562 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



9S. GENUS BOPYRISCUS, new genus. 



Very close to J\'ohopyrux. 



First four segments of abdomen distinct in female; last two seg- 

 ments fused. Pleopods consist of live pairs of 

 doul)le-branched lamelhw Uropoda absent. Dis- 

 tal segment of first lamelhe of marsupium pro- 

 duced in a small lobe. 



Male with tirst three segments of abdomen 

 distinct; last three fused in the terminal piece, 

 which is trilobate. Uropoda absent. 



BOPYRISCUS CALMANI, new species. 



Body somewhat asymmetrical, turned more or 

 less to one side, which is shorter than the other 

 side; longer than wide, 5 mm.: 3 mm. 



Head deeply set in thorax, wider than long, 

 with the front nearly straight or but slightly 

 rounded, and the antero-lateral angles acute. 

 Eye;-i are present in the 

 form of black pigment. 

 The tirst pair of antenna' 

 are small and are composed 

 of three articles. The 

 second pair are also small, 

 and composed of only a 

 few iirticles. 

 The seven segments of the thorax are distinct 

 of the tirst four are bilobate; the lateral margins of the last three are 

 straight. Ovarian bosses are faintly indicated on the iirst four'seg- 

 ments where they occupy the anterior part of the lat- 

 eral margin. Lateral to them are the narrow epimeral 

 plates, which are but faintly indicated. 



The tirst four segments of the abdomen are distinct, 

 being separated by faint lines; the last two segments 

 are fused, the line separating them being obliterated. 



There are no uropoda. The pleopoda consist of live 

 pairs of double-branched, small rounded lamella'. 



There are live pairs of incul)atory lamell;i> that do not 

 completely inclose the incubatory pouch. The tii'st pair 

 have the distal segment produced at the extremity in a 

 small lobe. 



The male has the frontal margin of the head rounded. 

 E3'es distinct, situated near the posterior margin. All seven segments 

 of the thorax distinct. The first three seofments of the abdomen are 



Flii. (317.— BOPYRISCUS CAL- 

 MANI. a, Female, x 

 11§. 6, First incuba- 

 tory LAMELLA. X 33. 



Fig. 618.— Bopyrlscus cal- 

 MANi. First pleopod. 

 Fkmale. v. 77^. 



The lateral margins 



Fig. 619. — Bopy 

 Riscus calm a 

 Ni. Male. > 

 ■.V.>. 



