1906.] ASCIDIAXS OF CAPK VKRDE ISLAND. 905 



He has observed from about 30 to 50 and of different sizes. The 

 dorsal tubercle (fig. 9) is elevated and horseshoe-shaped. The 

 liorns are simple and only slightly intumed. The gonad of 

 the left side of the body is larger than that of the right. The 

 ovary is a sinuous coil of pale colour ; the testes are numerous 

 and club-shaped. 



Family Ascidiid^ Herdm. 1880. 



AsciDiA OBLiQUA xVlder. (Plate LXIV. figs. 10 &, 1.1.) 



External appearance. — The shape is oval, the anterior end 

 being rather narrower than the posterior rounded surface. The 

 body is somewhat compressed laterally and is attached by the 

 posterior half of the left side. A terminal Vjranchial aperture 

 with 8 lobes and an atrial opening with 6 lobes ai-e both present 

 on the dorsal edge. The general colour is light grey. 



dimensions of specimens measui'ed : — 



1. 2. 3. 



Length 3'2 cm. 2-9 cm. 2*5 cm. 



Breadth 1*4 cm. 1*6 cm. 1-4 cm. 



The test is gelatinous and translucent. A marked U-shaped 

 fold is very characteristic of the right side (fig. 10). 



The branchial sfic has no longitudinal folds, is very tough and 

 not easily torn. Narrow transverse vessels are present. 



The stigriiata are straight and number from 4 to 6 in a mesh. 

 Meshes are numerous. There are finger-shaped lobes at the 

 branchial and atrial openings. 



The dorsal tubercle is curved, with inturned horns. 



The tentacles are very numerous, long and filamentous. 



In this species the outline of the mantle shows conspicuously 

 through the test. The stomacli is longitudinally ribbed (fig. 11). 

 The genitalia lie in regular rows round the outer curve of the 

 intestine (fig. 11.) 



Family Clavelixice Forbes, 1853. 



EcTEiNASciDiA TUREixATA Herdm. (Plate LXV. fig. 12.) 



The description in the ' Challenger ' account applies to the 

 .specimens of this species. 



Measiu-ements of specimens : — 



1. 2. 3. 



Length 12 cm. 2-2 cm. 2-8cm. 



Breadth of anterior end ... 0-5 cm. 0*9 cm. 1-0 cm. 



The branchial sac occupies most of the space within the test, is 

 not folded, and possesses distinct longitudinal bars. Papillae are 

 not pi-esent on the longitudinal bai-s, but there are numerous 

 lappets projectiug inside the sac. 



60* 



