REPORT ON THE CRUSTACEA MACRURA. 



769 



four teeth on the upper margin and three on the lower. Laterally striated on each side 

 with two obtuse carinas, the upper corresponding with the first antennal tooth, the lower 

 with the second antennal tooth. 



Pleon smooth and dorsally rounded, terminating in a gradually tapering telson, 

 which is slightly truncated at the extremity. 



Ophthalmopoda short and globose. 



First pair of antennas subequal with the rostrum in length. 



Second pair as long as the animal. 



First pair of pereiopoda slender, the propodos scarcely stouter than the carpos. 

 Second pair twice the length of the first, the chela being long, narrow, and a little more 

 robust than the carpos. Third, fourth, and fifth pairs having the carpos and propodos 

 subequal in length and terminating in a short serrate dactylos surrounded by a brush of 

 ciliated hairs. 



Pleopoda biramose ; posterior pair subequal in length with the telson. 



Length, 



Habitat.— Station 309, January 8, 1876; lat. 50° 56' S., long. 74° 15' W.; Puerto 

 Bueno, Patagonia ; depth, 40 fathoms ; bottom, blue mud ; bottom temperature, 47°. 

 Three specimens, females. 



Station 305a, January 1, 1876 ; lat. 47° 48' 30" S., long. 74° 47' 0" W.; Messier 

 Channel; depth, 125 fathoms; bottom, blue mud. Six specimens; three males, three 

 females. Trawled. 



Station 306a, January 2, 1876 ; lat. 48° 27' S., long. 74° 30' W.; Messier Channel; 

 depth, 345 fathoms ; bottom, blue mud ; bottom temperature, 46°. Three males, largest 

 68 mm. Trawled. 



Station 307, January 4, 1876; lat. 49° 24' 30" S., long. 74° 23' 30" W.; off Port 

 Grappler ; depth, 140 fathoms ; bottom, blue mud. Forty specimens ; sexes about 

 equally abundant. Trawled. 



Station 308, January 5, 1876 ; lat. 50° 8' 30" S., long. 74° 41' 0" W.; off Tom Bay; 



(ZOOL, CHALL. EXP. — PART LII. — 1887.) ■ Fff 97 



