350 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



off Grenada in 159 fathoms, but the latter has very short arms, and 

 this character seems to me sufficient to separate it from B. conspicua* 

 I can not understand why Matsumoto in describing B. gotoi com- 

 pares it only with B. lacertosa, which has the arms very short, and 

 does not mention the other species of the genus which have the arms 

 elongated like itself. 



If the identity of B. heros and B. tessellata with B. compicua 

 ivhich I suspect should be confirmed, it is obvious that the name 

 heros must be used, as that name has priority ; but I do not dare to 

 make this change before I have more complete comparative data, 

 and I have thought it best to call the species collected by the Alba- 

 tross, B. conspicua. 



CRYPTOPELTA TECTA, new species. 



Plate 78, figs. 1, 2. 



Locality. Albatross station 5174; in the vicinity of Jolo; Jolo 

 Light bearing E., 4.82 kilometers (2.6 miles) distant (lat. 6 03' 45" 

 N., long. 120 57' 00" E.) ; 37 meters (20 fathoms) ; March 5, 1908; 

 crs. S. 



One specimen (Cat. No. 41391. U.S.N.M.). 



Description. The diameter of the disk is 7 mm.; the arms are 

 30 mm. long; they are relatively broad, and much flattened. 



The disk is pentagonal; the dorsal surface is uniformly covered 

 with very small granules, which continue over the ventral surface, 

 where they cover not only the mouth pieces, but also the four or five 

 first under arm plates. These granules are not perfectly spherical, 

 but are somewhat elongated, and seen in profile they resemble small 

 and extremely short spines. In the vicinity of the genital slits, which 

 are broadly open and much elongated, these granules become some- 

 what coarser. The mouth papillae number nine or ten on either 

 side ; the four or five outer are broader than the others, almost as long 

 as broad, with the free border rounded : the other papillae are nar- 

 rower and conical. 



The first upper arm plate, which is quadrangular, is short, very 

 much broader than long, with the distal border rounded. The second 

 is similarly quadrangular, and also a little broader than long. The 

 third and the fourth are almost as long as broad, and the following 

 plates become a little longer than broad, while at the same time their 

 proximal border become shorter; the distal border always remains 

 convex. Toward the extremity of the arms the proximal border dis- 

 appears; the plates are then triangular and elongated, with a very 

 sharp proximal angle. The dorsal plates remain in contact through- 

 out almost the whole length of the arms, being separated only on the 

 last segments. 



