PART 5 A MONOGRAPH OF THE EXISTING CRINOIDS 327 



The color in life is given as "aboral side chrome yellow, arms dark orange." 



Notes on the paratypes. — Some of the characters which can be enumerated are 

 shown in the table. The blanks are due to loss, regeneration, concealment or irregu- 

 larity (such as in the position of the third syzygy). 



The proportions of the centrodorsal vary considerably. About 5 of the specimens 

 have a distinct pit at the apex with consequent reduction in the height, but it is usually 

 rounded conical or hemispherical. 



The number of cirri does not appear to increase with size, several of the specimens 

 with more massive arms having only the minimum number of cirri. 



The synarthrial tubercles vary in development and may be even more exaggerated 

 than in the holotj'pe, completely occluding the IBri and first brachial in the midhne. 



The greatest variation in the pinnules is in P2. This may bear a small gonad but 

 even so it may be comparable in length to Pj. However, there is obviously a tendency 

 towards abbreviation when it is a genital pinnule since one specimen has at least one 

 P2 with no gonad, which has 38 segments and is 18 mm. long, while another P2 bearing 

 a small gonad has only 33 segments and is 14 mm. long. 



P3 is usually the first genital pinnule but it may be P2 or P4. 



The ratio of basal diameter to vertical height of the centrodorsal in 15 of the 

 specimens ranges from 1.0 to 2.2:1, averaging 1.7. The ratio of the length of the 

 division series and first nine brachials to the width at the first syzygy in 20 specimens 

 averages 5.3:1. This compares with an average of 7.0:1 in F. mawsoni where the 

 arms are relatively narrower. 



Since completing this monograph, I received two other specimens identifiable as 

 Florometra aiistini from Prof. H. B. Fell at that time of Victoria University of Welling- 

 ton. These were collected in Cook Strait at about 300 fathoms. Unfortunately both 

 of them have every Pi either broken or regenerating, but the original segments appear 

 to have the same proportions as in the type specimens. The details corresponding 

 to those given in the table for the better preserved specimen are as follows: Centrodorsal 

 4.5 mm. in basal diameter and 2.5 mm. in radial height (the shape rounded conical); 

 arm breadth at the first syzygy 2.1 mm. and the length to the second syzygy 10.5 

 mm.; LXXII cirri, the only peripheral one seen having 40 segments and measuring 

 35 mm. in length; Pi with up to 52 segments, with which number it is 16 mm. long, Pj 

 witii over 36 segments and Pa with over 50 segments and measuring at least 21 mm. in 

 length. There were probably some longer peripheral cirri present when the specimen 

 was intact, which would bring the total within the range of 42-59 segments found in 

 the type series of F. austini. An interesting abnormality is the bifurcation of a Pi at 

 the fifteenth segment, the two branches being aligned in the dorsoventral plane, each 

 of them having an additional 22 segments, or thereabouts. 



Localities. — Discovery Investigations station 2211; off Campbell Island, south of 

 New Zealand Qat. 52°29.3' S., long. 169°18.2' E.); 159-157 meters; January 28, 1938 

 (2, B.M.). 



Discovery Investigations station 2215; off the Antipodes Islands (lat. 49°45.6' S., 

 long. 178°48' E.); 163-210 meters; February 19, 1938 (the holotype and 46 paratypes, 

 B.M.). Type locality. 



Victoria University of Wellington station 116; eastern end of Cook Strait, New 

 Zealand; about 550 meters (2, B.M.; Victoria Univ.).* 



* See footnote on p. 324 for extra record. 



