413 



separated from each other at the base by the triangular anterior 

 extremity of the sternum, which is greatly prolonged. In the 

 outer maxillipeds the ischium-joint is enlarged and dilated within, 

 while the meros is very small, and slender like the last three 

 joints or palpus ; the exognath is slender and palpigerous. 



The feet are slender and weak, smooth and shaped nearly as 

 in Pinnotheres. The chelipeds are equal, and about as long as 

 the ambulatory feet, and twice as thick. Fingers of the hand 

 nearly straight, longitudinal, and shorter than the palm. Dactyli 

 of the ambulatory feet all very short, and slightly uncinate. 

 Sternum very broad and smooth, with the genital orifices rather 

 wide apart. Abdomen of great size, larger than the rest of the 

 animal, smooth, but with the segments distinct ; the sides much 

 expanded and folded inward, forming a kind of pouch for the 

 reception of the eggs. 



Color a dark blue-gray, or "neutral tint." Length of the 

 carapax, 0.21 ; breadth, 0.165 inch. 



Found clinging to the branches of living madrepores, at the 

 depth of one fathom, in the harbor of Hilo, Hawaii, March, 1856. 

 They probably feed upon the coral-polypes. 



The Corresponding Secretary read the following let- 

 ters, which had been recently received, viz : — 



From the Smithsonian Institution, June 23 ; the Royal So- 

 ciety of London, March 13 ; the Lyceum of Natural History of 

 New York, Februaiy 11, acknowledging the receipt of the So- 

 ciety's publications ; from Charles Loosey, New York, August 

 19 ; the Royal Geographical Society, April 20, presenting vari- 

 ous publications ; from William Sharswood, Philadelphia, accom- 

 panying descriptions of insects; the same, August 26, proposing 

 an exchange of publications with the Entomologischer Vei-ein zu 

 Stettin ; the Societe du Museum d'Histoire Naturelle de Stras- 

 bourg, March 1, 1857, proposing an exchange of publications. 



Joseph Hyrtl, of Vienna, was elected an Honorary 

 Member of the Society. W. G. Binney, of Burlington, 

 N. J., and E. S. Morse, of Portland, Me., were elected 

 Corresponding Members. Dr. Richard H. Wheatland, 

 of Salem, was chosen a Resident Member. 



