89 



segment always transverse in the adult. Color, yellowish-gray ; 

 posterior pair of false feet always black. Length, 1.5 ; breadth, 

 0.9 inch. Very common on fish in the San Francisco market. 



Sphceroma amplicauda. Caudal segment and posterior 

 pair of false feet greatly expanded. Thorax with three longitu- 

 dinal rows of small tubercles, those of the middle row becoming 

 gradually larger posteriorly, the terminal one subspiniform, point- 

 ing backward. Abdominal plate large, forming two fifths the 

 length of the body, triangular, terminating in an acute point. 

 Outer lamellae of posterior false feet very large, dilated, but not 

 extending posteriorly beyond the extremity of the abdomen. 

 Length, 0.25 ; breadth, posteriorly, 0.17 inch. Found at To- 

 males Bay, by Mr. Samuels. 



The President called the attention of the Society to 

 the very valuable collection of books on Natural History, 

 from the library of the late Dr. Amos Binney, deposited 

 with the Society for their use by Mrs. Binney, and now 

 for the first time placed upon the shelves in the Society's 

 rooms, as follows : — 



Since the first organization of our Society, a quarter of a 

 century, with all its varied changes, has been completed ; and it 

 is a melancholy thought, which forces itself upon me, that of 

 those assembled here to-night, or of those who now usually meet 

 with us, there are found so few who aided and supported it in its 

 infancy. Some, yielding to the exacting duties of life, have with- 

 drawn from us wholly, or in part, their active cooperation, though 

 we trust, not their sympathy or good wishes. Others have passed 

 away, to be with us here no more forever ; among these were 

 some of our most active associates, some of our most disinterested 

 friends. We hold in grateful remembrance the names of Green- 

 wood, Gay, Greene, Teschemacher, Harris, Burnet, Warren. 

 Each in his own way contributed to our progress, and is asso- 

 ciated with our history. 



But there was one to whose thoughts our Society and its con- 

 cerns were always a welcome subject, — one who laboriously 

 cooperated with others in its organization, who, more than any 



