174 MESSRS. L. MURBACH AND C. SHEARER ON [June 16, 



to a sticky secretion on the bell-surface or to mere roughness 

 of this surface on which small particles become lodged. Forbes 

 (16), in speaking of T. inlosella, says of the bell : " It is transparent 

 and smooth, except on the sides towards the margin, where it is 

 as if woolly, being invested with minute epidermic hairs composed 

 of fibrous cells." Perhaps the presence of these foreign bodies 

 was due to some similar condition. The question cannot, however, 

 be settled from formalin material, as in this flviid the bell-surface 

 takes on a peculiar scaly appeai-ance, no woolly or hairy condition 

 can be made out. Haeckel (18) has called attention to the 

 similarity between this species and that reported from Greenland. 

 Our specimens differ from the Greenland species in the possession 

 of broader oral lobes, the beU- or bottle-shaped tentacle-bulbs, 

 and the fact that the gonads are situated throughout the whole 

 lene'th of the radial canals. 



II. Oannotid^ Haeckel. 



Subfamily Polyorchid^ A. Agassiz. 



PoLYORCHis A. Agassiz. 



1. PoLYORCHis MiNUTA, sp. nov. (Plate XIX. fig. 3 and Plate 

 XXII. fig. 1.) 



Specific description. — The bell is 15 mm. high by 12 mm. broad, 

 a truncated oval with thick walls. It is broadest above the 

 middle of its height, measuring the 12 mm. already given. 



A prominent cone-shaped gelatinous peduncle depends from 

 the bell-roof, and to this the stomach, the upper ends of the 

 radial canals, and the gonads are attached. The bell is drawn in 

 towards the mouth so that its diameter at this point is only 

 9 mm. The lower truncated edge of the bell is nearly as broad 

 as the velum. This is strong and 2*5 mm. in breadth. There 

 are eight delicate adradial lines running meridionally in the bell- 

 substance. 



There are 55 tentacles — 26 large, 20 medium, and 9 rudimentary. 

 There are nine more spaces, so that 64 tentacles should be present 

 in all. The hollow tentacles are stout and taper to form a rather 

 long root at their proximal end. They are slightly swollen just 

 at the junction of the root and tentacle proper forming the 

 tentacle-bulb. The mature tentacles which are attached to the 

 bell-margin by these long roots are carried very much as shown 

 in PI. XIX. fig. 3. Small tentacles during growth move outward 

 on the lower truncate bell-margin, producing thus the appearance 

 of several rows one above the other. On some of the tentacles 

 there appear smooth areas free from nematocysts, whereas, as a 

 rule, the whole surface of the tentacle is usually covered with 

 large and small nematocysts. 



The ocelli are yellowish green in the preserved condition, and 



