Universiti/ of North Dakota. 35 



181 — Tetraclita porosa. Acorn Shells, on rock. 



Aden, Arabia. 

 18L!-lS(i — Lc})as anatircra, naniaclcs in nlcoliol. 



Iixlian Ocean. 

 187 — Leptis anatilera. Barnacle. S. I. 



Off Martha's Vineyard, Mass. 



ISS — Balanns balanoides. Rock Barnacle or Acorn Shell. 

 S. I. New Haven, Conn., shore. 



ORDER — p:xtomostraca. 



189 — Arteniia gracilis. Brine Shrimp. S. I. 



ORDER ISOPODA. 



190 — Cirolana concharum. S. I. 



New Haven, Conn. 



Wood's Holl, Mass. 



ORDER AMPHIPODA. 



191 — Orchestia agilis. Sand Flea or Beach Flea. S. I. 



Newport, R. L, shore. 



192 — Talorchestia longicornis. Large Sand Flea, S. I. 



New Haven, Conn., shore. 



ORDER — SCIIIZOPODA. 



193 — Mysis mixta. S. I. 



Cape Cod Bay, ]\[ass.; 27 fathoms. 



( ) p. n Kif — y\ K p ( ) s'r( > •s\ at a . 



194 — Limulus polyphenms. King Cral> or Horse-shoe Crab. 



^Massachusetts. 



ORDER DECAPOD A. 



195 — Gelasinius pugnax. I"'iddlcr Crab. S. I. 



Wood's Holl, ^[ass., shore. 



190 — Gelasinius pugilator. Fiddler Crab. S. I. 



Wood's Holl, Mass., shore. 



