. Bulletin of the British Museum (Natural History). THE "ROSAURA" EXPEDITION 169 (i) Preserved material in 70% spirit transferred to distilled water—15 minutes. (2) Partly cleared in 0-5% KOH solution—30 min. (3) Stained in an old deep purple solution of alizarin in distilled water—16^ hours. (4) 0'5% KOH solution—70 minutes. At this stage the specimen was still understained, so staining was repeated with a freshly-prepared solution. (5) Solution of about ^ of alizarin powder in 200 distilled water—2 hours. (6) Solution of 2 volumes of 0-5 KOH to i volume of pure glycerine.
. Bulletin of the British Museum (Natural History). THE "ROSAURA" EXPEDITION 169 (i) Preserved material in 70% spirit transferred to distilled water—15 minutes. (2) Partly cleared in 0-5% KOH solution—30 min. (3) Stained in an old deep purple solution of alizarin in distilled water—16^ hours. (4) 0'5% KOH solution—70 minutes. At this stage the specimen was still understained, so staining was repeated with a freshly-prepared solution. (5) Solution of about ^ of alizarin powder in 200 distilled water—2 hours. (6) Solution of 2 volumes of 0-5 KOH to i volume of pure glycerine. During the next 24 hours glycerine was added a little at a time until the specimen could safely be transferred to pure glycerine containing a thymol crystal as preservative. The untreated specimen had sustained compound fractures of the cleithra and wanted parts of two teeth. Processing was accomplished without further damage, but there were several breakages of caudal and branchiostegal rays during subse-. Text-fig. 2. Rosaura rotunda. Anterior view of head from below. quent study and manipulation, which do not seem very serious in proportion to the additional information gained. The text-figures were drawn freehand with the assistance of a 5 X 5 eyepiece graticule, calibrated with a stage Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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Keywords: ., 1955, boo, bookauthorbritishmuseumnaturalhistory, bookcentury1900
