ABT. 12. A NEW CESTODE FROM SHARKS LINTON. 9 



June 2, 1916; 2 larval cestocles, much contracted; no food notes. 



Since these specimens of Phyllohothriurii loliginis from the spiny 

 dog-fish were all immature, and were, with very few exceptions, in 

 the stomach, where they had evidently been recently introduced with 

 the food, Squalus acanthias can not be regarded as a final host of 

 this species. 



Summary. — Spiny dog-fish were examined on many occasions 

 when no specimens of Phyllohothrium loliginis were found. Thus, 

 summarizing by months, the following examinations of spiny dog- 

 fish were made in which this larval cestode was not found : One 

 date in April, 2 fish examined; seventeen dates in May, 112 fisli ex- 

 amined ; four dates in June, 6 fish examined ; two dates in July, 9 

 fish examined ; 7 dates in August, 1 fish examined ; four dates in 

 September, 56 fish examined; seven dates in October, 267 fish ex- 

 amined ; eight dates in November, 121 fish examined. 



To this may be added a summary by months of examinations of 

 spiny dog-fish when examples of P. lolighiis were found : Eight 

 dates in May, 114 fish examined, 68 larval cestocles recorded; two 

 dates in June, 101 fish examined, 86 larval cestodes recorded; one 

 date in July, 16 fish examined, 2 cestodes recorded; one date in 

 September, 26 fish examined, 2 larval cestodes recorded. 



Squid were recorded in the food on one date in April, six in May, 

 two in July, three in August, two in September, two in October, and 

 one in November, not including dates on which P. loliginis was found, 

 5. Raja oceUata. 



Practically all of the collections from the winter skate here re- 

 corded were made by Vinal N. Edwards. 



May 12, 1904; 15; stomachs contained razor clams and cralis; 16 

 larval cestodes from 2 fish. 



Ma,y 17, 1904 ; 1 ; 6 larval cestodes. 



May 17, 1905 ; 7 ; stomachs filled with " mollusk and squid " ; 4 

 larval cestodes, length of largest 6.5 mm., breadth 2 mm. 



May 10, 1906 ; 10 ; stomachs filled with crabs ; 2 larval cestodes. 



May 14, 1906; 7; stomachs contained squid; 1 larval cestode. 



May 11, 1908; 6; 27 larval cestodes, length 16 mm., more or less. 



June 3, 1909; 1; 11 larval cestodes. 



May 13, 1911; 6; stomachs full of squid; 18 larval cestodes from 

 2 fish. 



May 15, 1914; 35; squid in stomachs; 13 larval cestodes from 9 

 fish. 



May 18, 1914; 10; squid in stomach; 5 larval cestodes, 2 with 

 scoleces invaginated. 



June 6, 1914; 2; squid in stomachs; 1 larval cestode. 



Summmnj. — Phyllohothrium loliginis was found in Baja oceUata 

 on nine dates in May, 97 fish examined, 92 larval cestodes; on two 

 dates in June, 3 fish examined, 12 larval cestodes. 



