THE DE RHAM DONATION. 17 



FAMILY OSTKACIONID^. 



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



described in Dekay's Zoology-. 



Chahactbeistics. No orbital spines; back eleyated in the form 



oi 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 Eham junior. 



SHELLS. 



[Arranged according to the System of Lamaeok.] 



CLASS ANNELIDES. 



ORDER SEDENTARIA. 



family seepulacea. 

 221, 222, 223 Serptjla vermicularis. 



GLASS CIRRIPEDES. 



ORDER SESSILE CIRRIPEDES. 



224 TraiciNELLA bal=enarum. The Tubicinellse are found with nearly the 



whole shell buried in the thick skin of the whale. 



225 CoKONTJLA BALyENAElS. 



226 CoRONULA BAL.ENARIS (6 Specimens), on a piece of whaleskin. 



CLASS OONCHIFEEA. 



ORDER C. DIMYARIA. 

 FAMILY CONCHACEA {marine). 



227 Cythekea maculata. 229 Cythehea 



228 Cytherea dione. 230 Cytherea 



FAMILY CAUDIACEA. 



231 Cardium . 233 Cardium . 



232 Cardi0M - 234 Isocardia moltkiana. 



FAMILY ARCACEA. 



235 Aeca . 



