PLEUROBRANCH^A. 227 



long and 4 in diameter, with the eggs in several rows. The species 

 is not common below 200 fathoms. (Verrill). 



Closely resembles Pleurobranchcea Novce Zealandice in form and 

 color. The latter is a littoral species. 



Pleurobranchcea tarda V., Amer. Journ. Sci., (3), xx, p. 398, 392 

 (Nov., 1880) ; Proc. U. S. Nat. Mus., iii, p. 384 (Dec. 21, 1880) ; 

 Trans. Conn. Acad., v, p. 546, pi. 58, f. 26 ; U. S. Commission of 

 Fish and Fisheries, pt. xi, Rep. of Commissioner for 1883, appendix 

 D, p. 571 [69], pi. 28, f. 105. 



The figure represents the dorsal aspect, two-thirds natural size, 

 genitalia protruding. 



P. MACULATA Quoy & Gaimard. PI. 53, figs. 88, 89. 



Body thick, a little swollen above, covered with low wrinkles. 

 Color dirty white, with light brown spots; sole yellowish ; foot wide, 

 rounded at the two ends, and projecting beyond the mantle behind. 

 Veil continuous with mantle, wide, arcuate, crenulated and terminat- 

 ing in two points ; surmounted behind by the two short, auriform 

 tentacles. Gill fusiform, free at the end, formed of parallel and 

 oblique foliations, generally uncovered. Penis almost always pro- 

 jecting, large and 4 or 5 lines long. Anus opens above and past the 

 middle of the gill. Mouth at the end of a small rostrum. 



Port Western, Jervis Bay, and all this southern part of Australia, 

 in 9-10 fms. 



Pleurobranchidium maculatum Q. & G., Zool. Astrolabe, ii, p. 301, 

 pi. 22, f. 11-14. 



P. NOV^EZEALANDI^: Cheeseman. PL 53, fig. 87. 



Body oval, convex, thick and fleshy, smooth and lubricous to the 

 touch, but the whole surface nevertheless covered with minute 

 puckers and folds. Color light-grey, copiously streaked with irre- 

 gular anastomosing lines of dark greyish-brown, and sprinkled with 

 numerous minute and almost microscopic white dots. Mantle 

 smooth, not nearly so long as the foot, and not concealing the bran- 

 chiae, rather broader on the right side ; oral veil broad, extending 

 over and concealing the mouth, in front semicircular, and with a 

 delicate fringed margin ; but at each side produced into a short ten- 

 tacle-like lobe ; mouth large, round, in a state of rest concealed in 

 the sulcus between the oral veil and the foot, but capable of being 

 greatly protruded in a proboscidiform manner ; buccal plates two, 

 large, finely and regularly reticulated or faceted ; odontophore broad, 

 with numerous rows of similar unciform teeth ; tentacles dorsal, wide 



