S. I. S))dth — Crustaceans of the Atlantic Coast. 93 



i, p. 24, pi. 1, 1870; Undersogelser over Hardaugerfjordeus Fauna. Crustacea, 

 Christiania Videuskabs-Selskabs Forhandlinger, 1871, p. 262 (19), 1872. — Metz- 

 ger, Jahresbericht der Comm. zur wissensch. Untersuchimg der deutschen Meere 

 fiir 1872, 1873, Nordsee, p. 288, 1875. 



Massachusetts Bay!, oif Salem, August, 1H77: 20 fathoms, rocks 

 and gravel; 33 fathoms, saucl and mud; and 48 fathoms, soft mud. 

 Skager Rack, 49 fathoms (Metzger). West coast of Norway !, 30 to 

 150 fathoms (G. O. Sars). Spitzbergen (Goes). 



Meterythrops, gen. nov. 



The large and very intei^esting species, for the reception of which 

 this genus is here proposed, was first made known to me, several 

 yeai's ago, by a few, more or less imperfect, specimens dredged in the 

 Gulf of St. Lawrence, in 1873, by Mr. J. F. Whiteaves, and, in his 

 report on dredging for that year, it is referred to, on my authority, as 

 a species " near to Erythrops and Parerythrops.'''' The same species 

 was dredged in 1877 by the party of the U. S. Fish Commission on 

 board the " Speedwell," but only imperfect specimens were obtained. 

 The following description and the accompanying figures are based on 

 this meager material. The species combines several characters of 

 the genera Erythrops and Parerythrops of G. O. Sars, but in general 

 appearance is more like the latter genus. The new genus may be 

 characterized as follows : 



The body very short and obese with the posterior cephalothoracic 

 segments almost completely covered above by the large and broad 

 carapax. The eyes well-develoi3ed, large, nearly globular, and black 

 after preservation in alcohol. The antennulse, antennae, and the oral 

 and cephalothoracic ajipendages nearly as in Parerythrops. The 

 pleopods in the female rudimentary and very nearly as in My sis ; in 

 the male, as in Erythrops., all the five pairs being well-developed 

 biramus, and natatory; the inner ramus in the first pair, however 

 rudimentary and with the terminal part membranaceous, expanded 

 and nearly naked. The telson long, narrow, sub-triangular the lat- 

 eral margins naked, and the apex narroAv, truncate, and armed with 

 four spines and two median setae. The ovigerous pouch composed of 

 four large lamellae nearly as in Mysis. 



Meterythrops robusta, sp. nov. 



Plate XII, figures 1 and 2. 

 The carapax as seen from above is of nearly equal breadth to near 

 the posterior extremity, where it i.s slightly contracted. The frontal 



