NO. 4 schmitt: stomatopods 145 



F^. Portion of median carina of carapace before level of 

 cervical groove bifurcate anteriorly and posterior- 



ly. 



Lateral process of Sth thoracic somite a well-developed 

 spine. 



G^. Only 5th and 6th submedian abdominal carinae 

 posteriorly spined. 



Lateral spine of Sth thoracic somite curved forward. 

 Posterolateral angle of posterior lobe of 6th and 7th 

 somites directed obliquely backward, usually sharply 

 spinous, seldom only subacute. Intermediate carinae 

 of carapace fall short of anterior margin. Cornea set 

 more or less transversely on eyestalk. Denticles 5-7, 

 15-19, 1 biformis, p. 165 



G^. Fourth,^^ 5th, and 6th submedian abdominal 

 carinae posteriorly spined. 



Lateral spine of Sth thoracic somite directed more or 

 less laterally, not markedly turned or inclined, for- 

 ward; posterolateral angle of posterior lobe of later- 

 al margins of 6th and 7th somites rounded off or 

 bluntly pointed, subacute in old, well-developed in- 

 dividuals. Intermediate carinae of carapace running 

 to or about to anterior margin. Cornea set very 

 obliquely on eyestalk. Denticles 5-8, 10-13, l(-2?). 

 panamensis, p. 166 



F^. Median carina of carapace before cervical groove not 

 bifurcate at either end ; intermediate carinae very 

 short, fall far short of anterior margin. 



Lateral process or processes of Sth thoracic somite in- 

 conspicuous, low and undeveloped, at most "a very short 

 obtuse spine [if it can even be called that] that is flat- 

 tened antero-posteriorly and is connected by a ridge 

 with the short acute ventral spine of the same side" 

 (Bigelow). Only Sth and 6th submedian abdominal 

 carinae posteriorly spined. Mandibular palp was found 

 present only in the largest specimen and then only on the 

 right side, palp with 3 joints at most only obscurely in- 

 dicated. Cornea set more or less obliquely on eyestalk. 

 Denticles 2-5, 6-9, 1 (usually 4, 7-8, 1). . pai"va,p. 168 



34 In specimens under 40 mm. in length the 4th abdominal submedians may 

 not be spined. 



