4 PROCEEDESrGS OF THE NATIONAL MUSEUM vol. 105 



Family Sergestidae 

 Subfamily Sergestinae 



Sicyonella maldivensis Borradaile 



Figure 3,o 



Sicyonella maldivensis Borradaile, 1910, p. 259, pi. 16, figs. 3, 3a. — Caiman, 1914, 

 p. 258 (part), figs, a, b. — Hansen, 1919, p. 28, pi. 2, fig. 4,a-g, 



Bikini Atoll : Northeast end of lagoon at Bowditch anchorage ; sur- 

 face light at night; Apr. 23, 1946; L. P. Schultz and J. P. E. Morrison; 

 1 female. — Same; Apr. 25, 1946; L. P. Schultz; 1 male, 1 female. 



Although the petasma of the male specimen in the present collec- 

 tion has the proportions of certain of the parts slightly different from 

 those in Caiman's and Hansen's figures, the organ is structurally the 

 same. As Burkenroad (1937, p. 507) has suggested, there are prob- 

 ably local forms of the species of Sicyonella which differ from each 

 other in minor characters only. 



The male has a carapace length of 6.0 mm. (total length, about 

 22.5 mm.) ; the females have carapace lengths of 6.6 and 7.8 mm. 

 (total lengths, about 22.5 and 26.5 mm.). 



Inasmuch as the thelyca of the species of Sicyonella have not been 

 figured heretofore, this opportunity is taken to include a figure of 

 this structure from one of the Bikini specimens (fig. 3, a), as well as 

 one of a female of Sicyonella inermis (Paulson) {=S. elegans (Cai- 

 man)) (fig. 3,6) ; the latter specimen is one of two males and six 

 females collected north of Bahrein Island, Persian Gulf, by D. S. 

 Erdman in April, May, and June 1948. It will be seen from these 

 figures that the thelycum of S. inermis corresponds with Burken- 

 road's (1937, p. 508) description. That of S. maldivensis agrees in 

 general with the corresponding structures in S. inermis and differs 

 from the thelyca of the species of Sergestes in like manner. It will 

 be noted, however, that in S. maldivensis the coxal lamallae covering 

 the sperm receptacles are somewhat difl'erent in shape, the structures 

 associated with the opening of the oviduct on the coxa of the third 

 leg are unlike those in S. inermis, there is a prominent, bidentate 

 structure immediately posterior to the coxa of this leg, and there is 

 no median papiUa on the anterior part of the 13th sternite as there 

 is in S. inermis. 



Subfamily Luciferinae 



Lucifer faxoni Borradaile 



Lucifer faxoni Borradaile, 1915, p. 228. — Hansen, 1919, p. 61, pi. 5, fig. 3,a-i. 



Rongelap Atoll: One-half mile off Yugui Island in 13 fathoms; 

 surface light at night; July 30, 1946; E. S. Herald; 3 males. 



