. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Deep Sea Protobranchs • Allen and Sanders 21 digestive tubules. digestive tubule right hind gut visceral commissures pedal ganglia nd gut Figure 18. Spinula scheltemai. Transverse section through viscera and foot to show position of hind gut and stomach. Pedal ganglia also present with distal end of style sac and proximal end of hind gut in section. be fully mature. The larval shell mea- sures about 375 /xm—the smallest re- corded for an Atlantic Spinula. Spinula subexcisa (Dautzenberg and Fischer, 1897) Figures 22-28
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Deep Sea Protobranchs • Allen and Sanders 21 digestive tubules. digestive tubule right hind gut visceral commissures pedal ganglia nd gut Figure 18. Spinula scheltemai. Transverse section through viscera and foot to show position of hind gut and stomach. Pedal ganglia also present with distal end of style sac and proximal end of hind gut in section. be fully mature. The larval shell mea- sures about 375 /xm—the smallest re- corded for an Atlantic Spinula. Spinula subexcisa (Dautzenberg and Fischer, 1897) Figures 22-28 Leda excisa var. subexcisa (Dautzenberg and Fisch- er, 1897: 205. (Type locality: Azores, PRIN- CESSE-ALICE, Station 69, in 1846 m; type specimen supposedK' housed in Institut Ocean- ographique, Monaco, present whereabouts un- known.) Previous records (see p. 2): Throughout Atlantic, 1848-5153 m. Probably many previous records have been confused with other species described in this paper. The Norwegian and VV. European records can be accepted with some degree of cer- taint>-. Present record: West Europe Basin, 1993 m. Historical. The first record of S. .sub- excisa was almost certainly that de- scribed by Jeffreys (1876, 1879) and in- correctly referred to as Malletia excisa (Philippi). The specimens examined by Jeffreys were taken by the PORCUPINE and LIGHTNING expeditions from a po- sition very close to that of the present rec- ords for S. subexcisa. Jeffreys (1876, 1879), like ourselves, only recognized one species from the area. Jeffreys re- garded his specimens as being recent ex- amples of the Sicilian fossil Nucula ex- cisa Philippi (1844). As a result he did not figure his specimens, nor did he give a sufficiently accurate description of the specimen to confirm its specific identity. Smith (1885), who identified a specimen as being the same species as that de-. Please note that these images are extracted from scanned page images that may have been digitally enha
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