PARASITES OF FISHES OF THE AVOODS HOLE REGION. 455 



l)illu■ll^;iolls of spi'dnien sketflieil (fig. ooo), life, in niillimetei-s: Loiifxth, 1.46; diainetcr, anU'rior 

 0.1, iiiiiliUe 0.27, of oral surker 0.07, of ventral sni-ker 0.07; ova, 0.075 and 0.05S in the two prineipal 

 diameters. 8ee also lij.'s. 841-346, 352, 354. 



ruoT()Zo.\. 

 VJ. !<iiiiriiiiixl 



From liver: White, >;lolmlar, 1..") mm. in diameter. When eoiiipres.sed it lilierated immense 

 numbers of s|)ores. which were in large part aggregated into globular or oblong clusters, the larger 

 as niueh as 0.02 mm. in diameter. The spores were sliort and thick, with Ijluntlj- rounded ends; 

 length about 0.0025 mm., and a little less than that in breadth and thickness. Collected September 

 1, 1900. Spe.'imen given to Dr. H. II. Cushing. 



Roccus liueatus, Striiinl /'(«.■). 



The stomachs of all the sjiecimens which 1 have examined have been empty. .\ few fi;«li scales 

 have been noted in the intestine. 



,\l'.\NTnO('KI'H M..\. 



1. Eriiiiiorliiincliii.'! proleusVfestnuwh. I . pp. 4SI6— iil7, pi. vi, figs. 3-5. 'i, pp. 537-53S, jil. i.xviu, 



figs. 8-5-,S8. .Tnly 14, 1900; 2 fish examined, 20 in one, (i in the other. Two obtained from 

 another July 21. 

 This parasite is apjjarently with rare exceptions always present in the rectum of the striped l)a.ss. 

 Usually the head of the worm perforates the intestinal wall and is often surroun<led by a waxy 

 secretion, whi<'h is covere<l by the serous coat. 



2. Erhiiiorliiini-Iius <ini.i Rudolphi. I. pp. 492-493, pi. v, figs. 7-13. 3, p]i. 52.5-.52S, pi. i.iii, figs. 1-11, 



ami pi. i,\, figs. 89, 90. 



NEMATODES. 



8. Aaciirix s\>. Immature. 



In a striped bass examined August 18, 18S7, numerous small capsules were found between the 

 uiucous and submut'ous la^-ers of the stomach. These were more or less elongated, some even vermiform, 

 and were dark-lirown on account of the waxy, degenerate tissue with which they were surrounded. 

 The.se capsules contained nematodes. The head of the one examined was truncate, with indistinct 

 papilhi?. The tail tapers to a smooth, round point, somewhat elongate behind the anal aperture. 

 The body is crossed by exceedingly fine strife. The oesophagus is long, witli a csecal appendage at its 

 base. These forms resemble those from the squeteague. [Figs. 107-109.] 



4. Filiirid riihra Leidy. 



From flesh. Collected liy 8. E. :Meek, Fulton JIarket, New York, .\ugust 12, 1886, who says that 

 the worm wa-s red when living. The specimen is a fragment, the posterior end of a long worm; linear, 

 slightly roughened by transverse wrinkles; length, 60 mm.; diameter, about 1 mm. 



5. Lmmocpph<ilus antiulatus 'Violin. [PI. xix, figs. 220-223.] 



One .specimen, a male, from peritoneum, August 3, 1889. The specimen was in poor condition 

 and l)ut little more than the external characters could be made out. Some of the dimensions in 

 millimeters are given: Length, 8; diameter of head O.lfl, 1 mm. back of head 0.46, maximum (about 

 middle) 0.61; length of copulatory spines, about 0.11; distance between the transverse dentigerons- 

 rows, about middle of body, 0.03. 



CESTonES. 



6. l!liiiiir]iiiliiillii-iiiiii s/iiriijsiiiii Linton. See 4, pp. ,S01-,8()5, pi. i.iv, figs, l.'i, 14, and pi. i..xv, figs. 1-7. 



July 21, 19IMI. Klnngatcd cyst on viscera. 



TREM.VTODES. 



7. DiMomum lornaliim Rudolphi. Intestine. [D. rufoririilr Kmlolphi.] <», pp. 51.5-517, pi. xi.ii. fig. 



14, and pi. xliii, figs. 1-4. 

 These specimens were wrongly identified. They should lie referreil to 1>. tunmtuin. 



8. Di.itiimumtenne lAnXon. 6, pp. 53.5-.536, ]il. i.ii, figs. 2-8. 



