ACTINOPODOTTR TTOLOTnuniOTDEA. 33 



of the arms are connoetcd witli one another, thus constituting a 

 perforated plate ; the spire is composed of four rods, and one, 

 seldom two, transverse beams ; the spire is often devoid of trans- 

 verse beams. The top of the spire is irregularly spinous, often 

 with four larger teeth. Colour in alcohol, whitish, inclining to 

 violet or rose. Length of the largest specimen, 140 to 150 mm." 

 (Thkel). 



Femarks : — It is somewhat remarkable that this species, wdiich 

 has not been found since the " Challenger " dredged it along tlie 

 Chilian coast, should be caught in the Sagami Sea, and that in 

 large numbers. A careful study has failed to reveal points which 

 might serve to separate the Sagami Sea specimens from those of 

 the Chilian coast, at least so far as one can obtain an idea of the 

 latter from the descriptions and figures.''' 



All my specimens are mach smaller than the " Challenger " 

 specimens. Tentacles 20, often only about 17 can be counted. 

 Body in some almost cylindrical, in others more or less flat- 

 tened ; distinctly divided into the ventrum and the dorsum, 

 especially so in young specimens (Spec. No. 14(33, etc.). In the 

 fresh state, the body is distinctly flattened. Mouth subventral, 

 anus subdorsal. Mouth surrounded by a circle of papillae. 



In the ventrum the n^iedian ambulacrum wdth pedicels ; these in 

 the older specimens arranged alternately in a double row or more 

 crowdedly in the large part of tlie middle region of the body. The 

 pedicels often become concealed in a longitudinal groove which 



* The following is an additional note made by the author in ijencil. dated Oct. 10, 1903 : — 

 The presence of numerous pedicels on the odd ventral ambulacrum makes it not desirable to 

 put this species in Bathyplotes, while its flattened shape and calcareous spicules (4-pillared 

 tables) do not stand in favor of referring it to Synallddes. Neither can it be a Paelopatides 

 as the middle odd ambulacrum has more than two rows of pedicels. The characters indicated,, 

 together with the presence of peculiar lateral warts, seem to justify the erection of the species 

 under treatment into a new genus which might be called Ostergrenia. 



