KONGL. SV. VET. AKADEIVtlKN.S IIANnLlNGAU. HAND. 22. N:0 7. 353 



These seven specics are to be distiiiguislied as shows the following syiioptical tablo: 



A. The lower front conier of the carpus of the fifth pair of perreopoda is pro- 

 duced downward.s beyond the under margin of the joint. 

 al. The carpus of the fifth pair of perasopoda is longer tiian Ijroad. 



aa 1. The carpal process of the fifth pair of peraaopoda is more 

 than twice as long as the tubercle on the under margin of 

 the joint. 



aaa 1. The fifth pair of perreopoda are much longer than the 



fourth 1. I*li. setleiitaria. 



aaa 3. Tiie fifth pair of perasopoda are not longer than the 



fourth... 2. Pil. s|iiiiosa. 



aa 2. The carpal process of the fifth pair of perseopoda is not twice 

 as long as the tubercle on the under margin of the joint. 



aaa 3. The tubercle on the under margin of the carpus of the 



fifth pair of perjeopoda is undivided 3. I'h. solitaria. 



aaa 4. The tubercle on the under margin of the carpus of the 



fifth pair of perteopoda is two-pointed 4. Ph. atlautica. 



a 2. The carpus of the fifth pair of perasopoda is about as broad as long. 



aa 3. The fifth pair of pera3opoda are shorter than the fourth. The 

 inner ramus of the second pair of uropoda is longer than 

 the outer 5. Ph. CoUetti. 



aa 4. The fifth pair of perreopoda are about as long as the fourth. 

 The inner ramiis of the second pair of uropoda is scarcely 

 half as lons; as the outer 6. Ph. 



B. The lower front corner of the carpvis of the fifth pair of peraiopoda does 



not project beyond the under margin of the joint — 7. Ph. teiiella. 



K. Sv. Vet. Ak. Handl. Band. 29. N:o 7. 



45 



