Boone, Crustacea, Cruises of "Eagle" and ''Ara," 1921-28 113 



Genus: paeapeneus S. I. Smith, restricted. 

 Parapeneus longirostris (H. Lucas). 



Plate 35. 



Type: This species was first taken at Cape Matifou, Algeria, and 

 the type is deposited in the Paris Museum. 



Color: Pearly- white. 



Distribution: Found in the Mediterranean Sea, on the coasts of 

 Asia Minor, of North Africa, of the Hispanic peninsula and the 

 adjacent shores of the "Western Atlantic; littoral descending to a 

 depth of 500 meters. 



Material examined: Two specimens dredged in 100 fathoms, 9^/2 

 miles E. by S., % S., from Cape Bon Tunis, North Africa, Medi- 

 terranean Sea, July 19, 1927, 



Technical description: The specimen is a female, measuring 

 114 mm. long from the tip of the rostrum to the tip of the telson. 

 The carapace is compressed laterally, finely setiferous; the rostrum 

 slender, crested, arched above the eye, the distal third curved down- 

 ward and directed straight forward, its acute tip extending forward 

 for about five-sixths of the length of the scaphocerite and the carina 

 is continuous posteriorly on the carapace as a rostral carina, which 

 extends almost to the posterior border of the carapace ; there is one, 

 small, compressed, forward directed spine approximately midway the 

 rostral carina and eight approximately subequally spaced spines on 

 the rostrum, the hindermost one being approximately opposite the 

 base of the ocular cavity and the distal spine being about one-fourth 

 of the distance from the apex of the rostrum. There is a slight groove 

 along the proximal third of the rostrum below which the rostrum is 

 slightly thickened, convex; distally the rostrum is laterally com- 

 pressed, blade-like. There is an hepatic spine, below, and slightly in 

 advance of the ninth or post-rostral spine of the median carina. 

 There is also an acute antennal spine, and a smaller, subdistal ptery- 

 gostomian spine. The integument of the carapace is soft, semitrans- 

 parent, the gills showing through it. 



The abdomen is laterally compressed, the epimeral regions but 

 little produced ; those of the first four segments are similar, shallowly 

 rounded, that of the fifth segment more angulated posteriorly. The 

 sixth segment has a small spine subdistal to the postlateral angle. The 

 third abdominal segment is slightly produced, with the median 

 posterior margin rounded. The fourth, fifth and sixth segments 



