August 24, 1917] 



SCIENCE 



195 



ily AndrenidsB are probably the most effective 

 pollinators of the \'iiie and that beetles are of only 

 minor importance. Bees of the family Mega- 

 chilidse are also active workers and undoubtedly 

 contribute considerably toward the production of 

 fruit. 



Saprolegnia anisospora in America: W. C. Cokeb. 

 This species has not before been reported in 

 America. We have found it twice in Chapel Hill, 

 in marshy shaded places containing algse. It is dis- 

 tingnished chiefly by the following characters: 



1. The presence of spores of two or three sizes, 

 borne usually in separate sporangia without re- 

 gai'd to the size of the latter; the small spores 

 from 10.5-11 fj. in diameter, the large ones from 

 13.7-14.8 /J, in diameter. In nearly all cultures 

 there are formed a few very large spores, at least 

 twice the size of the ordinary large ones, these ap- 

 pearing mixed in with the latter. 



2. The irregular shape of the sporangia, which 

 are not evenly cyUndrieal, but more or less waved, 

 bent and constricted, and which proliferate either 

 laterally from below as in Achlya, or within the 

 old ones, as is usual in Saprolegnia. 



3. In sexual reproduction numerous oogonia are 

 formed, each -n-ith one or more antheridia of di- 

 clinous origin. 



The jaws of tlie great barracuda, Sphyrcena barra- 

 cuda: E. W. GUDGER. 



A careful description, illustrated by photographs 

 and a specimen, was given of the teeth and jaws of 

 this fish. Their use was briefly described and 

 some accounts of the ferocity of the fish narrated. 

 In the waters of southern Florida it is generally 

 more feared than the shark, being bold and in- 

 quisitive where the shark is cowardly. The data 

 presented are part of a paper now in press in a 

 volume of memoirs from the Tortugas Laboratory 

 of the Carnegie Institution at Washington. 



The status of the science lOorTc in the high schools 

 of North Carolina (lantern) : S. J. Marion. 

 This survey and report will be published in full 



in the forthcoming issue of the North Carolina 



Sigh School bulletin. 



Armillaria mellea, Clitocybe cespitosa, Fleurotus 

 sapidus and Claudopus iiidulans in pure culture: 



H. E. TOTTEN. 



The fact that the spores of Armillaria mellea 

 and Clitocybe cespitosa (C monodelpha) have two 

 walls, while the spores of Fleurotus sapidus and 

 Claudopus nididans have only one wall is plainly 

 shown in the sprouting spores. Mycelia of the 

 four mushrooms were shown in pure culture on 



several media, also drawings of the mycelial 

 threads as seen under high power. Armillaria 

 mellea forms a slow-growing, closely floceulent, 

 cream-colored mat, and soon produces long, brown 

 to black, root-like rhizomorphs. In agar these 

 rhizomorphs are beautifully shown radiating from 

 the mat-like central mass. The mycelium of 

 Clitocybe cespitosa is much like that of Armillaria 

 mellea, but the threads are not so closely woven 

 and the rhizomorphs, or root-like bodies, are 

 white. It is shown that Armillaria mellea and Clito- 

 cybe cespitosa, while very closely related, are not 

 the same. The myceliuni of Claudopus iiidulans is 

 silkier and is from white to pink in color. The 

 mycelium of Fleurotus sapidus except in old cul- 

 tures is loose and silky and is very fast growing, 

 soon covering the medium with a mass of pure 

 white threads. Fruiting bodies of both Fleurotus 

 sapidus and Claudopus nidulans were shown de- 

 veloping in pure cultures. 

 Structural geology of Orange county, N. C: John 



E. Smith. 



With few exceptions the rocks of this county 

 occur in long, narrow belts and "islands" extend- 

 ing north 65° east. Named in their order from the 

 southeast these areas comprise the Triassie sedi- 

 mentaries, granite, diorite, rhyolite, schists and 

 greenstone, diorite, schists and phyllite, green- 

 stone and schists, diorite, schists and greenstone, 

 diorite, granite. 



The structure of these rocks is that of a syncline 

 whose trough centers along the line of strike and 

 passes near Cheek's Siding about three miles east 

 of Mebane. Measured along the dip this syncline 

 is approximately twenty miles wide and probably 

 contains folds of minor importance within it. The 

 major joints, flow lines, etc., of the igneous rocks 

 in many places parallel both the dip and the 

 strike of the schists belts. Inclusions of the 

 diorite in the granite attest the greater age of the 

 former and the presence of belts of igneous rocks 

 beneath the margins of the syncline certify their 

 contribution to the structure and prove the greater 

 age of the schists, etc. South of Chapel HiU be- 

 yond Morgan Creek the strike is due east and west 

 and the conglomerates, slates and rhyolites dip to 

 the south at an angle of 65°. (Illustrated with 

 maps, charts and structure sections.) 

 State regulation of the sale and manufacture of 



gas: C. W. Edwards. 



In 1910, out of 223 cities in the United States 

 of more than 25,000 population, only 47 had no 

 requirements such as are in a bill proposed for 

 North Carolina. Of these 228 cities, 103 are 



