166 



EXPEDITION TO POINT HARROW. ALASKA. 



2. SERTULARELLA TRICUSPIDATA Hiiicks. 





Citations. 





!<liv' ,.',T, Hindi* liritiih llvilroicl /oo|ihvls. p. I 1 :)'!. pl.-!7, fig. 1. 



SrrtultrtUa trinn-i '!,- Dentaobo NoidpoUrf.. ii, ]>. 41(i. 



(Noio. C&C Manual, p. 190. 



K.-.v oi 1 KxpL of Alaska, i, p. 20. 



ISf* 

 1874 



JeriulareUa trieuipidata . 



'tularella trieiuphlata. S. F.flaik 



This was dredged in very great abundance off Point Franklin, iu 13J fathoms. 



It has been recorded from the Aleutian Islands and the Shumagins, and also from Greenland. 



3. THUIARIA CYLINDRICA S. F. Clark. 



Several specimens of a Tlnnuria were dredged off Point Frankliii in i;>J fathoms, whir.-h I 

 refer with some doubt to this species. 



It differs from Clark's types in the National Museum in having the longitudinal rows of hydro- 

 thecai less obvious, and the apertures of the hydrothecie directed alternately in opposite directions. 



This species was originally described from the eastern shores of Bering Sea. 



4. TUBULARIA sp. 



A good-sized species of Tubular ia, closely resembling T. indivisa, but apparently having more 

 numerous oral tentacles, and of a bright crimson color, both stem and head, was quite abundant 

 on the patches of mud and sand mixed, close to the station, in 2J to .5 fathoms of water. 



TUNIGATA. 



ASCIDIACEA. 

 ASCIDLE SIMPL1CES. 



1. ? BOLTENIA sp. 



Several large Boltenias, in form closely resembling the ordinary U. boltcni of the Atlantic coast, 

 were found washed up on the beach October 13, 1881, after a heavy westerly gale. They were a 

 brilliant red in color. 



Tlie same (?) species was also dragged up by the cod-lines in about IS or 20 fathoms of water 

 off tlie mouth of Plover Bay, Eastern Siberia. 



2. ? MOLGULA sp. 



A small round Ascidian. always covered with sand, and probably a species of Molyula, was 

 dredged in considerable imnibers on the patches of mud and sand mixed, in about 2i fathoms, close 

 to the station. 



3. HALOCYNTHIA PYRIFORMIS (Rathke) Verr. 



A single rather small specimen of this species was picked up on the beach near the station. 

 Mr. Dall found it of large size and brilliant coloring at Plover Bay, Eastern .Siberia, and at Pctro- 

 paulovsk, Kamtschatka. 



