The Annals and magazine of natural history; zoology, botany, and geology . Outlines of scuta from two para types of Meyalamia (Glyptelasma) carina-turn (Hoek). The larger from a specimen of capitular length8-5 mm., the smaller from one measuring G-5 mm. Variation.—The paratypes, which are all much smallerthan the holotype, differ from it more or less in the outline ofthe scutum (fig. 2). The basal margin is straight or evenslightly concave, and its junction with the occludent marginat the umbo is marked by a distinct angle; the angle formed Type-specimens of Poecilasma cavinatum. 405 with the
The Annals and magazine of natural history; zoology, botany, and geology . Outlines of scuta from two para types of Meyalamia (Glyptelasma) carina-turn (Hoek). The larger from a specimen of capitular length8-5 mm., the smaller from one measuring G-5 mm. Variation.—The paratypes, which are all much smallerthan the holotype, differ from it more or less in the outline ofthe scutum (fig. 2). The basal margin is straight or evenslightly concave, and its junction with the occludent marginat the umbo is marked by a distinct angle; the angle formed Type-specimens of Poecilasma cavinatum. 405 with the chord of the occludeut margin is always very convexity of the occludent margin varies considerably,as shown in the figures, and so also does the curvature of thecarinal margin. The median ridge of the carina stops a littleshort of the base, forming a tooth which is most prominentin the smallest specimens. Fig. Megalasma {Glyptelasma) carinatum (Hoek). Specimen from coast ofCuba. Body, from the side, to show dorsal filamentary ap-pendages, first cirrus, and caudal appendages. In the specimen figured by Gruvel the outline of thescutum differs only very slightly from that of the holotype ;Gruvels figures represent rather too sharp an angle betweenthe basal and occludent margins. The other specimens fromthe same locality show considerable variation in this respect; 40G Dr. W. T. Caiman on the the basal margin may form a continuous curve with theoccludent margin or it may meet it in a distinct angle at theumbo ; the angle which it forms with the chord of the occlu-dent margin varies, although it is always noticeably greaterthan a right angle ; the ba3al margin may be straight orslightly concave or convex ; and it may be equal to or shorterthan the base of the carina. In Gruvels specimen and in the others that have beendissected the filamentary appendages (fig. 3), althoughvarying in number, rese
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