KEPORT OX THE ALCYONAKIA. 53 



Species belonging to the following genera are found in the collection : — 



1. Calypterinus, n. gen. 



2. Stachyodes, n. gen. 



3. SteneUa, Gray {emend.). 



4. Tliouavella, Gray (emend.). 



5. Ainjyhilaphis, n. gen. 



6. Plumarella, Gray. 



7. Caligorgia, Gray. 



8. Primnoella, Gray. 



Genus 1. Calyiyterimis,^ n. gen. 



Axis simple, consisting of a lioruy matrix, lai'gely filled with calcareous particles. 

 Poly[3s arranged in regular verticils on the axis, of from five to seven each ; at each 

 verticil a portion of the axis is free from polj^ps, but the large wing-like calcareous spicules 

 of the lateral polyps overlap and form a circular opening, which runs in a direct line all 

 along that portion of the axis which is free from polyps. The poh-ps are thus in a measure 

 bilaterally arranged. The basal portion unknown, but it would appear as if the pol}i:)s 

 in this genus opened with their oral region looking downwards. 



Calyptennus cdlmani, u. sp. (PL XL figs. 1, \a; PI. XIV. fig. 5 ; PI. XX. fig. 2). 



This species is represented in the collection l)y two specimens of about 100 mm. 

 in height. In the more perfect specimen, the axis towards the apparent basal portitjn 

 is brittle and hard, 1 mm. in diameter, somewhat more horny and less calcareous 

 towards the apex, but always leaving a well-developed horny matrix when treated 

 with an acid. The ccenenchyma of the axis is thin, wdth large, oblong, minutely 

 tuberculate, scale-like spicules, which allow the iridescent axis to be seen through them. 

 The polyps are arranged in a bilateral manner on the axis, in verticils of from four to 

 seven each ; judging of the Ixisal and apical portions of the axis by their hardness, it 

 would seem that the polyps look downwards, but they appear to have in common with 

 many of the members of the subfamily a power of folding themselves inwards on the 

 axis. The polyps arc 3 mm. in height, with a diameter of 1 mm. The intervals between 

 the verticUs of polyps varies, being sometimes not appreciable, and at other times it is 

 about 1 mm. The spicules on the body of the polyp are arranged in three series — not 

 counting a few small scales connecting the body of the poly]? to tlie main axis ; the 

 first row consists of two large scales, wing-like, one overlapping the other at its ba.se. 

 In the case of the lateral polyps in each verticil, one of these scales from either pol}ii 

 forms part of the arch of the tunnel, which runs in a direct line along the main axis ; 

 these scales measure about 2 mm. in length, and about 2 mm. in the widest part. 

 These spicules will Ijc best understood on reference to PI. XIV. fig. 5, where the figure 5 



' r.«>,i/*, Trripiuo;. 



