940 



SCIENCE 



[N. S. Vol. XL. No. 1043 



1914. This is, therefore, the first instance of 

 its occurrence in the basin of the Delaware 

 Eiver, as well as the most eastern and northern 

 locality at which the species has been obtained. 

 The species is of further interest in not having 

 been secured in Pennsylvania since its dis- 

 covery in the Conestoga in 1864, by Jacob 

 Stauffer. The type, Stauffer's specimen, has 

 been compared in this connection, and agrees 

 in most all respects. It is, however, over three 

 inches in length, though in various works the 

 species is given as of smaller size. Recently 

 Messrs. Radcliffe and Welsh have described 

 a darter from Swan Creek, Maryland, as new, 

 under the name H. sellaris. My example diiiers 

 in having the spinous dorsal more conspicu- 

 ously lower than the rayed dorsal, one more 

 dorsal spine, naked cheeks and coloration. The 

 additional dorsal spine would appear an inter- 

 mediate character. H. sellaris is shown with 

 the spinous dorsal marked with three dark 

 blotches to each spine, whereas in my example, 

 at present, the dark blotches are only on the 

 membranes. The dark blotches on the back 

 are such as may easily admit of change with 

 age, the Swan Creek specimens being small. 

 Besides the crustaceans Asellus communis and 

 Gammarus fasciatus, other fishes found in 

 Skippack Creek were Notropis procne, N. 

 whipplii analostanusj N. cornutus, Rhinichihys 

 atronasus, Fundulus diaphanus and Boleosoma 

 nigrum, olmstedi. In the brook near Eahn, 

 another Perkiomen tributary, Bemotilus atro- 

 macutatus, Caiostomus commersonnii and 

 Micropterus dolomieu were found, and in 

 Landis Brook near Grater's Ford, besides 

 Fundulus and Rhinichihys, Notropis whipplii 

 analosianus and Lepomis auritus. 



In the Delaware and its tributaries in Bucks 

 County I met with several species of local in- 

 terest. One was the Exoglossum maxillingua 

 in the river at Morrisville, on July 22, with 

 Notropis hudsonius amarus, N. whipplii analo- 

 sianus, Fundulus heteroclitus macrolepidoius, 

 F. diaphanus, Lepomis and Boleosoma, show- 

 ing its association with upper tidal species. 

 In a small tributary above Tardley, Notropis 

 hifrenaius, N. whipplii analosianus, N. cor- 

 nutus, Rhinichihys, Oatostomus and Boleosoma 



were common. In Taylorville, Knowles and 

 Pidcock's Creeks, Bemotilus airomaculatus, 

 Notropis hifrenaius, N. whipplii analosianus, 

 N. cornutus, Rhinichihys, Fundulus diaphanus, 

 Lepomis and Boleosoma were about equally 

 abundant. Pimephales noiaius and Bemotilus 

 hullaris were peculiar to Taylorville Creek, 

 while Hyhognathus nuchalis regius and Fsox 

 americanus were only found in Knowles, and 

 Gatostomus occurred in both. This is the first 

 instance of Pimephales in this section, though 

 I have it from further west, or the Schuylkill. 

 Rhinichihys was the only fish found in Cuta- 

 loosa Creek. In Brock Creek near Roelofs, 

 Esox americanus, Notropis cornutus, Erimyzon 

 sucetta ohlongus and Boleosoma were found, 

 the last two also occurring in isolated pools in 

 the course of Common Creek near Fallsington, 

 associated with Notropis hifrenaius, Aphredo- 

 derus sayanus and Enneacanihus gloriosus. 

 The last species was also met with in the creek 

 near the village of Penn's Manor, with Ahramis 

 crysoleucas, Ameiurus nehulosus, Bchilbeodes 

 gyrinus, Fundulus diaphanus, Apelies qua- 

 dracus, Lepomis auritus and Eupomoiis gih- 

 hosus. In Chester County, in the various 

 headwaters of the White Clay Creek, near 

 Londongrove, only Balvelinus fontinalis, Rhi- 

 nichihys and Boleosoma were met with abun- 

 dantly. 



Heney W. Fowler 

 Academy op Natural Sciences 

 OP Philadelphia, 

 October 31, 1914 



THE CONVOCATION WEEK MEETING OF 

 SCIENTIFIC SOCIETIES 



The American Association for the Advance- 

 ment of Science and the national scientific 

 societies named below wiU meet at Philadel- 

 phia, during convocation week, beginning on 

 December 28, 1914: 



American Association for the Advancement of 

 Science. — President, Dr. Charles W. Eliot, Har- 

 vard University; retiring president, Professor 

 Edmund B. Wilson, Columbia University; perma- 

 nent secretary. Dr. L. O. Howard, Smithsoniaji 

 Institution, Washingfton, D. C; general secretary, 



