FAUNA OF THE OUTER WESTERN AREA OF THE CHANNEL. 381 



The colony is 67 cm. in maximum breadth, 51 cm. in length, and 1'3 cm. 

 in thickness. To Herdman's description I further add that the 

 meshes contain, counted from the endostyle, ca. 8, ca. 5, ca. 4, 

 ca. 6 stigmata, and the stomach possesses a prominent caecum bent 

 into a hook shape. 



EHODOSOMATIDAE [COEELLIDAE]. 

 Corella parallelogramma (Miiller). 



At Positions 3 (one), 10 (one), 60 (one). 

 Depth, 40-49 fath. 



Corella larvaeformis, Hancock. 

 At Positions 32 (one), 38 (one). 

 Depth, 42-44 fath. 



PHALLUSIIDAE [ASCIDIIDAE]. 

 Ascidiella aspersa (Miiller). 



At Positions 1 (three, including a smooth example of the type 

 virginea, of which, however, the course of the gut conforms 

 with that of the type aspersa), 3 (seven), 4 (eight), 5 (one), 

 7 (one), 10 (one), 32 (three), 33 (three), 34 (two), 40 (one), 

 42 (one), 70 (in great abundance in and upon Pecten shells, or 

 massed together), 72 (one young). 

 Depth, 40-44 fath. 



Phallusia [Ascidia] virginea, Miiller. 



At Positions 1 (one), 3 (one), 8 (one), 12 (one), 15 (one), 34 (one), 38 



(one), 40 (one), 43 (one), 59 (two), 60 (one), 67 (one), 70 (two), 



72 (three), vii (one). 

 Depth, 40-52 fath. or over. 



Phallusia [Ascidia] mentula (Miiller). 



At Positions 3 (two), 4 (three), 8 (two), 12 (one), 34 (one young), 40 



(one), 59 (one). 

 Depth, 40-49 fath. 



Phallusia [Ascidia] conchilega (Miiller). 



At Positions 1 (one), 4 (one), 8 (one), 10 (three), 32 (one), 34 (two), 

 36 (one), 37 (two young), 43 (four), 49 (one), 70 (one), vii (two). 



Depth, 40-49 fath. or over. 



I refer the species dejjrcssa to the older specific name conchilega. 

 Among the material two examples occur which in some characters, 

 especially in the course of the alimentary canal, differ from the 

 typical specimens. That from Position vii (Fig. 2) measured on the body 



