. Contributions to a monograph of the Amphipoda Hyperiidea. Hyperiidea. 294 CARL BOVALLIUS, AMPHIPODA HYPEKIIDEA. I. 2. I1YPEIUID7E. 2. EUTHEMISTO ANTARCTICA, J. D. DANA, lliemisto antarctica, Dana. Facsimile from Dana. U. S. Expl. Exp. Crust., pi. 69, fig. 1. Fig. 1. The animal from the side. 2. The first pair of antennae. 3. The second pair. Themisto antarctica, Dana. Facsimile from Batk. Cat. Amph. Crust. Brit. Museum, pi. 50, fig. 8. Fig. 4. The animal from the side. 5. The first pair of perseopoda. 6. The second pair. Themisto Gueri?iii, Spence Bate. Facsimile from Spence B
. Contributions to a monograph of the Amphipoda Hyperiidea. Hyperiidea. 294 CARL BOVALLIUS, AMPHIPODA HYPEKIIDEA. I. 2. I1YPEIUID7E. 2. EUTHEMISTO ANTARCTICA, J. D. DANA, lliemisto antarctica, Dana. Facsimile from Dana. U. S. Expl. Exp. Crust., pi. 69, fig. 1. Fig. 1. The animal from the side. 2. The first pair of antennae. 3. The second pair. Themisto antarctica, Dana. Facsimile from Batk. Cat. Amph. Crust. Brit. Museum, pi. 50, fig. 8. Fig. 4. The animal from the side. 5. The first pair of perseopoda. 6. The second pair. Themisto Gueri?iii, Spence Bate. Facsimile from Spence Bate. Cat. Amph. Crust. Brit. Museum, pi. 50, fig. 9. Fig. 7. The animal from the side. 8. The first pair of antennae. 9. The first pair of peraeopoda. 10. The second pair. Diagn. Corpus carinatum. Femur pedum percei parium trium ultiniorum modice dilatatum, plus quam duplo longius quam latius. Tibia pedum quihti paris quani genu duplo longior, post pro- ducts, processum formans diniidio stipitis articuli multo breviorem; dactylus levis. Pedes uri priiui paris pedes secundi paris superantes; pedunculus ramo interno longior; ramus externus pedum secundi ac tertii parium ramo interno paullo brevior. Telson dimidio seg- menti ultimi uri paullo longius, peduncular!) pedum uri ultimi paris latitudine asquans, ac quarta parte longitudinis pedunculi ejusdem brevior. The body is carinated. The femur of the last three pairs of peraiopoda is moderately dilated, being more than twice as long as broad. The tibia of the fifth pair is twice as long as the genu; the lower hind corner is produced into a process, which is much shorter than half the rest of the joint; the dactylus is smooth. The first pair of uropoda reach beyond the apex of the second pair; the peduncle is longer than the inner ramus; the outer ramus of the second and third pairs is a little shorter than the inner. The telson is a little more than half as long as the last ural segment; it is as broad, and less than a fourth part
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