. The Cambridge natural history. Zoology. 554 ECHINODERMATA ECHINOIDEA chap. Pam. 2. Nucleolidae.—" Petals " distinct; peristome as in the foregoing family. No floscelle. JVudeolites, with the anus in a furrow. Anochanus, with a concave apical system serving as brood-pouch. Fam. 3. Cassidulidae.—" Petals " usually distinct; peristome eccentric, but provided with a well-marked floscelle. Uchinolampas, with the anus on the under surface. JSfeolampas, with the anus on a projecting papilla. One specimen of this genus has been dredged in the British area. The three foregoing fam
. The Cambridge natural history. Zoology. 554 ECHINODERMATA ECHINOIDEA chap. Pam. 2. Nucleolidae.—" Petals " distinct; peristome as in the foregoing family. No floscelle. JVudeolites, with the anus in a furrow. Anochanus, with a concave apical system serving as brood-pouch. Fam. 3. Cassidulidae.—" Petals " usually distinct; peristome eccentric, but provided with a well-marked floscelle. Uchinolampas, with the anus on the under surface. JSfeolampas, with the anus on a projecting papilla. One specimen of this genus has been dredged in the British area. The three foregoing families probably use their tube-feet to walk with, and bury themselves only to a slight extent. They are often united as a sub-order, the Asternata, and distinguished from all the rest which possess an eccentric mouth and well- marked plastron. These families are then grouped together as Stebnata. They are as follows :— Fam. 4. Ananchytidae.''—Spatangoidea with elongated apical system, ambulacra all similar and not grooved. Petals feebly. f^^^f^'y^^^^^^ _. 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 Harmer, S. F. (Sidney Frederic), Sir, 1862- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
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