REPORT ON THE TUNICATA. Ill 



Genitalia.— There arc three genital glands on each side adhering to the inner 

 surface of the mantle They arc of an elongated pyriform shape, and have moderately 

 long ducts attached to them (PI. XI. fig. 7, </.). 



The three on the left .side lie in the intestinal loop and close to the ventral side of the 

 rectum or terminal part, They arc placed with their long axes dorso-ventrally and are 

 in a row, one being anterior, one posterior, and one in the middle. The posterior one is 

 in a line with the anus towards which the ducts of all three converge. The duct of the 

 anterior gland is about three times as long as that of the posterior one, while the middle 

 one has a duct of intermediate length. 



The three glands on the right side are more closely placed than those on the left. 

 They lie on the inner surface of the mantle about half-way between the atrial aperture and 

 the stomach, with their ducts directed towards the atrial aperture and their sides touching. 

 The ducts of all three are of much the same length. 



Each gland is a pyriform mass containing ova and spermaria, and the duct is double, 

 consisting of a shorter and wider oviduct, and a longer and narrower vas deferens which 

 runs alongside the oviduct but projects beyond it. 



There are eight specimens of this species. They were all taken in the Southern 

 Ocean, about half-way between the Cape of Good Hope and Kerguelen Island. 



Station 14G. December 29, 1873. Lat. 46° 46' S., long. 45° 31' R; depth, 1375 

 fathoms ; bottom temperature l 0- 5 C; globigerina ooze. 



Culeolus perlucidus, Herdman (PL XL figs. 10-14, and PI. XII. figs. 8-12). 



Ouleolus ji'ii '/(<•/( /«.-,-, Herdman, Preliminary Report, Proc. Roy. Soe. Edin., 1880-81, p. 86. 



External Appearance. — In this species the body and stalk have much the same 

 proportions as in Culeolus recumbens. The shape of the body is somewhat ovate or 

 pyriform, gracefully curved, and scarcely compressed laterally (PI. XL fig. 10). The 

 anterior end, where the body becomes continuous with the stalk, is produced and 

 tapering, while the posterior end is rounded and broader, though it is by no means the 

 widest part of the body. The dorsal edge is slightly convex forming a gentle curve, 

 but the ventral is extremely convex, especially at the anterior end, where it rises from 

 the narrow extremity in a bold curve, which attains its greatest height at about one- 

 third of the way to the posterior end. The two sides are equally convex. 



The peduncle is long and thin, flexible, but stiffer than that of Culeolus recumbens. 

 It is perfectly transparent and looks like a delicate glass spine. It is attached to the 

 anterior end of the body, at some distance from the branchial aperture, ami is bent at 

 a right angle at tin; point of attachment, so that it runs ventrally and describes a gentle 

 curve towards the posterior end. From the anterior end it is continued, attached to the 

 test, along the dorsal edge fully half-way to the branchial aperture (PL XI. fig. 10). 



