FISHERY BULLETIN: VOL. 72, NO. 1 



Figure 4. — Actidcus tiicshrechii. Female: A, posterior part of body, lateral. Male: B, habitus, dorsal; C, posterior 

 part of body, dorsal; D. posterior part of body, lateral; E, habitus, lateral; F, 19th segment of antennule; G, 

 first leg, anterior; H, second leg, anterior; I, fifth leg, anterior. 



Dixtrihiition. — A. aciifiis was originally de- 

 scribed from off New Zealand (Farran, 1929). 

 The species has so far been known to occur on 

 the Great Barrier Reef (Farran. 1936), in the 

 Malay Archipelago (Vervoort. 1957), off the 

 Pacific coast of Middle Japan (Tanaka, 1957; 

 Tanaka and Omori, 1970). in the tropical Pa- 

 cific (Grice, 1962). the northwestern Pacific 

 (Brodsky, 1962), the central North Pacific 

 (Park, 1968), the northeast Atlantic (Grice and 

 Hulsemann, 1965), the Caribbean Sea and 



Gulf of Mexico (Park, 1970), and in the west- 

 ern Indian Ocean (De Decker and Mombeck, 

 1965; Grice and Hulsemann, 1967). In the 

 Gulf of Mexico, A. acutus is the most common 

 of all three Acfidcus species so far known to 

 occur, and it is mainly found in the upper 500 m. 



AETIDEUS GIESBRECHTI 

 CLEVE, 1904 



Male. — Body length. 1.52-1.60 mm according 

 to 50 randomly selected specimens. Propor- 



220 



