The Nautilus . LvfX 1 W/ 21 1 Kr v^mf. Figures 20-22. Histology of Waldo parasiticus (South Georgia Islands, MLP 6505). 20. Transverse section at the posterior endof the visceral mass. 21. Transverse section at the anterior half of the visceral mass. 22. Detail of the free mantle border, al:ascending lamella of inner demibranch; bs: brooding space; dl: descending lamella of inner demibraneh; id: inner demibranch; m:mantle; mf: expanded mantle fold; p; periostracum; po: pedal opening r; rectum; t: tentacle. Scale bars: 200 |xm. cated at the base of the heel secreting a byssus of 3 to5 filaments
The Nautilus . LvfX 1 W/ 21 1 Kr v^mf. Figures 20-22. Histology of Waldo parasiticus (South Georgia Islands, MLP 6505). 20. Transverse section at the posterior endof the visceral mass. 21. Transverse section at the anterior half of the visceral mass. 22. Detail of the free mantle border, al:ascending lamella of inner demibranch; bs: brooding space; dl: descending lamella of inner demibraneh; id: inner demibranch; m:mantle; mf: expanded mantle fold; p; periostracum; po: pedal opening r; rectum; t: tentacle. Scale bars: 200 |xm. cated at the base of the heel secreting a byssus of 3 to5 filaments. Kerguelen Islands. Type Locality: Material Examined: Lectotype (here designated)(Figures 2, 3) and numerous paralectotypes (>50 se-verely damaged specimens and loose valves) of Leptonparasiticum (USNM 11907); syntypes of Montacutachristenseni (BM 35268 and 35270) (mostly decalcified);numerous specimens from Deception Island, BransfieldStrait, South Shetland Islands (USNM 613095), and54°18 S, 35° 30 W, South Georgia Islands, 94
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmollusks, bookyear188
