No. 16?»n. 



SOME NEW ATLANTIC I80PODA— RICHARD SON. 



83 



Pig. it. Bbteromb- 

 s u s grami. ati's. 

 Middle part <>f 



BODY OF MALE. 



The first segment of the abdomen is short; the terminal segment 



is longer than wide and has the posterior margin produced in a 



prominent rounded lobe. In the female the uro- 



poda are shorter than in the male, and scarcely ex- 

 tend much beyond the median lobe of the abdomen. 



In the male they are a little more than twice the 



length of the median lobe of the abdomen. They 



consist in both sexes of one long, pointed, spine- 

 like article. 



About fifty-seven specimens were collected by 



the steamer Albatross in the following localities: 



Forty-one females and four males at Station 2547, 



south of Marthas Vineyard, taken at a depth of 



390 fathoms; two males and one female at Station 



2572, southeast of Georges Bank, taken at a depth of 1,769 fathoms; 



one male at Station 2571, southeast of Georges Bank, taken at a depth 

 of 1,356 fathoms; one male and six females at Sta- 

 tion 2208, south of Block Island, taken at a depth of 

 1,178 fathoms, and one female at 

 Station 2078, off Georges Bank, 

 taken at a depth of 499 fathoms. 

 The type from Marthas Vine- 

 yard is in the U. S. National Mu- 

 seum, Cat. Xo. 38969. 



This species is perhaps closer to 



meteroT/n sus gn eni ( Tattersall) than to any others 



of the genus; it differs, however, from that species 



in the character of the surface of the body which is 



covered with low granulations, and not with '"spine- 

 like tubercles; " in having a rudimentary flagellum 



to the first antenna 1 ;'' in the shorter uropoda of 



the female (Tattersall figures only the female) ; 



in the fewer articles in the flagellum of the second 



antenna 1 which also has the three elongate first 



articles; and in the peculiar markings on the body. 



Fi.;. is. BETERO- 

 mesos Granula- 

 ns. Abdomen of 



MALE. 



HETEROMESUS SPINESCENS, new species. 



Pig. 19. — Hetbro- 



M E s I s SPINES- 

 CENS. Male. 



This species is Aery close to the preceding, but dif- 

 fers in having a two-jointed flagellum to the first antenna 1 ; in the 



"Fisheries, Ireland, Sci. Invest.. 1004, II [10051. pp. 20-22, pi. iv. figs: 1 6. 



6 In all fifty-seven specimens the flagellum is rudimentary. I examined each 

 one carefully, because at first I supposed the flagellum was broken, but a 

 minnte article was finally discovered, which is almost imperceptible. 



