A specimen of this species from Matamoros and several from Brownsville, Texas, have been assigned by Hall (1951:43) to _L. c. merriami_. Specimens from Padre Island, Texas, reportedly resemble _L. c. curti_ in smallness of the tympanic bullae but are in other characters referable to _L. c. merriami_ (Hall, 1951:44).
=_Spermophilus spilosoma annectens_= (Merriam): Spotted Ground Squirrel.--These squirrels were moderately common in dunes at both camps. They were heard calling, and many tracks and holes were seen. On July 7, at Camp 1, a lactating, adult female (89020) and two dependent juveniles (89021, skull only, 89022, skin and skull) were shot at the entrance of a burrow; the uterus of the adult showed six placental scars.
Our adult specimen has been compared with ten specimens obtained by Hall and von Wedel at Eighth Pass in March, 1950; ours differs from the ten in being paler and slightly larger. The pallor is perhaps attributable to seasonal variation, and the size (246-79-38-7; weight, 133 gm.) is within limits that would be expected in a larger series of the population sampled by Hall and von Wedel. Hall (1951:38) referred specimens of this squirrel from Eighth Pass to _S. s. annectens_.
=_Geomys personatus personatus_= True: Texas Pocket Gopher.--This pocket gopher was abundant on low, stabilized dunes on the barrier island from four to 73 miles south of Washington Beach. One of us (Wilks) made a trip down the beach on May 20 and 21, 1961, and collected specimens at localities four miles south and 33 miles south of Washington Beach; additional specimens were taken at both Camp 1 and Camp 2 from July 6 to 10. At these localities the gophers seemed to maintain population densities approximating those of _G. personatus_ on Padre and Mustang islands on the Texan coast.
There is but one other record of the Texas Pocket Gopher from México. Goldman (1915) described _G. p. tropicalis_ from Altamira on the basis of specimens collected in 1898. Since that time, the species has not been reported as occurring south of Cameron County, Texas (Kennerly, 1954), some 50 miles northwest of the closest station of occurrence of the gophers on the barrier beach of Tamaulipas.
Our specimens are slightly smaller than _G. p. personatus_ and slightly larger than _G. p. megapotamus_, the subspecies of nearest geographic occurrence to the barrier island. The degree to which our specimens differ in other respects, such as configuration of the pterygoid, is being studied further by Wilks. For the present, reference of our material to the nominate subspecies best expresses the relationships of these coastal gophers.