34
SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL. 57
| DESCRIPTION OF PLATE 4 | ||||
| PAGE | ||||
| Sidneyia inexpectans Walcott | 24 | |||
| Fig. | 1. | Outer portion of the third pair of appendages of the cephalo-thorax (✕ 2). In this there appears to have been a somewhat different development of parts as compared with those seen in figs. 3 and 4. U. S. National Museum, Catalogue No. 57490. | ||
| 2. | Another form of the outward extension of one of the third pair of appendages of the cephalo-thorax (✕ 2). This type reaches a very large size; one has a length of 65 mm. U. S. National Museum, Catalogue No. 57491. | |||
| 3. | Outer extension of a part of one of the outer portions of the compound chelate termination of a third appendage (✕ 2). The anterior arm, as shown in figs. 1 and 4, is broken away. U. S. National Museum, Catalogue No. 57492. | |||
| 4. | Outer portion of one of the third pair of appendages of the cephalo-thorax, showing on the jointed primary appendage large, elongated spines with spinose fringes and a short, jointed appendage attached to the posterior outer side of the gnathobase. ✕ 2. U. S. National Museum, Catalogue No. 57493. | |||
