Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . .r Fig. 284. Amphitetras autedi-luviana, var. S x 400. Fig. 285. Amphitetrascrucifera, x 800. Var. o, with three straight or slightly convex sides,angles widely rounded; in other respects like thetypical form. Rare; in a small gathering fromJoppa. (Pig. 284, x 400 diam.) Amphitetras crucifera.—Valve minute, with pro-duced mammiform apices; surface of valve minutelypunctate, with a cruciform blank space extendingfrom the centre to the angles. Cleanings from WestIndian shells. (Fig. 2
Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . .r Fig. 284. Amphitetras autedi-luviana, var. S x 400. Fig. 285. Amphitetrascrucifera, x 800. Var. o, with three straight or slightly convex sides,angles widely rounded; in other respects like thetypical form. Rare; in a small gathering fromJoppa. (Pig. 284, x 400 diam.) Amphitetras crucifera.—Valve minute, with pro-duced mammiform apices; surface of valve minutelypunctate, with a cruciform blank space extendingfrom the centre to the angles. Cleanings from WestIndian shells. (Fig. 285, x 800 diam.) Amphitetras ornata (?) var. (i.—Valve with sidesslightly incurved; angles produced, portion of valve reticulate and punctate ;the broad portions of the angles apparently girtwith a punctate and costate band. This variety 272 HARDWICKES SCIENCE-GOSS [Dec. 1, 1867. differs from the typical forms described by Shadbolt,both in its large size, more conspicuous venation,and the curious band apparently girding and con-stricting the angles ; but as it has, I believe, been. Fig. 286. Amphitetras ornata (?), var. /3 x 400. only found in AlgoaBay guano,it would be rash to make it a new species. It may possibly be the sporangial state of Amphitetras ornata. (Fig. 284 > x 400diam.) Norwich. Fred. Kitton. TEMPERATURE OF LAKES. AMONG the communications lately made to theAcademy of Munich are some observationsby Herr v. Schlagintweit on the temperature in thedeeper parts of the Starnberger See and the ChiemSee. A few observations on these measurementswill not be out of place, as they prove, in an un-expected manner, that the Starnberger See, not-withstanding its having an influx and outflow ofwater, is sufficiently deep and large to be perfectlycold at the bottom. In the salt lakes of Thibet (which first gave riseto investigations being made in the above-namedAlpine lakes, for the sake of comparison) there isthis peculiarity, that except on days w
Size: 1562px × 1600px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
