysquilUi enodis. Sixth ab 

 dominal somite and telson in dorsal view. 



Telson with two pairs of fixed 

 marginal projections (Fig. 7). 

 Posterior margin of fourth, fifth, 

 and sixth abdominal somites and 

 dorsal surface of telson with 

 spinules Hetewsqiiilla armata 



Figure 7. — HeterosqiiiUa armaUi. Sixth 

 abdominal somite and telson m dorsal 

 view. 



