204 



UNITED STATES NATIONAL MUSEUM BULLETIN 251 



of three groups of rather elongated hepatic lobules. Anus margined 

 plainly. Each gonad with 12-13 genital capsules, each capsule con- 

 tains one or two eggs, one to three testicular follicles, and bears a 

 minute endocarp on surface. 



Remarks. — Although the remarkable smallness of the second 

 branchial fold seems to be unique for the present specimen, it very 

 likely belongs to Pyura vittata and has attained maturity despite 

 such a small body size. 



106. Pyura pachydermatina (Herdman) 



Figure 91 



Boltenia pachydermatina Herdman, 1S81, p. 81.— Herdman, 1882, p. 87, pi. 7, figs. 



6-8.— von Drasche, 1884, p. 370.— Herdman, 1890, p. 16, pi. Cyn. 1. 

 Cynthia lutea Sluiter, 1900, p. 26, pi. 4, fig. 3 ; pi. 5, figs. 1-3. 

 Pyura pachydermatina Michaelsen, 1922, p. 389. — Brewin, 1946, p. 125, fig. 19 ; 



pi. 4, fig. 12d.— Brewin, 1950, p. 345.— Brewin, 1952, p. 192.— Kott, 1952, p. 



262.— Brewin, 1958, p. 440. 



New Zealand 

 E. Kerschner, coll., January 1875. 



MATERIAL EXAMINED 



Port Chalmers. U.S. Navy Transit of Venus Expedition, Dr. 

 One specimen (USNM 2676). 



Description. — A single large stalked specimen from New Zealand 

 was examined. Body elliptical, 62 mm. long and 25 mm. high. 

 Peduncle 225 mm. long, 6 mm. in diameter, issues from anterior end 

 of body ; its surface irregularly creased, yellowish brown, covered with 



Figure 91. — Pyura pachydermatina (Herdman): a, right side of specimen; b, left half of 

 mantle body, inner side; c, right half of same; d, ciliated groove. 



