A REVIEW OF THE MYSIDACEA 21 



with four teeth on the outer margin in addition to the terminal spine. 

 The telson has six spines on the lateral margins including the apical 

 spines, and between the latter are five spinules. In most of its charac- 

 ters this specimen agrees with L. typicus but lacks entirely the tubercles 

 on the carapace so characteristic of that species. The form of the 

 scale and the rostral plate are quite distinct from those of L. japonicus 

 and L. intermedins. Further material must be had before it is given 

 a specific name. 



LOPHOGASTER SPINOSUS Ortmann 



Lophogaster spinosus Ortmann, 1906, p. 26, pi. 1, figs, la, 16. — Zimmeb, 1914, 

 p. 382.— Tattersall, 1926, p. 7 ; 1937, p. 1. 



Occurrence. — Bahama Islands: Bache station 10195, north of 

 Bahamas, latitude 29° N., longitude 76°23' W., 100-0 meters, February 

 28, 1914, 1 juvenile specimen. West Indies: Johnson-Smithsonian 

 expedition, 1933, station 86, series number 495, latitude 19°18'30" N., 

 longitude 65° 16' W., about 350 fathoms, February 27, 1933, 4 speci- 

 mens, 16 to 20 mm. Southeastern coast of the United States: 

 Albatross station 2666*, type, identified by Ortmann (1906). 



Distribution. — Deep water of the Atlantic Ocean from about lati- 

 tude 30° N. to latitude 30° S. 



Remarks. — I recorded these specimens in 1937 without comment, 

 and I now add a few notes on them. The length of the specimens 

 given above is measured from the eye to the telson. The rostral 

 process is about one-fifth of this length and extends forward beyond 

 the e}^e and well beyond the antennal scale. The posterolateral spines 

 of the carapace extend backward for lengths varying from the end of 

 the second abdominal somite in the smaller specimens to the end of 

 the third abdominal somite in the larger specimens. The antennal 

 scale has 9 to 12 teeth on the outer margin in addition to the terminal 

 spine. In no specimen is the scale symmetrical in this respect on 

 both sides of the same individual. The lateral margins of the telson 

 have 5 or 6 spines including the apical spines, and between the latter 

 are 6 spinules. The carapace is smooth. This species is a very dis- 

 tinct form characterized mainly by the very long rostral and postero- 

 lateral spines of the carapace and the long and somewhat narrower 

 form of the antennal scale, with its large number of teeth on the outer 

 margin. 



LOPHOGASTER LONGIROSTRIS Faxon 



Lophogaster longirostris Faxon, 1896, p. 164, pi. 2, figs. 8-10. — Tattersall, 

 1937, p. 1. 



Occurence. — West Indies : Johnson-Smithsonian expedition, 1933, 

 station 23, series number 117, latitude 18°32' N., longitude 66°21'15" 

 W., 260 fathoms, February 4, 1933, 1 speciman, 37 mm. ; station 93, 



