284 S. I. Smith — Amphipodus genera, etc. 



Lepidactylis arenarius. 



Oniscus arenatius Slabber, op. cit., 1778 (corrected to arenarius in errata). 

 Lepidactylis dytiscus Say, loc. cit., p. 380, 1818. 



Bate, Catalogue Ampbip. Crust. British Museum, p. 112, 1862 (^Say*). 

 Smith, luverteb. Animals Vineyard Sound, Report U. S. Comni. Fish and Fisher, 

 ies, part i, p. o56 (262), 1874. 

 Pterygocera a7-enaria Latreille, Bncyclopedie methodiquo, 1825 (based on Slabber's 

 .species; teste Bovallius). 

 Bovallius, Notes on Pterygocera arenaria Slabber (Bihang till Svenska Vetenskaps- 

 Akad. Handlingar, iv, no. 8), pp. 1-27, pis. 1-4, 1878. 

 Bellia arenaria Bate, Ann. Mag. Nat. Hist., II, vii, p. 318, jil. 9, tigs. 1-8, 1851 (gen. 



et sp. nov.) 

 Sulcator arenarius Bate, Ann. Mag. Nat. Hist., II, xiii, p. 504, 1854. 

 Sulcator arenatius Boeck, Christiania Videnskabs-Selskabs Forhaadlinger, 1870, p. 

 137 (57). 



Coast of Georgia ('Say). New Haven !, Connecticut, sandy shores, 

 at low water, not rare, and also dredged in shallow water (A. E. 

 Verrill, S. I. Smith, et al.) Vineyard Sound !, 5 to 10 fathoms, sandy 

 and shelly bottoms, ISTl, 1875, Smith's Point !, Beverly, Massachu- 

 setts, sand, at low water, August 25, ISVb (J. II. Einerton), These 

 specimens collected by Mr. Emerton are the only ones I have seen 

 from north of Cape Cod. On the European coast, it is reported from 

 the British Isles ! (Norman, Bate), the coast of Holland (Slabber), 

 and Scandinavia (Boeck, Bovallius). 



KXPLANATION OF PLATE lla. 

 Cerapus tubularis. 



All tlie figures are enlarged seventy diameters, except 4, ?>, which is enlarged one 

 hundred and forty diameters. 



Figure 1. — First gnathopod and epimeron of the right side of an adult male. 

 Figure 2. — Second gnathopod and epimeron of the right side of the same specln en. 

 Figure 3. — First perseopod and epimeron of the right side of the same specimen. 

 Figure 4. — «, Third peraeopod and epimeron of the right side of the same specimen ; 



b, distal portion of the same still more enlarged. 



Figure 5. — Pleopods of the right side of an adult female : «, first ; b, second ; 



c, third. 



Figure 6. — Extremity of the pleon of the same specimen, dorsal view, showing uro- 

 pods and telson. 



New Haven, July 1, 1880, 



