304 L. R, CRAWSHAY. 



relative length of the gastral ray to that of the facial rays in the 

 gastral quadriradiates ; while in regard to the second point used by 

 Haeckel (14), namely the relative width of the monaxons to that 

 of the triradiates and quadriradiates, the character appears to me 

 to be too variable to serve for purposes of distinction. As regards the 

 first character, however, both types are exemplified in the Plymouth forms 

 with every gradation between the two extremes, and further, the short 

 gastral ray of the ciliatum type is apparently more characteristic of the 

 in-shore specimens, while the longer corresponding ray of the coronatum 

 type commonly occurs in the deeper water. A still more important 

 point arises in the occurrence of at least one instance I have seen, in 

 which both the short and the long gastral ray are present in the same 

 specimen. A careful examination of a larger number of examples 

 is needed to establish the point satisfactorily, but in the meantime 

 I am unable to regard the two forms as specifically distinct. 



In three of the six specimens here considered the relative length of 

 the gastral and facial rays is roughly as 7 to 8, 3 to 4, and 1 to 3, 

 severally ; while the average relative width of the monaxons and 

 radiates is about li-2J to 1. 



GEANTIDAE, Dendy. 

 Grantia capillosa (0. Schmidt). 



At Positions 1 (one), 3 (one), 4 (three), 36 (one), 37 (two), 49 (one 

 very young), 53 (one very young), 70 (two), 80 (one). 



Depth, 40-51 fath. 



The genus Grantia, to which this species is referred, is here regarded 

 as it is defined by Dendy (13), but with the modification that it does 

 not of necessity exclude the occurrence of the monaxons in bundles at 

 the distal ends of the radial tubes. This reservation would seem alike 

 to involve Dendy's family Grantidac, although as defined by him (13) 

 it is not literally restricted on the point. In other respects the species 

 capillosa seems to have its proper position in this family and genus, 

 owing to the presence of a distinct dermal cortex covering the distal 

 ends of the radial chambers. The arrangement of the monaxons is 

 rather irregular. For the most part they are grouped in bundles about 

 the ends of the radial chambers, this arrangement being often retained 

 even where the latter are subject to branching, as frequently occurs at 

 the extreme apex. Less frequently they are disposed without much 

 regularity. But they are always large and stout, and usually penetrate 

 for a considerable distance towards the gastral surface. Their disposi- 

 tion is in fact near the border line between the two forms of arrange- 

 ment which Dendy defines for the Sycettidae and implies for the 



