from the Harbor have been identified* dur- 

 ing the present season. Among the more 

 abundant genera are Chiton, Fulgur, Sy- 

 cotypus, Tritia, Ilyanassa, Urosalpinx, Eu- 

 pleura, Neverita, Littorina, Teredo, Xylotrya, 

 Mya, Solen, Mactra, Venus, Liocardium, 

 Nucula, Scapharca, Mytilus, Modiola, Pecten, 

 Anoniia, and the semi-domesticated oyster. 

 Slugs of various species are common in the 

 woods. Few of the various nudibranchs 

 have been identified. Squids' eggs are oc- 

 casionall}' dredged and adult squids occur, 

 although they are irregular in their appear- 

 ance. 



Bryozoa : Among the common marine 

 forms may be mentioned Crisea ehcrnea, 

 BowerbanJcia, Alcyonidium hispidium and Bu- 

 gida turrita. In the lakes Pectinatella mag- 

 nifica Leidy is abundant. PedlGillina has 

 been found. 



Tanicata : BotryUus is common. Molgida, 

 probably of two species, is obtained abun- 

 dantly. Perophora viridis is found on algse 

 from near the Sound. Common also isAm- 

 aroecium constellatum, found at the Harbor's 

 mouth. 



Platyhelminthes : Fresh-water Turhellaria 

 are abundant. Bdelloura propinqua is com- 

 mon on Limulus. Apohlema (Distomum) ap- 

 pendicxdatum, which occurs abundantly in 

 Copepods here, has been made the subject of 

 a memoir by Professor Henry S. Pratt, of 

 Haverford College. The large Nemerteans, 

 Cerehratidiis Leidyi and C. ladeiis, occur in 

 the sand spit. Of Annelids over fifteen spe- 

 cies have been identified, chiefly by Dr. J. 

 I. Hamaker. Nereis virens, although near 

 the southern limit of its area of distribu- 

 tion, is extremely abundant. The more 



* Chiefly by Mr. Francis N. Balch. 



