188 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Description. — Most of the abactinal paxillae with a central spinule, 

 0.75 to 1 mm. long; these spinules are uniformly distributed all over 

 the abactinal surface, even to tip of ray, which has in consequence a 

 hirsute appearance. The larger paxillae have 8 to 15 short blunt 

 papilliform spinelets in a circle around the central slender terete 

 spine. These stand upright or diverge slightly ; they are not closely 

 appressed to the base of the spine, as in Sladen's figure of mhnicus, 

 (But Tnimicus is variable in this respect.) These spinelets are pres- 

 ent on the outer part of ray, but are smaller, and reduced to 3 to 6. 

 Papularium very broadly oval, small, with 20 to 25 pores. A line 

 drawn across the base of ray passes through the middle or outer half 

 of the papularium. Abactinal pedicellariae normally absent; I find 

 a single inconspicuous one in the type. There are none on a speci- 

 men from station 5619, plentifully supplied with actinal pedicellariae. 



Superomarginals 41 (in type), confined to side wall of ray and 

 bearing near the upper edge a stout conical spine, equaling (beyond 

 the fourth or fifth) about 1^ to If plates in length. It is a little 

 shorter than that shown in Sladen's figure of mimiciis^ and a little 

 shorter than in the Albatross specimens of mimicus. The general 

 surface of the plate is covered with papilliform spinelets similar to 

 those of the paxillae, but a little longer. These are slightlj'- spaced, 

 and are present all over the proximal plates, but distally they are 

 widely spaced and leave an area around the base of the spine, nearly 

 or quite bare. Rarely, near the middle of ray there are a few 

 fasciculate pedicellariae on the intermarginal suture. These are 

 present only in the type, which is from rather deeper water than the 

 other specimens. There is also, in the type, in 3 interradii, a small 

 intermarginal pedicellaria, similar to that Avhich is rather char- 

 acteristic of the form here called mimicus. 



Inferomarginals with a stout, sharp, conical spine (3.5 mm. long), 

 slightly larger than that of superomarginals, and close to upper edge 

 of plate; below this, a smaller spine, about one-third or one-half as 

 long. The tapering, bluntly-pointed spinelets are a little longer 

 than described by Sladen for mhilcus (but suboijual to the spine- 

 lets in Albatross specimens of mimicus), and while they are rather 

 widely spaced on the actinal surface, there is no definite naked area 

 such as seems to be characteristic of mimicus. They can not by any 

 stretch of the imagination be called granuliform. 



Actinal interradial areas small and plates not extending beyond 

 third inforomarginal. The plates boar spaced, short, slender, equal 

 spinelets or upward of 8 or 10 pectinate-fasciculate and fasciculate 

 pedicellariae to each interradial area. The type has 6 or 8 to each 

 area, while in specimens from station 5619 they are present also on 

 the ventral surface of upward of 10 or 15 proximal inferomarginals. 

 The pedicellariae are subcircular, with 4 to 6 short, stout, pointed 



