562 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



95. GENUS BOPYR1SCUS, new genus. 



Very close to Probopyrux. 



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

 ments fused. Pleopods consist of five pairs of 

 double-branched lamella. Uropoda absent. Dis- 

 tal segment of first lamella? of marsupium pro- 

 duced in a small lobe. 



Male with first 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. 

 Eyes are present in the 

 form of black pigment. 

 The first pair of antennae 

 are small and are composed 

 of three articles. The 

 second pair are also small, 

 and composed of only a 

 few articles. 



The seven segments of the thorax are distinct, 

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

 straight. Ovarian bosses are faintly indicated on the first 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 first 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 five 

 pairs of double-branched, small rounded lamellae. 



There are five pairs of incubatory lamellae that do not 

 completely inclose the incubatory pouch. The first pair 

 have the distal segment produced at the extremity in a 

 small lobe. 



The male has the frontal margin of the head rounded. 

 Eyes distinct, situated near the posterior margin. All seven segments 

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



FIG. 617. BOPYRISCUS CAL- 

 MANI. a, FEMALE, x 

 llf. 6, FIRST INCUBA- 

 TORY LAMELLA. X 33. 



FIG. 618. BOPYRISCUS CAL- 

 MANI. FIRST PLEOPOD. 

 FEMALE, x 77i. 



The lateral margins 



FIG. 619. BOPY- 

 RISCUS CALMA- 

 NI. MALE, x 

 39. 



