ART. i:i. A NEW CESTODE FROM SHARKS — LINTON. 7 



in the subcutaneous fat of a porpoise, where they occurred in large 

 numbers in the form of cysts, yellow in color, and one centimeter in 

 diameter, and which were recognized by the son as representing the 

 larval stage of a Phyllobothrium. Van Beneden's figure of the scolex 

 of P. delphini bears a very close resemblance to the larval Phyl- 

 lobothria from the squid of the New England coast. 



Following is a list, with brief notes, of hosts in which I have 

 found larval Phyllobothria, which have usually been recorded in my 

 notes as Pliyllobotlwium loliginis. 



1. Ommastrephes illecebrosus.* 



2. Loligo pealii. 



July 28, 1904; food, small menhaden; 1, and 2 fragments. 



July 29, 1904; 2, and 2 fragments. 



August 8, 1904 ; 1 ; length 20 mm. in sea water, 40 mm. after lying 

 for a short time in fresh water. 



August 8, 1906; food, fragments of fish; 1, from stomach; length 

 20 mm., shrunk to about half this length when placed in alcohol. 



July 6, 1912; a few found in stomach, 20 mm., more or less, in 

 length ; a smaller larval cestode, Scolex polyinor^phus^ also noted. 



July 8, 1913 ; 8, in stomach. 



3. Mustelus canis. 



June 6, 1904; 5 dog-fish examined by Vinal N. Edwards; food, 

 squid, lobster, and sand crabs ; 3 larval cestodes found. 



July 9, 1904 ; 1 cestode from stomach ; active, varying from 15 to 

 25 mm. in length ; neck pink or flesh color, body ivory white, bothria 

 crumpled on edges, lateral vessels sinuous and plainly showing in 

 the neck; agr^e^ exactly with published descriptions of PhyUohoth- 

 rium loliginis. This specimen was given me by Dr. W. C. Curtis, 

 who reported that he had been finding squid in the stomachs of dog- 

 fish which he had been opening, but had not made any note of the 

 stomach contents of the host from which he had collected this worm. 



July 25, 1904; 3 dog-fish examined, 1 larval cestode found. 



July 30, 1904; 2 dog-fish examined; food, menhaden; 3 larval ces- 

 todes, longest 34 mm. 



May 16, 1905 ; 1 examined ; stomach contained squid ; 1 larval ces- 

 tode found. 



May 23, 1905; 10 examined; stomachs contained squid, alewife, 

 and crabs; 1 larval cestode found in one of the dog-fish, and 4 in 

 another. 



May 31, 1912 ; 4 examined ; 6 larval cestodes found. 



The examinations reported under the three dates in May were 

 made by Mr. Vinal N. Edwards. Dog-fish examined by Mr. Edwards 



* See Proc. U. S. Nat. Mus., vol. 19, p. 792, pi. 52, flgs. 1-9. 

 20107— 22— Proc. N. M. vol. 61 13 



