from Brlllsli Golamhia and Aliska. 73 



are short and only in a few cases opposite one another; tliey 

 are not club-shaped : there are about thirty-two on each side 

 of the radial canals. The four groups of filamentous gonads 

 hajig from the proximal ends of the radial canals, reacliing 

 to the level of tlic velum. There are eight gonads in each 

 group, the central one being the longest. 



Found in Puget Sound. 



This species differs from Agassiz's P. peniclUata in the 

 lack of lateral diverticula on the ends of the radial canals 

 next the circular canal, the larger number of tentacles, and 

 the length of the gonads. 



Turris breviconisj sp. n. 



The bell is 4*5 centim. high, 3'5 centim. broad, tlie general 

 shape of the bell being somewhat cubical. 'I'he velum is well 

 developed and strong. On the greater part of the bell-margin 

 there appear to be two rows of tentacles, arranged zigzag. 

 There are about one hundred and forty coiled tentacles, whose 

 proximal ends s))read out rider-shaped, clasping the margin 

 of the bell instead of being fastened to it by means of tentacle- 

 bulbs. Hteckel has described a similar arrangement in the ten-' 

 tacles of Tiara pileata. The walls of the stomach are much 

 folded and evaginated into interradial pouches, looking like 

 opposite diverticula of the upper part of the radial canals or 

 stomach. There are five pairs of these diverticula bearing the 

 gonads suspended from double mesenteries. Tiie proboscis is 

 not well developed. The four large mouth-lubes are scalloped 

 and finely fringed, perradial in position. The gonads and 

 the stomach occupy less than the upper half of the bell- 

 cavity. The radial canals are lancet- or spindle-shaped in 

 outline, bearing unbranched but well-marked lateral diver- 

 ticula throughout their whole lengtli. Bell proljiibly bluish 

 or violet ; stomach, tentacles, and gonads dark red or purplish. 



Found at St. Paul Island (Pribyloff Islands), Alaska. 



Gonionenius Agassizii, sp. n. 



This species differs from the others so far known by the 

 smaller size and the greater number of tentacles, and the larger 

 gastric cone. Ibe bell is hemispherical. The four radial 

 canals bear the frilled gonads on the under surface. The 

 tentacles are provided with the characteristic adhesive pad 

 near their ends. 



Found in a salt lake on Unalaska (Aleutian Islands). 



Ann. (fe Mag. N. Hist. Ser. 7. Vol. ix. 6 



