192 BULLETIN OF THE 



There is, however, in the fragment of the anal part of test a very distinct and 

 well-defined subanal fascicle, as in Eupatagus, and a somewhat indistinct peri- 

 petalous fasciole close to the ambitus, as in Paleopneustes Murmyi A. Ag. Chall. 

 Echini, far outside of the termination of the petals. There are large tubercles 

 on the interambulacral plates between the petals extending to the peripetalous 

 fasciole, arranged in more or less regular horizontal lines. Only fragments oi 

 the interambulacral areas near the abactinal system, nothing of the actinal 

 surface of the test brought up. The primary tubercles carry long, stout, 

 slightly curved spines. 



(Sigsbee.) OS Havana. 242 fras. 



Palaeotropus Josephinse Loven. 



(Sigsbee.) Off Havana. Lat. 22° 09' N., Long. 82° 01' W. 242 fms. 

 (Sigsbee.) Oflf Havana. 177 fms, 



Paleopneustes cristatus A. Ao. 



A young specimen, not more than one half an inch in length, was dredged in 

 175 fathoms, off Havana, by Captain Sigsbee. It differed in no way from the 

 older specimens, except, of course, in having a smaller number of plates, but 

 preserved all the characteristics of the larger specimens figured in the Hassler 

 Expedition Echini. 



(Sigsbee.) Off Havana. 175 fms. 



(Sigsbee.) Off Havana Lat. 22° 11' N., Long. 82° 21' W. 242 - 450 fms. 



Rhinobrissus micrasteroides A. Ag. spec. nov. 



A small specimen of this genus, but half an inch in length, differing from the 

 only other species of this genus in having its lateral ambulacra less sunken, 

 a sharper, thinner peripetalous fasciole, a more vertically truncated posterior 

 extremity. This species shows the affinity of the genus Rhinobrissus with Mi- 

 craster, from which it differs in having a peripetalous fasciole and an anal 

 branch of the subanal fasciole. 



In alcohol the spines are of a greenish color. Anal plastron quite short, and 

 wide ambulacral areas on the actinal side. Many of these characters will prob- 

 ably greatly change with age, and I merely allude to this interesting species, 

 as it is, with the fragments of the genus allied to Eupatagus, another of the 

 few genera of Echinidm in common between the West-Indian and the Pacific 

 Fauna?. 



(Sigsbee.) Off Havana. 175 fms. 



Brissopsis lyrifera Ao. 



Station No. 49. Lat. 28° 51 i' N., Long. 89" 01 i' W. 118 fmu. 

 (Sigsbee.) Off Havana. 122 - 240 fms. 



