CESTODES FROM FISHES — LINTON 423 



cephalus microcephalus, and Dlhothrium microcephalum) , 1912; for correct 

 spelling of generic name see Liihe, Centralbl. Bakt. Parasit., vol. 27. p. 209, 

 1900. 



Specimens from Mola mola. — Three sunfishes have been exammed 

 for Entozoa since the last report was made. The first and third of 

 these came from a trap at Menemsha Bight, the second from a trap 

 at Buzzards Bay, near Woods Hole. Each had been kept alive in the 

 Bm:"eau of Fisheries pool for about a week. Cestodes of this species 

 found as follows: 



September 23, 1923: 7 strobilae, young and adult, and a few frag- 

 ments from intestme. Straightened in 70 percent alcohol the strobilae 

 relaxed and became longer than they had been in sea water. The 

 two largest measured: Lengths 725 and 650 mm., breadths 8 and 9 

 mm. (U.S.N.M. No. 8903). 



July 19, 1926: 9 from anterior end of almientary canal; maximum 

 length 350 mm., minimum 30 mm.; all immature. 



July 13, 1927: 28 slender, miniature, most of them in a tangled 

 mass. 



ANCISTROCEPHALUS ALUTERAE (Linton) 



Plate 62, Figures 20-22 



Dlhothrium aluterae Linton, Rep. U. S. Fish Coram, for 1886, pp. 458-459, pi. 

 1, figs. 5-8, 1889; Bull. U. S. Fish Coram., vol. 19, p. 464, 1901.— Stile3 

 and Hassall, Hyg. Lab, U. S. Public Health Serv. Bull. 85, p. 196, 1912. 



Specimens from Ceratacanthus schoepfi. — Five strobilae collected 

 July 28, 1920, from intestine of one fish examined; maximum length 

 115 mm. These strobilae appeared to be im^mature, but transverse 

 sections, 200 or more, contained sections of three ova, the largest 

 of which measured 0.072 by 0.042 mm. The testes in these sections 

 are conspicuous, 0.06 to 0.09 mm. in greatest diameter, with developed 

 sperm. The aperture of the cirrus and vagina is marginal (U.S.N.M. 

 No. 8904). 



Larval stage (pi. 62, fig. 22): Plerocerci (U.S.N.M. No. 8905), 

 presumably of this species, are of frequent occurrence in the filefish, 

 encysted, sometimes free, usually in enormous numbers, especially 

 in the walls of the stomach and intestine, but also often in the muscular 

 tissue in all parts of the body, in the kidneys and on the viscera 

 generally, in the pericardial cavity, and on the outside of the ventricle. 



Thirteen fJefishes were examined on four dates in July, eight in 

 August, and one in September in 11 different years. To these may be 

 added the intestine of a filefish containing numerous encysted plero- 

 cerci that was brought to my laboratory by Dr. E. B. Krumbhaar on 

 August 17, 1929. 



Following are a few extracts from notes made at the time of col- 

 lecting Entozoa from the filefish : 



