. Carnegie Institution of Washington publication. . Fig. 16.— Chimaeroid egg-cap- sule. Mid-Pacific. (Ventral aspect.) After Carman. About two-thirds natural size. Fig. 1 7. — Egg-capsule of Chi- masra monstrosa. Norway. (Ventral aspect.) Natural size. sule (fig. 16), differs widely from other recent forms. It has thus a remark- ably long tail-sheath; is provided with a distinct type of lateral web, for its rugae are few in number and restricted to the region of the trunk-case, and there are no conspicuous rugae arising from the hinge of the opercular flap, dividing a precardinal from a post-
. Carnegie Institution of Washington publication. . Fig. 16.— Chimaeroid egg-cap- sule. Mid-Pacific. (Ventral aspect.) After Carman. About two-thirds natural size. Fig. 1 7. — Egg-capsule of Chi- masra monstrosa. Norway. (Ventral aspect.) Natural size. sule (fig. 16), differs widely from other recent forms. It has thus a remark- ably long tail-sheath; is provided with a distinct type of lateral web, for its rugae are few in number and restricted to the region of the trunk-case, and there are no conspicuous rugae arising from the hinge of the opercular flap, dividing a precardinal from a post- cardinal lateral web, as in the other forms. These differences are so striking that I am quite convinced that this capsule represents a new genus.* Garman himself tells us nothing of its antece- dents, and as he on one page refers to it as belonging to Callorhynchns antarctiais and on another to Callo- rhynchtis callorhynchus, I infer that he attributes it to the latter species and that he regards these terms as synony- mous. Chimsera. Capsules somewhat tadpole-shaped, with large trunk-sheath, short snout-, and long, tapering tail-sheath; lateral web narrow, with rug» faint, if present at all. Opercular flap forward to end of case; serrulae pres- ent, beginning far forward, a part of the complicated apparatus of opercular ridges {cf. pi. Ill, fig. 17, A, B, c) ; caudal pores many, opening on both dorsal and ventral sides. A dorsal keel present. Capsules thin, parchment-like, smooth or slightly ridged. The species differ in well-marked details, , in width of lateral web, length of tail-sheath, modeling of trunk- and snout-case, texture, number of serrulae, etc. If arranged in a com- parative series {cf. table, p. 30, and figs- 17, rS, 21, 22), C. co//iei stands closest to the type of Carman's capsule, and C niilsukiirii is ob- viously the most specialized. *This might be christened and specified by a systematist who does not hesitate ultimately to complicate Ch
Size: 1109px × 2253px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1900, bookyear1906
