142 



T. FUKUDA. 



Gonodactylus glabrous, Brooks, Rep. Voy. Challenger, XVI, ii, p. 

 62, Pl. XIV. Fig. 5; Pl. XV, Figs 7, 9 (i886)-Jurich, Die 

 Stomatopoden der Deutschen Tiefsee Expedition, p. 376 (1904). 



Gonodactylus grap/iurus, dc Man, Arch, für Naturg. 53 Jahrg. I, 

 P- 573 (1887) 



Remarks.— Brooks, when he first founded this species, gave several 

 points of detail, by which this species might be distinguished from 

 G. graphurus. Among them the following seem to be the more 

 important : — 



i) Sutures upon the first five abdominal segments absent. 



ii) Dorsal median carina absent upon the sixth abdominal seg- 

 ment. 



iii) All the dorsal carina; upon the last two segments more 

 sharply defined and less swollen and rounded than they are in G. 

 graphuriis. 



In all my specimens (one male and seven females) the length 

 of telson is nearly equal to its width and its general outline resembles 

 Brook's figure of G. glabrous. The transverse sutures on the first five 

 abdominal segments are lacking. But the median carina, characteristic 

 of G. grapliurus occurs upon the sixth abdominal segment also, though 

 it is in some cases only very faintly marked. Besides, some specimens 

 show the lateral longitudinal sutures upon the first five abdominal 

 segments ; and the five carina; upon the dorsal elevation of the telson 

 are in some individuals like those of G. glabrous as described and 

 figured by Brooks. In some other specimens these carina: rather 

 resemble those of G. graphurus. Thus, many of the chief distinctive 

 characteristics between the two species appear to be of doubtful value, 

 and consequently it would be more advisable to regard these two 

 forms as varieties of one and the same species. 



Locality.— Five females from Okinawa ; one male and two females 

 from the Ogasawara Islands. 



