66 PROCEEDINGS OP THE NATIONAL MUSEUM. vol.64. 



Raja eglanteria. 



Collected in six of the years from 1905 to 1916, inclusive : On one 

 date in May, 3 and a few free proglottides; on one date in June, 2 • 

 strobiles, length 36 mm., 1 ripe proglottis: on one date in July, 8; 

 on two dates in August, 1 to 2, and a few free proglottides in each 

 of 4 skates ; on one date in September, 2, with free proglottides. 



Raja erinacea. 



April : 1 from each of two skates, two dates in different years ; ripe 

 proglottides. 



May : 1 on one date and 2 on another, in different years ; ripe pro- 

 glottides. 



July: 1 to 5, in 5 skates, on four dates in three different years; 

 ripe proglottides in some. 



1903, August 21 : 4. 



1904, August 29 : 1 with scolex, and fragments of 2 others. 

 October: 1 to 26 in 11 skates, on 11 dates in 6 different years; 



free, ripe proglottides on most of the dates; maximum length noted 

 60 mm. 



November: 5 to 21 in 8 skates, on 8 dates in 4 different years; 

 many ripe segments. 



(U.S.N.M., Helm. Coll. 7703.) 



Raja stdbuliforis. 



April: 1 to 21, 10 skates on 5 dates, 2 different years; ripe pro- 

 glottides on 1 date. 



May : 1 to 8, in 15 skates, 15 dates, 8 different years. 



June : 1 and 2, in 2 skates, in different years ; ripe proglottides in 

 each. 



1912, July 30 : 24, with many ripe proglottides, ivory Avhite, very 

 active. Some of the larger proglottides collapsed soon after they 

 were placed in sea water, leaving a white mass of ova on the bottom 

 of the dish. 



August: 4 and 20, in 2 skates, different years: maximum length 

 in sea water, 100 mm. 



September: 3 and 4, in 2 skates, different years, maximum, 52 

 mm., ripe proglottides in one. 



October: 1 to 15, in 18 skates, on 15 dates. 7 different years; ripe 

 segments on 8 dates. 



November: 3. with ripe proglottides, from 1 skate on each of 

 two dates, same year ; 3 skates examined on each date. 



Squalus acanthias. 



Collected in 7 of the years from 1903 to 1914: Strobiles with 

 mature segments, and free proglottides found only on the dates in 

 May. On 2 dates in May, 4 to 7, adult strobiles and free proglottides; 



