BU 



SCIENCE 



[N. S. Vol. XXXIV. No. 879 



found out under the waves, by consolidation 

 and depression as the barrier beach worked 

 over them, describing a place where wagon 

 tracks occurred. Of course. Professor John- 

 son does not deny that there has been sub- 

 sidence and peat formed at lower levels, but 

 probably several thousand years ago. 



After dinner Professor Lane took charge 

 of one party (while others studied the peat) 

 and showed typical gabbro and various diabase 

 dikes. He called attention to the basaltic 

 columnar structure of some of these dikes and 

 also a jointing which enabled one to obtain 

 the dip of the main gabbro mass itself. Bass 

 Beach and Canoe Beach both oilered excel- 

 lent opportunity to see the beach scallops in 

 formation. Passing on to Pulpit Pock the 

 finer grain of the gabbro near the contact was 

 noticed and its contact with siliceous and 

 argillaceous limestones changed to epidote 

 and garnet rocks and black basanite. Some 

 of the party found Hyolithes while others 

 passing back along the north shore of the is- 

 land had a good chance to observe the differ- 

 entiation of the gabbro into a salic or syenitic 

 phase (which Professor Lane called a gabbro 

 aplite) and a dark peridotic phase near 

 Black Mine. There were numerous other 

 points of interest which attracted some of the 

 crowd (which gradually dispersed) such as 

 faults and the comparison of the rounding of 

 the pebbles with those of the overwash gravel 

 plain. 



E. H. & A. C. L. 



SPECIAL ARTICLES 



A NEW MINNOW FROM COLORADO 



A SMALL fish collected by Mr. Horace G. 

 Smith at Julesburg, Colo., has been the occa- 

 sion of much correspondence and discussion, 

 but may now be brought forward as appar- 

 ently undescribed. 



Notropis horatii n. sp. 

 Type. Length 58 mm., to base of caudal 

 47; depth 9 mm., width 5J; D. 8, A. 9; scales 

 5 or 6 — 38 to 40 — 4; dorsal region clear fer- 

 ruginous, with a fine dusky band; a rather 

 broad lateral silvery band; scales of lateral 



line with little dark spots, as in N. telescopus; 

 fins yellowish-white, no spot on dorsal or 

 caudal; front of dorsal to base of caudal 

 24 mm., to end of snout 23; dorsal fin begin- 

 ning a little anterior to level of pelvic; region 

 before dorsal not bare of scales. Scales with 

 9 apical radii. 



This was supposed to be N. piptolepis 

 (Cope) or N. gilherti Jordan & Meek, these 

 two names being considered by Drs. Ever- 

 mann and Kendall probably synonymous. At 

 the U. S. National Museum I found the type 

 of N. gilherti, which proves to be very dis- 

 tinct, as follows : 



1. N. gilherti, type. Diameter of eye 3.9 

 mm., snout beyond eye 3; depth of head 7.35 

 mm. ; snout to base of caudal 39 ; beginning of 

 dorsal level with beginning of ventral; no 

 dark dorsal band; ventral scales exceedingly 

 broad. 



2. N. horatii, type. Diameter of eye 3, 

 snout beyond eye 3.4 ; depth of head 6.35 mm. ; 

 snout to base of caudal i45.5; beginning of 

 dorsal in front of beginning of ventral; a 

 dark dorsal band; ventral scales ordinary. 



Both have a silvery lateral band; the dorsal 

 area of gilherti is darker and redder. The 

 dorsal profile of head and anterior part of 

 body in horatii is practically flat. The cor- 

 ners of the mouth in horatii are a little an- 

 terior to the level of front of eye. 



The question now arises whether the fish 

 can be N. piptolepis, to which it runs in my 

 table of Colorado Cyprinidse (Univ. of Colo. 

 Studies, Vol. V., No. 3). The type of pipto- 

 lepis seems to be lost, as it was not found at 

 the National Museum, and Fowler does not 

 list it in his account of the species in the 

 collection at Philadelphia. Possibly the name 

 may have to be given up as undeterminable, 

 but we have a mason-jar full of a species col- 

 lected in Boulder Creek by Juday, recorded 

 by him as piptolepis and accepted as such by 

 me. This fish is certainly quite distinct from 

 horatii, and I believe it to be Cope's species. 

 Although N. horatii is doubtless of the imme- 

 diate alliance of piptolepis and gilherti, it is 

 superficially very like N. stilhius and N. tele- 

 scopus, in another group. The species is 



