284 



The Scyphacidae are distinguished by the four-segmented 

 flagellum of the antenna, the molar process of the mandible 

 which consists of a low base and a tuft of setae, and by the lack of 

 teeth on the tip of the inner lamina of the maxilliped. Their 

 relationships are, on the whole, with the Oniscidae, and not at 

 all with the Atracheata (Trichoniscidae and Ligydidae). 



The genus Armadilloniscus is sufficiently distinct to be set 

 apart from the rest of the Scyphacidae, retaining the subfamily 

 Armadilloniscinae Verhoeff 1918 and placing the remaining 

 genera in the subfamily Scyphacinae. The first subfamily is 

 distinguished by the tuberculate dorsum and the prominent 

 frontal and antennary lobes. It also has the usual setose spines 

 at the tip of the endopod of the first maxilla replaced by two 

 tufts of fine setae. 



Literature Cited. 

 Blake, C. H. 



1929. Notes on the wood-lice of New England. Bull. Boston Soc. Nat. 

 Hist. 50:9-12, 4 fig. 



BUDDE-LUND, G. 



1885. Crustacea Isopoda terrestria per f anurias et genera et species des- 

 cripta. Havania: p. 1-319. 

 Harger, Oscar. 



1878. Description of new genera and species of Isopoda from New England 



and adjacent regions. Amer. Journ. Sci. (3) 15: 373-379. 

 1880. Report on the marine Isopoda of New England and adjacent waters. 

 Rept. U. S. Comm. Fish. 6: 297-462, 13 pi. 

 Richardson, Harriet. 



1902. The marine and terrestrial isopods of the Bermudas, with descrip- 

 tions of new genera and species. Trans. Conn. Acad. 11: 277-310, 4 pi. 

 1905. A monograph on the isopods of North America. Bull. U. S. Nat. 

 Mus. 54 : liii + 1-727, 740 fig. 

 Verhoeff, K. W. 



1917. Zur Kenntnis der Entwickelung der Trachealsystems und der 

 Untergattungen von Procellio und Tracheoniscus. (Uber Isopoden, 22. 

 Aufsatz.) Sitzungsber. Gesell. Naturf. Freunde Berlin 1917: 195-223, 7 

 fig. 



1918. Zur Kenntnis der Ligidien, Procelhoniden und Onisciden. 24. 

 Isopoden-Aufsatz. Arch. Naturgas. 82A, Heft 10: 108-169, 2 pi., 3 fig.' 



1928. Tiber Stenonisciden. 40. Isopoden-Aufsatz. Zool. Anz. 79: 58-64, 

 2 fig. 



Massachusetts Institute of Technology, 

 ( Cambridge, Mass. 



