16 PKOCEEDINGS OF THE NATIONAL MUSEUM vol.70 



filiform, the longest about 45 mm. The segments, as a rule, are much 

 broader than long with a tendency to lengthen towards the middle of 

 the strobile, where the length may become greater than the breadth. 

 The segments are more or less wedge-shape, and are traversed by 

 a deep and apparently permanent groove. The genital pores are situ- 

 ated a little in front of the margin. The cirrus appears to be a little 

 longer than it is in the other species of this genus noted in this 

 paper. The diameter of the cirrus-pouch, in transverse sections of 

 the strobile 0.041, in frontal sections 0.065, in sagittal sections 0.051. 

 The number of testes appears to be about 20. The vagina, opening 

 into the genital cloaca near the cirrus, lies in a gentle curve on the 

 ventral side of the cirrus-pouch and vas deferens. The vitelline 

 gland is slightly, and the ovary strongly, lobed. The uterus in ripe 

 proglottides fills the greater part of the medullary space ; immature 

 ova were seen which were oval-elliptical, and 0.04 mm. in the longer 

 diameter. 



The walls of the excretory vessels are thick, and there is a trans- 

 verse vessel at the posterior end of the proglottides connecting the 

 ventral vessels. 



The bundles of the inner layer of longitudinal muscles are ellip- 

 tical in section, and are made up of a maximum of about 25 fibers. 

 The outer bundles contain from 3 to 5 fibers each. 



A specimen mounted in balsam has the following dimensions : 

 Length, 45 mm.; breadth of scolex, 0.34, length, 0.35; breadth of 

 bothrium, 0.14, length, 0.33; breadth of neck, 0.21; distance to first 

 distinct segment, 1.12; length of first segment, 0.03, breadth, 0.14; 

 length of segment at middle of strobile 0.07, breadth 0.24; jDOsterior 

 segment, length 0.14, breadth 0.34. The greatest breadtli was 0.56, 

 length of segments at that point 0.08. The longest segment was 0.28, 

 its breadth, anterior 0.14, posterior 0.28. 



RECORD or COLLECTION 



Fregata magniflcens : 



1907, July 8. — A number of small cestodes were given me on 

 this date by Dr. John W. Watson, which he had collected a 

 few days before at Bird Key, Tortugas, Florida, from a 

 man-of-war bird. 



(U.S.N.M., Helm. Coll. 7864 (type).) 



OPHRYOCOTYLE PROTEUS (Fries) 

 Figures 40-44 



Scolex. — Short and broad; the so-called rostellum is a broad, 

 terminal sucker with strong, muscular walls, and with a scalloped 

 border which is armed with very numerous, minute spines. These 



