PATAGONIAN EXPEDITIONS : PALAEONTOLOGY. 



EXPLANATION OF PLATE XXXVIII. 



PAGE 



Fig. i. VERRUCA UEVIGATA Sow. 248 



Patagonian beds ; upper Rio Chalia. 



i a. Fragment of Tiirritella ambulacrum, showing three of the 



individuals of Verriica in situ. 



i b. Schematic figure, drawn from a combination of the two speci- 

 mens, which have the left scutum and tergum, fixed, 4/1. 

 ic. Scutum and tergum of latter figure, a little more enlarged. 

 Fig. 2. BALANUS cf. PSITTACUS (Mol.). ........ 249 



Patagonian beds ; Lake Pueyrredon, base. 



One of the two large specimens, from the outside. 

 Fig. 3. BALANUS VARIANS Sow. . . . . . . . . . 250 



Patagonian beds. 



3#. Upper view of an individual of form i ; Oven Point, San Julian. 

 $b. Side view of an individual of form 2; Darwin Station, San Julian. 

 $c. Side view of two individuals of form 3; Oven Point, San Julian. 

 $d. Inner view of scutum, from a colony of form 3 ; Oven Point, 



San Julian. 



3^. Inner view of tergum, from the same colony. 

 Fig. 4. BALANUS cf. TRIGONUS Darw. . . . . . . . . 252 



Cape Fairweather beds ; Cape Fairweather. 

 4#. Colony on Terebratella gigantea. 

 \b. Scutum, found in this colony. 

 4<r. The same, 4/1. 



Atd. Tergum, found in another colony. 

 4^. The same, 4/1. 

 Fig. 5. BALANUS L^VIS Brug. ......... 254 



Cape Fairweather beds ; Cape Fairweather. 

 50. Colony upon a stone. 

 5<$. Scutum, taken from this colony. 

 5^. The same, 3/1. 



$d. Tergum, taken from the same colony. 

 5*. The same, 3/1. 

 Fig. 6. GERYON (?) PERUVIANUS (d'Orb.). ....... 255 



Patagonian beds. 



6a. Upper view of carapace. Lake Pueyrredon, 600' above base. 

 6b. Lower view of a part of the body, showing large chela and 

 third maxilliped. Mt. of Observation, lower horizon. 



All of the figures, unless otherwise stated, are natural size. 



(VOL. iv) 



