ACTIXOrODOT'S TTOLOTnurjOIDEA. 3?> 



of tlio arms are connoftod witli one anotlior, tluis foiistitiiting 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. Tlio to]) of the spire is irregularly spinous, often 

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

 violet or rose. Lengtii of the largest specimen, 1 10 to 150 mm." 

 (Thkel). 



liemnrhs : — It is somewliat remarkable that this species, whieli 

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

 Chilian coast, should be caught in the Sagarai Sea, and tliat in 

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

 might serve to separate the Sagarai Sea specimens from tliose of 

 tlie Chilian coast, at least so far as one can ol)tain an idea of the 

 latter from tlie descriptions and figin-es.'^' 



All my specimens are miicli smaller tliaii the "Challenger" 

 specimens. Tentacles I'O, often only aliout 17 can lie counted. 

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

 tened ; distinctly divid(>d into the ventrnm and tlie dorsum, 

 especially so in young specimens (.Spec. No. \A{y?>. etc.). In the 

 fresh state, the ])ody is distinctly flattened. Mouth subventral. 

 anus subdorsal. ]\[outli surrounded by a circle of papillae. 



In the ventrum tlie inedian amlmlacrum with pedicels ; these in 

 the older specimens arranged alternately m a double row or more 

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

 pedicels often become (mncealed in a longitudinal groove which 



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

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

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

 tables) do not stand in favor of referring it to SynaUartes. Xeither can it be a raelopalides 

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

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

 under treatment into n new genus which might be I'alled (Menjren'M. 



