114 Transactions OF the Canadian Institute. [vol. ix 



land Straits. Phallusia ceratodes grows in large beds in the bay south of 

 Brandon Rocks and also in a sponge bed near the entrance to the bay. 

 Elsewhere only occasional specimens were obtained. 



Chelyosomatidae. Chelyosoma productum is occasional at low tide 

 and abundant in deeper water. C. columbianum was found in from lo 

 to 20 fathoms but was not abundant. Corella inflata was growing in 

 numbers near low water mark and C. rugosa in deeper water. 



Caesiridae. Caesira apoploa and C. cooperi were dredged in sand 

 in about lo fathoms in front of the station. 



Styelidae. Katatropa vancouverensis and Cnemidocarpa joannae 

 were abundant at low tide and the latter occurred frequently in deeper 

 water. Goniocarpa coccodes was dredged in small numbers from stony 

 and shelly bottoms and with it was found Styela gibbsii. The latter 

 was very abundant in many places in from 5 to 15 fathoms, sand. 



Tethyidae. Boltenia villosa was growing in quantity at low tide and 

 was abundant in the dredgings. Pyura haustor was found in large masses 

 in from 5 to 20 fathoms, sand and occasionally elsewhere. Boltenia 

 echinata, Tethyum aurantium and T. igaboja were obtained only very 

 rarely and in from 10 to 25 fathoms, stones and shells. 



The list for this station is as follows: — 

 (l) in quantity. (2) occasional. 



Amaroucium sp. A, Trididemnuni sp. A, 



Ascidiopsis columbiana, Ciona intestinalis, 



Phallusia ceratodes, Ascidiopsis nanaimoensis, 



Chelyosoma productum, A. paratropa, 



Corella inflata, Chelyosoma columbianum, 



C. rugosa, Caesira apoploa, 



Katatropa vancouverensis, C. cooperi, 



Cnemidocarpa joannae, Goniocarpa coccodes, 



Styela gibbsii, Boltenia echinata, 



Boltenia villosa, Tethyum aurantium, 



Pyura haustor. T. igaboja. 



The completion of the railway from Nanaimo to Alberni will make 

 it possible to reach the outer coast of the Island in a short time by means 

 of the railway and the Alberni Canal. This is of importance, as the fauna 

 of the outer coast appears to differ markedly from that of the inner coast. 

 The following account is based on collections made at Ucluelet on Bark- 

 ley Sound near the mouth of the Alberni Canal by Prof. Macoun and his 

 assistants in 1909 and by myself at the same point at the end of July 

 and the beginning of August of the same year. 



The rocks at low tide on the exposed coast are rich in Ascidians, 

 especially the compound forms. The following were found : — 



