144 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



Cornea set more or less transversely on eyestalk. Lateral 

 spine of 5th thoracic somite stout, curved forward; pos- 

 terior lobe of lateral margin of 6th and 7th somites 

 acute, sharp pointed, or subacute, directed laterally. 

 Epipodites present on first 4 thoracic limbs. Denticles 

 2-4, 5-7, 1 aculeata, p, 158 



F^. Median carina of carapace before level of cervical 

 groove not bifurcate anteriorly; if bifurcate poste- 

 riorly, only very inconspicuously or incompletely 

 so. 



Cornea set definitely obliquely upon eyestalk. Epipodites 

 present on first 5 thoracic limbs. 



G^. Lateral spine of 5th thoracic somite directed more 

 laterally than forward, only slightly inclined 

 forward; posterior lobe of lateral margin of 

 6th and 7th somites subacute or acute (may be 

 blunt in small specimens), more or less lateral- 

 ly directed, slight if any posterior inclination in 

 7th somite. 



Intermediate carinae of carapace run to or very close 

 to anterior margin. Denticles 3-5, 7-10, up to 14 in 

 some small specimens, 1. Telson more or less rugose 

 or with some small tuberculation either side of me- 

 dian carina ; in young specimens the telson is only 

 pitted, as in other species .... hancocki, p. 160 



G^. Lateral spine of 5th thoracic somite distinctly 

 curved forward ; posterior lobe of lateral mar- 

 gins of 6th and 7th somites drawn out to a 

 sharp point directed posteriorly. 



Intermediate carinae of carapace fall well short of 

 anterior margin. Denticles 3-5, 7-10, 1. Telson pitted 

 and eroded tiburonensis, p. 165 



E-. Submedian carinae of 5th and 6th or 4th, 5th, and 6th 

 abdominal somites posteriorly spined. 



Epipodites present on first 5 thoracic limbs. 



