OCR Text |
Show 1879.] ' LIGHTNING ' AND ' P O R C U P I N E ' EXPEDITIONS. 583 figured by Seguenza as N. umbonata. This species differs from N. proximo, Say, in shape and sculpture, and is much smaller and less solid. 6. NUCULA RETICULATA, Jeffreys. (Plate XLVI. fig. 7.) N. reticulata, Jeffr. in Ann. and Mag. N. H. Nov. 1876, p. 429. 'Porcupine' Exp. 1869: St. 16, 19, 20, 21, 23a, 28, 30. Distribution. 'Valorous' Exp., 'Challenger' Exp. (off San Miguel, Azores); 1000-1100 fms. JV. reticulata of Hanley (from the Philippines) is a species of Leda. 7. NUCULA STRIATISSIMA, Seguenza. JV. striatissima, Seg. Nuc. terz. merid. d'lt. p. 6, t, i. f. la-c. ^ 'Porcupine' Exp. 1870 : Atl. St. 17. A single but perfect specimen. Fossil. Pliocene. Messina district. This is more closely and finely striated than any other known species of Nucula. The JV. trigona of Seguenza seems to be a variety, judging from the examination of a specimen which he kindly sent me for that purpose. I do not like the barbarous name striatissima ; hut it is more characteristic than trigona, because all the species of the present genus are more or less triangular. Seguenza describes JV. trigona as smooth (leevis); but his figure and specimen show that it is closely striated lengthwise. 8. NUCULA SULCATA, Bronn. JV. sulcata, Bronn, Italiens Tertiar-Gebilde, p. 109 (1831) : B. C. ii. p. 141 ; v. p. 172, pi. xxix. f. 1, la. 'Porcupine' Exp. 1869: St. 1, 6, 9, Galway B., 13, 17, 18, the Minch, Little Minch, Loch Torridon. 1870 : Atl. 3a, 9, 10, 13, Setubal B., 22, 25, off C. Sagres, 26-30, 36 ; Med. 45, Capo de Gata, Cartagena B., 50, off Jijeli, Benzert Road, Rasel Amoush, Adventure Bank, off Rinaldo's Chair. The sculpture varies considerably in its comparative coarseness or fineness. Distribution. Norway to the iEgean and Sea of Marmora, and the Adriatic ; 5-190 fms. Fossil. Miocene, Pliocene, and Post-tertiary. Bohusliin, Caithness, N.W. Germany, Biot, Italy, and Rhodes. JV. polii, Philippi, and other obsolete synonyms. Not JV. sulcata, A. Adams, from New Zealand. 9. NUCULA NUCLEUS, Linne. Arca nucleus, L. S. N. p. 1143. JV. nucleus, B. C. ii. p. 143, pi. iv. f. 1 ; v. p. 172, pi. xxix. f. 2. ' Lightning' Exp.: St. 4. 'Porcupine' Exp. 1869: St. 1, 2, 6, 9, 14, 18, near Belfast. 1870 : Med. Capo de Gata, Rasel Amoush. Distribution. Norway to Mogador, and through the Mediterranean eastward to the coast of Egypt, and the Adriatic; 2-145 fms. |