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PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol. 42. 



its anterior extremity it is provided with a strong spine, and just behind 

 the middle, with three long spines on either side of the lateral margin ; on 

 one side there is a fourth spine in front of the three lateral spines. On 

 the dorsal surface just within the anterior lateral spines are two small 

 spines, one on either side of the median line, and behind these at 

 about the middle of the segment are two other small spines, one being 

 larger and more conspicuous than the other. The posterior end of 

 the segment is slightly triangular. The basal article of the uropoda 

 is about twice as long as wide; the outer branch is composed of 17 

 articles; the inner branch is lost. On the ventral side of the sixth 

 segment of the thorax (fifth free segment) there is a long median 

 spine and a short one is present on each of the first five abdominal 

 segments. 



Half of one specimen was taken by the U. S. Bureau of Fisheries 

 steamer Albatross March 2, 1888, at station 2792, off Cape San Lorenzo, 

 Ecuador, in lat. 00° 37' 00" S.; long. 81° 00' 00" W., at a depth of 

 401 fathoms, in green mud. 



The type is Cat. No. 43504, U.S.N.M. 



This is the first species of Apseudes recorded from South America. 

 It is an unusually large member of the genus. The other 28 known 

 species are as follows: 



talpa (Montagu). 

 latreilli (M. Edwards). 

 spinosus M. Sars. 

 csecus Willemoes-Suhm. 

 australis Has well. 

 obtusifrons Haswell. 

 latus Chilton. 

 timaruvius Chilton. 

 tenuimanus G. O. Sars. 

 echinatus G. O. Sars. 

 robustus G. O. Sars. 

 spectabilis Studer. 

 antarcticus Beddard. 

 uncidigitatus Norman and Steb- 

 bing. 



obtusifrons 1 Norman andStebbing. 

 simplicirostris Norman and Steb- 

 bing. 



grossimanus Norman. 

 gracilis Norman and Stebbing. 

 sculptus Pfeffer. 

 intermedins Hansen. 

 Mbernicus Walker. 

 multicarinatus Whitelegge. 

 espinosus Moore. 

 triangulatus Richardson. 

 propinquus Richardson. 

 seurati Nobili. 

 rikiteanus Nobili. 

 armatus Richardson. 



The species described by Bonnier 2 as Apseudes Icoehleri is probably 

 a synonym of Apseudes spinosus, as Norman has previously stated. 

 Norman has also referred A. acutifrons Sars and A. Jiastifrons 

 Norman and Stebbing to a new genus Apseudopsis. 



1 Since the specific name of this species was used by Haswell five years earlier, I therefore name this 

 species Apseudes retusifrons. 

 3 Ann. TJniv. Lyon, vol. 26, 1896, p. 562. 



