SYSTEMATIC INDEX 



10. latifrons. 



11. tridens. 



4. Elasmonotus. 



1 . squamosus. 



2. abdominalis. 



3. armatus. 



4. longimanus. 



5. Galacantha. 



I. spinosa. 



6. Ptychogaster. 



I. spinifer. 



7. Uroptycluis. 



1. nitidus. 



2. uncifer. 



3. rugosus. 



Suborder Macroura. 

 Division I. Trichobranchiata. 

 Group Aberrantia. 

 Family Callianassidas. "7 ^ "i 



1. Callianassa. 



1, occiden talis. 



2. major. 



2. Cheramus. 



I. occidentalis. 



Family ThaumastochelidK. 

 I. Thaumastocheles. 

 I. zaleuca. 



Group Normalia. 

 Tribe I. Synaxidea. 

 Family Scyllaridae. -^ -"• 



1. Ibaccus. 



I. parrce. 



2. Scyllarus. 



1. squamosus. 



2. requinoxialis. 



3. Arctus. 



I. americanus. 



Family Palinurids. 



1. Palinurus. 



I . longimanus. 



2. Panulirus. 



1. guttatus. 



2. americanus. 



3. argus. 



Tribe II. Astacidea. Vj 

 Family Erj'onidre. 



1. Polycheles. 



I. crucifera. 



2. Pentacheles. 



1. agassizii. 



2. spinosus. 



3. validus. 



Family Homaridte. 



1. Phoberus. 



I. caucus. 



2. Nephropsis. 



I. rosea. 



Family Astacidne. 



1. Cambarus. 



2. Parastacus. 



Tribe III. Stenopidea. 

 Family Stenopidoe. 

 I. Stenopus. 



I. hispidus. 



Division II. Dendrobranchiata. '^'V^ 

 Group Normalia. 

 Family PenreidK. 



1. Penffius. 



I. brasiliensis. 



2. Sicyonia. 



I . carinata. 



3. Benthesicymus. 



I. pleocanthus. 



Division III. Phyllobranchiata. 

 Tribe I. Polycarpidea. 

 Family Nikidce. 

 I. Glyphocrangon. 



1. spinicauda. 



2. nobilis. 



3. aculeata. 



Family Alpheidse. "/ ° " 

 I. Alpheus. 



1. armillatus. 



2. bermudensis. 



Family Hippolytids. 



1. Latreutes. 



I. ensiferus. 



2. Hippolyle. 



I. bidenlatus. 



Family Pandalidae. 



1. Heterocarpus. 



1. ensifer. 



2. oryx. 



2. Pandalus. 



I. longipes. 



Tribe II. Monocarpidea. 

 Family Atyidre. 

 I. Atya. 



I. scabra. 



