44 



PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvir. 



Fig. 18.— First la 

 mella op mar- 

 SUPIUM OF Para- 



PENNON CON 

 SOLIDATA. X 10 



pleural plates of the segments. (Hansen so considers the posterior 

 lobes of the corresponding thoracic segments in his genus Cryptwne.Y 

 ]n the two following segments the pleural plates are of 

 this character, except that on one side of the bod}- the 

 anterior portion is greatlv reduced and almost incon- 

 spicuous. The pleural plates in the three following 

 segments are not divided by a furrow^ into anterior and 

 posterior portions, but extend entire along the whole 

 of the lateral margin of the segments. The ovarian 

 bosses are prominent and well developed on the first 

 four segments. 



The segments of the abdomen are all distinct, with the lateral por- 

 tions of the first five produced into plates, the first two of which on 

 one side are turned upward. These plates are not 

 distinctly separated from the segments. The sixth or 

 terminal segment is minute and rounded and without 

 pleural plates. The uropoda are a pair of small single- 

 branched lamellae attached to the terminal abdominal 

 segment. The pleopoda consists of five pairs of doul)le- 

 branched lamellte (ten on either side), the surfaces of 

 which are closely and densely covered with small 

 rounded knobs, supposed to indicate rudimentary 

 ramification. 



The marsupium consists of five pairs of large smooth 

 plates, over-lapping in the ventral median line. 



The basis of all the legs is furnished with a high 

 Descri/ption of male. — Body elongate. Head large, rounded. Eyes 

 absent. Seven thoracic segments distinct, with lateral margins 

 rounded. Abdomen all in one piece, the six segments not 

 indicated in any way on the dorsal side or lateral margins. 

 Shape of abdomen triangular, with apex rounded. Pleo- 

 pods neither developed nor in a rudimentary condition on 

 the ventral side. 



One female, with its male, was collected by Dr. F. C. 

 Dale, U. S. Navy, on the U. S. S. Palos^ at Mogi, Japan. 

 It was found on Pampenseus dalel Kathbun. 



The female of this species bears a great resemblance to 

 the female of Crypt! on e elongata Hansen. The male 

 ditiers, however, in having the segments of the abdomen 

 all consolidated and forming a single piece, the male of 

 Hansen's type species of the genus Cn/pttone having the 

 abdomen distinctly segmented, each segment bearing a 

 pair of rudimentary pleopoda, and the terminal segment 

 provided with uropoda. 



Type.—Q2Lt. No. 29087, U.S.N.M. 



«Bull. Mus. Comp. Zool. at Harvard College, XXXI, No. 5, Pt. 22, 1897, p. 113. 



Fig. 19.— Leg of 

 .sixth pair of 

 adult female of 

 parapen.eon con- 

 solidata. x 39. 



carina. 



Fig. 20.— Male 

 OF Parapen- 



^ON CONSOLI- 

 DATA. X 41. 



