76 BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



Prairie mesquite, Prosopis glandulosa Torrey. 



Texas redbud, Cercis reniformis Engelmann. 



Coral-bean. Frijolito. "Laurel," Sophora secundiHora (Cava- 

 niltes) de CandoUe. 



Texas buckeye, Ungnadia speciosa Endlicher. 



Wild china, Sapindus marginatus Willdenow. 



Mexican persimmon, Brayodendron texanum (Scheele) Small. 



The following half -wild species of trees, introduced from other 

 Jocalities, were common: .;, 



Cedar, ChamcBcyparis. 



Fig, Ficus. 



Umbrella china tree, Melia azedarach v/rnbraculifera Sargent. 



Desert willow, Chilopsis linearis (Cavanilles) Sweet. 



Beautiful csesalpinia, Poinciana pulcherrima Linnseus. 



The plants which make up the bulk of the chaparral and the 

 thickets along streams are the Texas barberry {Berheris trifoliata 

 Moricand) , the blackberry {Rubus sp.) , the green-bark acacia {Cercid- 

 ium texanum Gray), the true acacias (Acacia amentacea de Can- 

 doUe, A. herlandieri Bentham, A. roemeriana Schlechtendal) , the 

 Texas colubrina [Gohibrina texensis Gray), several species of sumach' 

 (Rhus trilohata Nuttall, R. microphylla Englemann, etc.), and the 

 button-bush (C ephalanthus occidentalis Linnaeus), with which are 

 often associated the Texas fog- fruit (Lippia ligustrina Britton), 

 blazing star (Lacinaria), and horse nettle (Solanum carolinense 

 Linnseus). Vines of many kinds mkke canopies over the smaller 

 streams, and in open spaces the " calabazilla " or wild pumpkin (Gu- 

 curbita fwtidissima Humboldt, Bonpland, and Kunth) is abundant, 

 Spanish bayonet, soapweed (Yucca glauca Nuttall), and spotted 

 agave (Agave maculosa Hooker) cover much of the dry plains, in 

 company with shrubs and members of the cactus family, which 

 include, besides an abundance of prickly pears and Cylindropuntias, 

 Cactus stellatus texanus (Engelmann), Cereus (Echinocereus) cces- 

 pitosus Engelmann and Gray, and other species of Echinocereus and 

 several species of the hedgehog-cactus (Echinocactus horizontha- 

 lonius, E. setispinus, and E. hamatocanthus longihamatus) . 



The fauna of this station is rich. Crustaceans, fishes, birds, and 

 mammals are abundant. The reptilian fauna is more varied than at 

 any other station occupied by us. Turtles are numerous in species. 

 Alligator mississippiensis Daudin has once been taken about 32 km. 

 (20 miles) south of Fort Clark, and the species is said to exist in 

 lagoons of the Eio Grande a short distance to the eastward. Lizards 

 are abundant. Among those collected are the horned toad (Phryn- 

 osoma comutum) and Liolepisma laterale (Say). The banks, pools, 

 and streams swarm with aquatic reptiles; on land the bead snake 



