388 PROCEEDINGS OF THE ACADEMY OF [1879. 



Sub-Family Othoniinee. 



Genus OTHONIA, 1 Bell. 

 Othonia aculeata Stm. 



Upas aculeatus Gibbes, Proc. Am. Assoc, iii. p. 171. 



Othonia aculeata Stm., Ann. Lye, vii. p. 49. A. M. Edw., Crust. 



Mex. et Am. Cent., p. 115, pi. xxiv. f. 4. 

 Othonia Iherminieri Desbonne and Schramm, op. cit., p. 20. A. M. 



Edw., op. cit., p. 116, pi. xxiv. f. 5. 

 Othonia anisodon von Martens, 1. c, xxxviii. p. 83, pi. iv. f. 2. 



Professor Webster collected specimens of this species at Sara- 

 sota Bay and Harbor Key, Fla. I have examined others in the 

 Museum of the Peabody Academy from Florida (C. J. Maynard) 

 and Key West (A. S. Packard). I can see no constant differences 

 to separate the forms described as Iherminieri and anisodon from 

 typical forms. The teeth of the antero-lateral margin are variable, 

 and differ frequently on the two sides of the same specimen. A 

 3 r oung specimen from Sarasota Bay had but four teeth on the 

 anterolateral margin besides the angle of the orbit, but I could 

 find no other differences. In ten specimens the ratio of the length 

 to the breadth ranged from 100 : 81 to 100 : 94, with an average 

 of 100 : 86. Other localities are Key West (Gibbes, Stm.), Tor- 

 tugas (Stm., A. M. Edw.), Cuba (Martens), Guadeloupe (Des- 

 bonne), St. Thomas (A. M. Edw.). 



Sub-Family Mithracinee. 



Genus MITHRACULUS White. 

 Mithraculus coronatus White. 



Cancer coronatus Herbst, pi. xi. f. 63. 



Mithraculus coronatus White (pars), List Brit. Mus. Crust., p. 7. A. 

 M. Edw., Crust. Mex. et Am. Cent., p. 105, pi. xx. f. 1. 



Five specimens were collected at Key West, from which place 

 I have examined others collected by Dr. A. S. Packard, Jr. 



Ratio. 

 100 : 123 

 100 : 138 

 100 : 121 



1 The generic name Othonia was used by Johnston (London's Magazine 

 of Natural History, viii. p. 181, 1835) for a genus of worms, but since he 

 has been followed by no other author, with the exception of Gosse, and as 

 his single species has been assigned to the genus Amphicora, I refrain from 

 proposing a new name for Bell's genus. 



