. The annals and magazine of natural history : zoology, botany, and geology . ; andin the oral armature, which consists of ten to twelve slender,uniform, terete, opaque, blunt marginal spinelets, united by an * The Echinoderms of Torres Strait, Carnegie Institution ofWashington, Publication No. 214, 1921, p. 98, pi. xxiii. tigs. 3 and 4. 416 INFr. ^y. K. Fislior on a opaque web into a continuous series of twenty to twenty-fourfor the two plates (median spinelets not enlarged) ; stiboralwebbed series, ?-form, of seven to nine spinelets, of which theinnermost are very much tlie longest. E,= 15 m
. The annals and magazine of natural history : zoology, botany, and geology . ; andin the oral armature, which consists of ten to twelve slender,uniform, terete, opaque, blunt marginal spinelets, united by an * The Echinoderms of Torres Strait, Carnegie Institution ofWashington, Publication No. 214, 1921, p. 98, pi. xxiii. tigs. 3 and 4. 416 INFr. ^y. K. Fislior on a opaque web into a continuous series of twenty to twenty-fourfor the two plates (median spinelets not enlarged) ; stiboralwebbed series, ?-form, of seven to nine spinelets, of which theinnermost are very much tlie longest. E,= 15 mm., r=ll mm.,R = l-36r; entire diameter 30 mm.; disk rather thin, butarched radially ; rays broad, rounded. Description.—Abjictinal suiface ])aved with closely imbri-cated plates, which decrease in size, centrifugally, from analregion. Adcentral side of plates of papular area stronglyconcave to admit the passage of the single papula. Thispapular area includes the centre of disk (where the papulre,on account of size of j)late, are more spaced) and a broad Fig. 1. Fier. Fjg. 1.—Mouth-plates and first adambulacral plate. X 10. The .spinesare invisible in the dried specimen, as on the right of the figure. Fig. 2.—Three abactinal spinelets, 028, 0-17, and 0-135 mm. long,respectively. X about 200, petaloid area on each ray which extends to within to 3o the ray-tip and excludes a marginal band of about thesame width. At the widest part the areas include 12 longi-tudinal rows of plates and twelve longiseries of papula?. The plates of two radial or carinal series are imbricated, sothat the concavity faces towards the margin and adcentrally—hence away from the radial line. Those of the five longi-series on either side have the concavity facing adcentrally,but towards the radial line. This causes the two radial seriesto be marked off from the others. The plates of the papulararea have a crescentic group of numerous very ^me, spicules fieio Sea-star from I long Knug. 417
Size: 1804px × 1384px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdec, booksubjectnaturalhistory, bookyear1838
