520 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



head; in the larger thoracic epimera (pleural plates); in the differently 

 shaped ovarian bosses; in the smaller and differently shaped abdom- 

 inal epirnera, which do not conceal the abdominal segments dorsally 

 as in that species; in the differently shaped carina on the basis of all 

 the legs; in the absence of the sinuous lateral margins of the abdomen 

 of the male; and in the broader apex and greater length compared 

 with the width of the abdomen of the male. 



86. Genus CRYPTIONE Hansen. 



Body of female somewhat asymmetrical. 



Ovarian bosses present on the first four thoracic segments. Epimera 

 well developed and distinct on the first four segments, occupying 

 the anterior portion of the lateral margin ; those of the last three seg- 

 ments are not distinct from the segments. 



Segments of the abdomen distinct; the lateral parts of the first five 

 segments are well developed; the sixth or terminal segment is small 

 and has the lateral parts not developed. 



The uropoda are simple, single-branched, and consist of a pair of 

 elongated lamellae. 



The pleopoda consist of five pairs of double-branched lamellae. 



There are five pairs of incubatory lamellae which do not completely 

 inclose the incubatory pouch. 



All seven pairs of legs are present. 



The male has all seven segments of the thorax distinct. 



The segments of the abdomen are also distinct. The sixth or ter- 

 minal segment has the post-lateral angles produced backward on 

 either side. 



There are five pairs of simple sac-like pleopoda. 



Branchial parasites. 



CRYPTIONE ELONGATA Hansen. 



Cryptione elongata HANSEN, Bull. Mus. Comp. Zool., Harvard College, XXXI, 

 1897, pp. 112-115, pi. in, figs. 5-5a; pi. iv, figs. 1-lg. RICHARDSON, Proc. 

 U. S. Nat. Mus., XXI, 1899, p. 869; Ann. Mag. Nat. Hist. (7), IV, 1899, p. 

 338. BONNIER, Trav. de la Station Zool. de Wimereux, VIII, 1900, pp. 285- 

 287. RICHARDSON, Proc. U. S. Nat. Mus., XXVII, 1904, p. 87. 



Locality. Near the Galapagos Islands on Nematocardnus agassizii 

 Faxon, which occurs as far north as Acapulco, Mexico. 



Body of female somewhat elongated, asymmetrical. Length 19 

 mm.: width 11 mm. 



Head a little wider than long, 4 mm.: 5 mm., with the anterior and 

 posterior margins widely rounded or arcuate, and the lateral margins 

 produced in a small lobe on either side about the middle. Eyes absent. 

 The first pair of antennae are composed of three articles, the last of 



