MUSEUM OF COMPAEATIVE ZOOLOGY. 107 



right angles to the rest of the plate, but here represented as compressed 



nearly to the plane of the plate. 

 Fig. 8. Amalopenceus clegans. Diagrammatic sketch of the left side of the carapax 



and anterior appendages of a female from Station 328, enlarged about 



two diameters. 

 " 9. Mandibular palpus of the left side of the same specimen, seen from beneath, 



enlarged eight diameters. 

 " 10. Endognath of the first maxilla of the left side of the same specimen, seen 



from beneath, enlarged eight diameters. 

 " 11. Second maxilla of the left side of the same specimen, seen from beneath, 



enlarged eight diameters. 

 " 12. Outline of the antennal scale of the left side of the same specimen, seen 



from above, enlarged nearly four diameters. 

 " 13. Appendage (petasma) of the protopod of the appendage of the left side of 



the first somite of a male from Station 324, seen from in front, enlarged 



twelve diameters ; a, process below the base; b, process between the 



middle and inner or distal parts of the plate, and which turns readily 



either in or out. 

 " 14. Same appendage from a specimen from Station 330, seen in the same 



position, enlarged twelve diameters ; a, b, as in Fig. 13. 



PLATE XV. 



Fig. 1. Amalopenceus elegans. First chelate leg of the right side of the female 



figured on Plate XIV. fig. 8, enlarged about eight diameters. 

 " 2. Second chelate leg of the left side of the same specimen, enlarged about 



eight diameters. 

 " 3. First maxilliped of the left side of the same specimen, seen from beneath, 



enlarged eight diameters. 

 " 4. Second maxilliped of the left side of the same specimen, seen from beneath, 



enlarged eight diameters. 

 " 5. External maxilliped of the left side of the same specimen, enlarged four 



diameters. 

 " 5*. Distal extremity of the same maxilliped, enlarged twenty-four diameters. 

 " 6. Hymenopenceus debilis. Diagrammatic sketch of the left side of the cara- 

 pax and anterior appendages of a female from Station 323, enlarged 



about two diameters. 

 " 7. First maxilliped of the left side of a female from Station 326, seen from 



beneath, enlarged eight diameters. 

 " 8. Second maxilliped of the left side of the same specimen, seen from beneath, 



enlarged eight diameters. 

 " 9. External maxilliped of the left side of the same specimen, enlarged four 



diameters. 

 " 10, First chelate leg of the right side of the same specimen, enlarged four 



diameters. 

 " 11. Distal part of the third chelate leg of the right side of the same specimen, 



enlarged four diameters. 



