MYSIDACEAN CRUSTACEANS — TATTERSALL 531 



Pacific Ocean 

 9. L. pacificus Fage (1940, = L. japonicus W. M. Tattersall, 1951): 

 China Sea to north of Formosa and off the east and southeast 

 coasts of Japan in the path of the warm Kuora-Shio Current, in 

 habiting higher levels as the current flows northward. 



10. L. hawaicnsis Fage (1940): around Hawaii. 



11. L. intermedins Hansen (1910): off the Moluccas, southeast of 



Celebes, off New Guinea, Mergui Archipelago, eastern Bay of 

 Bengal. 



12. L. mullispinosus Fage (1940): off Fiji and Samoa. 



13. L. schmidti Fage (1940): north of New Guinea, north of the Maluccas, 



south of Amboine, east of Ras Ilafun. 



Lophogaster longirostris Faxon 



Fir, ire 1 



Lophogaster longirostris Faxon, 1896, p. 164. — W. M. Tattersall, 1937, p. 1. — 



fage, 1910. p. 327; 1942, p. 21.— \Y. M. Tattersall, 1951, p. 21. 

 Lophogaster typicus Ortmann, 1906, p. 23. 

 Lophogaster americanus W. M. Tattersall, 1951, p. 17. 



Remarks: This species was founded by Faxon on 20 specimens 

 captured by the U.S. Coast Survey Steamer Blake in the Gulf of 

 Mexico at 119 fathoms. The description, which I quote in full, is 

 very brief: "Similar to L. typicus Sars but different in the great 

 length of the medium spine of the rostrum which far surpasses the 

 antennular peduncle and almost attains the tips of the antennal 

 scales. There are 6 teeth along the outer edge of the antennal 

 scale. Length 27 mm." The figure of the telson given by Faxon 

 shows seven lateral spines on each lateral margin in addition to the 

 long apical spine. 



Ortmann (1906), when reporting on collections of Lophogaster from 

 nine stations in the western Atlantic (three from the Gulf of Mexico, 

 three oil' Key West, and three from off the coasts of the Carolinas), 

 commented on the length of the rostrum and the variation displayed 

 in the number of teeth arming the outer margin of the antennal 

 scale and of the spines on the lah ral margins of the telson. Because 

 of much individual variation in these characters, he decided that they 

 had no specific value and referred all the specimens to L. typicus. 



Tattersall (1951) separated the Lophogaster material of the western 

 Atlantic into two species: (1) longirostris, for those specimens occurring 

 in the Caribbean atid the Gulf of Mexico, and (2) a new species, 

 americanus, for those taken off Key West and along the path of the 

 Gulf Stream as far as the southern part of Massachusetts. In describ- 

 ing his new species, he enumerated the characters distinguishing it 

 from /.. typicus and especially stressed the fact that the integument 

 of the carapace was minutely spinulose, but he made no detailed 

 comparison between it and longirostris. 



