446 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



ascribed According to the older valuation of the lobes the present 

 individual would, therefore, probably be counted as the type of a new 

 genus. However, the animal is a very typical Halocyntliia in all 

 other respects, so I have no hesitation in placing it here. 



Within the genus it belongs among the species with six branchial 

 folds, its nearest of kin seeming to be H. micliaelseni Oka, 1906, and 

 H. Jcarasvoja Oka. But from both of these it differs in several ways 

 in addition to its larger number of atrial lobes. For example, 

 michaelseni has about 10 vessels to the fold and 9 between, while the 

 hypophysis mouth is described by Oka as presenting a "komplizier- 

 tes Muster." A very simple U -shape characterizes the organ in 

 washingtonia. Furthermore, in the Japanese species the "liver" does 

 not seem to be separated into the two distinct portions as is the 

 case in washingtonia. In fact, this condition of the organ is rare for 

 the genus. 



Type-locality . — A single specimen. Albatross station 3450, lat. 48° 

 26' 50" N.; long. 124° 39' 35" W. (m the Strait of Juan de Fuca), 

 151 fathoms, bottom g., August 28, 1891. 



Type.~C&t. No. 5680, U.S.N.M. 



HALOCYNTHIA HAUSTOR (Stimpson). 



Cynthia haustor Stimpson, 1864, p. 159. — von Drasche, 1884, p. 372, pi. 3, figs. 3 

 and 8.— Herdman, 1898, p. 257, pi. 14, figs. 1, 2.— Ritter, 1900, p. 601, pi. 18, 

 figs. 8, 9, 10. 



Pyura haustor Haktmeyer, 1909a, p. 1340. — Huntsman, 1911, p. 134. 



There are a dozen and a half of this common Puget Sound species 

 sent to the museum by Dr. O. B. Johnson in 1889. They were col- 

 lected from shore rocks between tides and show nothing needing 

 comment. 



Puget Sound, Dr. C. B. Kennerly, Northwestern Boundary Survey, 

 25 specimens, cotypes. 



The assignment to this species of two small specimens from Alba- 

 tross station 3451 is open to some though but little doubt. Perhaps 

 the most questionable point is the almost entire absence of siphons 

 in these specimens, these structures being usually though not always 

 particularly prominent m the typical haustor. The ridging and 

 tuberculation of the test of the individuals now under consideration 

 are furthermore somewhat less definitely expressed than in haustor 

 from the littoral zone. The available evidence from mternal struc- 

 ture contains nothing against the ident^iication excepting possibly 

 the tentacle number, which is here 30, somewhat high for haustor. 

 What makes the assignment of these specimens particularly inter- 

 esting is the fact that they were taken in much deeper water, 106 

 fathoms, than haustor generally inhabits. 



Albatross 3451, lat. 48° 25' 10" N.; long. 124° 37' 50" W., in the 

 Strait of Juan de Fuca, 106 fathoms, August 28, 1891, 



Type.— Csit. No. 3239, U.S.N.M, 



