Teleosts with a conus arteriosus having more than one row of valves / by Harold D. Senior.

  • Senior, Harold D.
Date:
1907
Catalogue details

Licence: In copyright

Credit: Teleosts with a conus arteriosus having more than one row of valves / by Harold D. Senior. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    May I, ’07. The Anatomical Record TELEOSTS WITH A CONUS ARTEUIOSUS HAVING MOUE THAN ONE HOW OF VALVES. By IIaroi.d D. Senior. Washington University, St. Louis, Mo. With 1 figure. The teleostoan genera believed to be most closely related to Amia calva are Elops, lUegalops, Tarpon, Albula and rterotbrissus, tbe first three belonging to the family Elopidae and tbe last two to tbe Albulidie. In all these genera tbe heart has a distinct muscular conus arteriosus which is, except ill the case of Elops, furnished with two transverse tiers of valves. That Riitirimis (Albula) differed from tbe majority of teleosts in having two tiers of valves at the arterial end of the heart, was pointed out by Stanniiis in 1846. An excellent description of the heart of this fish was given by Boaz in 1880 in the light of Gegenbaiir’s important work showing the essential difference between eoniis and biilbus. .Tobaniies Mueller, Eeber den Bau und die Grenzen der Ganoiden, 1846, remarks that Elops, among other teleosts examined by him, has only one tier of arterial valves, a statement which lias been verified by an examination of two specimens of E. saurus. A description of tbe conus in Tarpon atlanticus appeared lu the Biological Bulletin for last February, and a note on the conus of IMegalops cyprinoides will appear in tbe same journal in April or ]May. The heart from a specimen of Pterotbrissiis gissii (Hilgendorf) measuring 24.5 cm. including caudal fin is here described for tbe first time. Tbe conus arteriosus in Pterotbrissiis is plainly visible from the ex- terior, although its base is, ventrally and to the right, to some extent buried in the ventricle. Dorsally and to the left the eoniis is in contact with visceral pericardium practically from end to end. Tbe bulbiw, The Anatomical UF.rnnn.— No. 4.