Australian Museum Journal XIV. The Enteropneusta. Part II
- Shortform:
- Hill, 1897, Aust. Mus. Mem. 3(5): 336–348
- Author(s):
- Hill, J. P.
- Year published:
- 1897
- Title:
- XIV. The Enteropneusta. Part II
- Serial title:
- Australian Museum Memoir
- Volume:
- 3
- Issue:
- 5
- Start page:
- 336
- End page:
- 348
- DOI:
- 10.3853/j.0067-1967.3.1897.500
- Language:
- English
- Plates:
- plates xix–xxii
- Date published:
- 17 November 1897
- Cover date:
- 17 November 1897
- ISSN:
- 0067-1967
- CODEN:
- AUNMA5
- Publisher:
- The Australian Museum
- Place published:
- Sydney, Australia
- Digitized:
- 20 February 2009
- Available online:
- 16 July 2009
- Reference number:
- 500
- EndNote package:
- EndNote file
- Title page:
- Title page (76kb PDF)
- Complete work:
- Complete work (1845kb PDF)
Abstract
[Summary, printed on p. 345]. (1) The Pacific species, P. hedleyi, is to be associated with the two European species P. minuta and P. sarniensis in the subgenus Ptychodera (sensu stricto), especially characterised by the rudimentary character of the genital pleura.
(2) In the possession of a continuous axial canal in the dorsal nerve cord, opening both anteriorly and posteriorly, P. hedleyi agrees with P. sarniensis, while in the possession of two longitudinal epidermal stripes overlying the two ciliated grooves of the intestine, it agrees with P. australiensis.
(3) P. hedleyi exhibits affinities with the members of the subgenus Chlamydothorax (P. erythrcea, P. bahamensis, and P. flava) in the possession of a dorsal thick-walled glandular division of the intestine just behind the branchial region. It is suggested that this dorsal diverticulum may, in P. hedleyi, have some digestive function.
(4) As regards the degree of development of the dorso-ventral muscle plate, P. hedleyi may be best compared with Balanoglossus kupfferi.
(5) P. hedleyi differs from all hitherto described species of the genus Ptychodera, and agrees with the members of the genus Balanoglossus in the absence of a circular musculature in the trunk.