THE PLANKTON OF THE FAROE CHANNEL AND SHETLANDS, 357 



curved distallj. They bear from 5-15 minute teeth subalternately 

 placed along the edges of the spines, but only in their distal fifth. 



The measurements (from average-sized specimens) are : Diameter of 

 the calymma, '73 mm. ; of the central capsule, '16 mm. ; length of the 

 radial tubes, '75 mm. ; greatest thickness, "Ol mm. The radial tubes 

 number from 28-30, never more ; the tangential network which sur- 

 rounds the jelly consists of fine needles, which form a mesh without 

 branching. Like the radial tubes, they are not dissolved by mineral 

 acids. The central capsule is covered with a tough investing mem- 

 brane, has an operculum (striated), and a nucleus occupying its centre 

 and about half its size. The pliseodium is copious. 



AULOGKAPHIS FUKCELLATA, n. S2X Plate I., Fig. 1. 



This species was captured at 250 fathoms. The animal, in shape 

 more or less spherical, had a diameter of 1'5 mm. The calymma con- 

 tains a tangential needle system, the needles being thicker than those 

 of Aulacantha, but while crossing and recrossing one another, nowhere 

 branched or anastomosing. The central capsule lies in an extensive 

 phffiodella, of which many of the green cells are of very large size. 

 Eadiating through the calymma are about 40 tubes, many of which 

 are slightly curved distally. They are broad towards the proximal 

 end, and taper as a rule but slightly towards the distal end ; all appear 

 as if grooved in the outer portion, and while some are very broad, 

 others are of much slighter build. At the extremity of each radial 

 tube are two very short simple branches, bearing neither teeth nor 

 spathillffi. Each is curved and more or less crescent-shaped. 



Length of tubes, "3 mm. ; breadth, "09 mm. (in middle). 



I am unable to refer this to any of Haeckel's Aulographantha, 

 though it bears all the characters of the genus Aulographis. It certainly 

 does not correspond to either of the three forms, A. pistillum, pcniciUata , 

 IKindora, the habitat of which is the North Atlantic. 



Aulographis tetrancista {Eaeckd), variety. 

 Plate I., Pigs. 2 and 2a. 



In this animal there is a tangential needle system in the calymma 

 of rather thick single rods, resembling the last-mentioned species. 

 The diameter of the whole animal is about 2-3 mm., and there is 

 an extensive pha;odella. The tubes are frequently slightly curved, 

 a few considerably bent at the distal end. Thick and broad in the 

 middle, they taper towards each end, but more at the proximal 

 extremity, where they terminate in a rounded end. Towards the 

 distal extremity they appear grooved. Each radial tube carries a 



