THE DE RHAM DONATION. 17 



FAMILY OSTRACIONIDvE. 



220 Lactophrys derhamii? Taken on the shore of Long Island. Not 



described in Dekay's Zoology. 



Characteristics. No orbital spines; back elevated in the form 



of a crescent longitudinally, with two spines centrally situated on 



the periphery of the crescent, and distant one-third of an inch 



from each other; three spines on each side of the abdomen : length 



four inches. 



Should this prove to be an undescribed species, it is proposed to 



name it derhamii, in honor of the late Henry C. De Kham junior. 



SHELLS. 



[Arranged according to the System of Lamarck.] 



CLASS ANNELIDES. 



ORDER SEDENTARIA. 



family serpulacea. 

 221, 222, 223 Serpula vermicularis. 



CLASS CIRRIPEDES. 



ORDER SESSILE CIRRIPEDES. 



221 Tubicinella BALiENARUM. The Tubicinellae are found with nearly the 

 whole shell buried in the thick skin of the whale. 



225 CoRONULA BALiENARlS. 



223 Coronula bal^naris (6 specimens), on a piece of whaleskin. 



CLASS CONCHIFERA. 



ORDER C. DIMYARIA. 

 family conchacea {marine). 



227 Cytherea maculata. 229 Cytherea . 



228 Cytherea dione. 230 Cvtherea . 



family cardiacea. 



231 Cardium . 233 Cardium . 



232 Cardium . 234 Isocardia moltkiana. 



family arcacea. 

 235 Arca . 



