Bdiiioiidsoii — Sfonialopoda in tlic Bishop Museum 285 



]\Ioi'e thorough and extensive surveys of the reefs and shallow- 

 waters about the Hawaiian and other islands of tropical and sub- 

 tropical seas will, no doubt, greatly increase the number of known 

 species of the group and throw added light on the problem of 

 distribution. 



One of the interesting- disclosures resulting- fron-i a study of 

 the collection of Squillidae in the Bishop Museum is the fact of 

 the occurrence in the Hawaiian waters of Odontodactylus haiiscnii 

 (Pocock), previous!}- reported from the China Sea, and Squilla 

 alba Big;elow, known only heretofore as fron-i the Bahamas. More 

 complete knowledge of the Stomatopoda will, no doubt, reveal a 

 much more extensive distribution of many of the species previously 

 believed to be somewhat restricted in their dispersal. The long- 

 life of the larvae, together with favorable ocean currents, may 

 possibly explain the presence of the same species in widely sepa- 

 rated regions, especially in the same ocean. It is only reasonable, 

 however, to believe that more complete survevs would reveal the 

 species in intervening- localities and thereb}' shorten the links of 

 the distributional chain. 



Attention is here called to the structural difference between 

 the male accessory organ of Lysiosquilla inacidata ( Fabricius ) in 

 specimens from Tahiti as compared with that in the specimens from 

 Hawaii. A large number of Hawaiian specimens, however, should 

 be examined before conclusions regarding a fixed local variety 

 can be drawn with certaintv. 



[7] 



