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.