File:Report on the scientific results of the voyage of H. M. S. Challenger during the years 1873-76 under the command of Captain George S. Nares... and the late Captain Frank Tourle Thomson, R. N (1880) (14579552087).jpg

Identifier: reportonscientif195456grea (find matches)
Title: Report on the scientific results of the voyage of H. M. S. Challenger during the years 1873-76 under the command of Captain George S. Nares... and the late Captain Frank Tourle Thomson, R. N
Year: 1880 (1880s)
Authors: Great Britain. Challenger Office Thomson, C. Wyville (Charles Wyville), Sir, 1830-1882 Murray, John, Sir, 1841-1914 Nares, George S. (George Strong), 1831-1915 Thomson, Frank Tourle
Subjects: Challenger Expedition, 1872-1876 Ocean Marine animals
Publisher: (Edinburgh) : Printed for H. M. Stationery off. (by Neill and company)
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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Text Appearing Before Image:
ous layer forming an investment to the nerve-tissue; prs, the proboscidian sheath inoutline. Fig. 8. Cerehratulus macroren, n. sp. A few sections further backwards. The medullary nerve m is,here more distinct, its anterior continuation m being on the point of coalescing with it.Lettering as in fig. 7. pr, outline of the proboscis ; Br, fibrous core of the brain-lobe. Fig, 9. Cm-ehratulus medullaius, n. sj). Transverse section of the medullary nerve (ui). pi, the i)lexus ;/5 and a, the circular and longitudinal muscular layers ; (inner circular muscular fibresare seen to form the outer layer of the proboscidian sheath); prn, the proboscidian sheathnerve, receiving delicate fibres from the medullary nerve and situated just above the pro-boscidian sheath musculature. Fig. 10. Cerehratulus mednllatus, n. sp. Integument and muscular body wall. Lettering as in fig. 2.(/;//, the deeper glands of the integument enclosed in the musculature. The Voyage of H M SChallen^i Nemertea.Pl XII. prn. dp
Text Appearing After Image:
> St-^»ioA ;?,3p^(j;j -^-k^j 0^ Hiitii-eclit et ie Groot Jel FHulk.Ljth EJir, C E R E B R A T U L U S . D R E P A N 0 P H 0 R U S . PIATE XIIL (ZOOL. CHALL. EXP. PART LIV. 1887.) Hhh. PLATE XIII. Fig. 1. Cerehratuhis corrugatus, MInt. Transverse section tlnough part of the superior brain-lobes anddorsal brain commissure. Part of tlie fibrous core (7i) is represented; its contimiatiou into thefibres of the commissure (f.cn) being distinctly noticed on the left side. On the right thisconnection is only visible a few sections further. The bulk of the brain-lobe is seen to con-sist of nerve-cells of different sizes (n.r!); from these a cephalic nerve (<■«) is seen to emergeon the left, whereas this cellular coating is also continued over the commissure, and thereforms the starting point (m) for the longitudinal dorso-median medullajy nerve. Fig. 2. Cerebrafidus fornnjaim, MInt. Horizontal section of the same specimen through the medullarynerve m. In this section only a portion o

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