. A manual of zoology. Zoology. 328 COELHELMINTHES. Now tliere are but few species, some inhabitants of the greatest depths of the Fig. 301.—Development of brachioporl. (After Kowalevsky.) with early enterocfjelic jiouches; _B, closure of blastopore; C, cfjelom separated, body annu- lated; J>, cephalic disc and mantle developing, the latter with long setip; K, at- tached embryo, the mantle lobes folded over cephalic disc (setee omitted), c, cephalic disc; d, dorsal lobe of mantle; e, enteroccele; »*), mantle; \\ ventrol man- tle lobe. Order I. Ecardines. Hinge absent.; valv
. A manual of zoology. Zoology. 328 COELHELMINTHES. Now tliere are but few species, some inhabitants of the greatest depths of the Fig. 301.—Development of brachioporl. (After Kowalevsky.) with early enterocfjelic jiouches; _B, closure of blastopore; C, cfjelom separated, body annu- lated; J>, cephalic disc and mantle developing, the latter with long setip; K, at- tached embryo, the mantle lobes folded over cephalic disc (setee omitted), c, cephalic disc; d, dorsal lobe of mantle; e, enteroccele; »*), mantle; \\ ventrol man- tle lobe. Order I. Ecardines. Hinge absent.; valves similar when the stalk passes out between them ilAngnla *), or unequal when the ventral is perfo- rated by the stalk (Disci/ia) or when the animal is directly attached by the shell (Crania). Order II. Testicardines. Hinge present, valves unequal, the ventral perforated by the .stalk; anus degenerate. Rhyn- choiiella* Terehrattdina* in our colder waters. liG M-Tnchratunnam:>- ^P'"f''''' Orthw, 4?r)/;i«, important teiitiionalis* fossil 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
