390 PROCEEDINGS OF THE ACADEMY OF [1879. 



Genus MITHRAX Leach. 



Mithrax spinosissimus Edw. 



Maia spinosissima Lamarck, An. sans Vert., v. p. 241. 

 Mithrax spinosissimus Edw., Mag. de Zool., ii. pis. ii. and in.; Hist. 

 Crust., i. p. 321. 



Two young specimens from Key West. Other localities are Mar- 

 tinique, Antilles (M. Edw.), Key West (Gibbes), Florida Keys 

 (Stm.), Cuba (Martens), Santa Cruz! (Charles Lawrence), Gua- 

 deloupe (Desbonne). 



Mithrax hispidus Edw. 



Cancer hispidus Herbst, op. cit, pi. xviii. f. 100. 



Maia spinicincta Lamarck, op. cit., v. p. 241. 



Mithrax spinicincta Desmarest, op. cit., p. 150, pi. xxiii. f. 1, 2. 



Mithrax hispidus Edw., Mag. de Zool., ii.; Hist. Crust, i. p. 322. A. 



M. Edw., Crust. Mex. et Am. Cent., p. 93, pi. xxi. f. 1. 

 Mithrax sp. Desbonne and Schr., op. cit. , p. 8, pi. ii. f. 4 and 5. 



Prof. Webster collected a single specimen of this well-known 

 species at Key West. It has been reported from S. Carolina 

 (Gibbes), Key Biscayne (Stm.), Kej r West! (Packard), Tortugas! 

 (Lieut. Jacques), Antilles (Edw.), Cuba (Martens), Guadeloupe 

 (A. M. Edw., Desbonne, Saussure), Martinique (A. M. Edw.), 

 Abrolhos, Brazil (Smith). 



Mithrax pleuracanthus Stm. 



Mithrax pleuracanthus Stm., B. M. C. Z., ii. p. 116. A. M. Edw., 

 Crust. Mex. et Am. Cent., p. 93, pi. xx. f. 3. 



Specimens were collected at Sarasota Bay. Stimpson's types 

 were from Key West and St. Thomas; Alphonse Milne Edwards 

 had specimens from Martinique and Guadeloupe. 



Family PARTHENOPIDiE. 



Sub-Family Parthenopinae. 



Genus PLATYLAMBRUS Stm. 

 Platylambrus serratus A. M. Edw. 



Lambrus serratus Edw., Hist. Crust., i. p. 357 (teste A. M. Edw.). 

 Lambrus crenulatus Saussure, 1. c, p. 13, pi. i. f. 4. 

 Platylambrus crenulatus Stm., B. M. C. Z., ii. p. 129. 

 Platylambrus serratus A. M. Edw., op. cit., p. 15G, pi. xxx. f. 1. 



A female was collected at Charlotte Harbor. (?) Indian Ocean 

 (Edw.), Antilles (Saussure), Loggerhead Key and Tortugas (Stm.), 



