fauna of that state.

Among the mammals thus far obtained are specimens of twenty species that
represent significant extensions of known range, are of especial
taxonomic or zoogeographic interest, or that complement published
information, and it is these records that are reported herein.

The following persons obtained specimens mentioned beyond: J. R. Alcorn
(1950); J. R. and A. A. Alcorn (1954 and 1955); R. H. Baker and a party
of students (1955); W. L. Cutter (1957); S. Anderson and a party of
students (1959); M. R. Lee (1960 and 1961); and J. K. Jones, Jr.,
accompanied by R. R. Patterson and R. G. Webb (1961). The Kansas
University Endowment Association and the American Heart Association
provided funds that helped to defray the cost of field operations.

In the accounts that follow, all measurements are in millimeters and all
catalogue numbers refer to the mammal collection of the Museum of
Natural History, The University of Kansas. Placenames associated with
specimens examined are indicated on the accompanying map (Fig. 1).

_Notiosorex crawfordi_ (Coues).--A non-pregnant female (75184) was
obtained on November 29, 1957, at El Fuerte by W. L. Cutter. Comparison
of this specimen with topotypes of _N. evotis_ (see below) and with
undoubted examples of _N. crawfordi_ proves our specimen to be referable
to the latter. We presume that the shrew reported as _evotis_ on
geographic grounds from El Carrizo by Hooper (1961:120) also is
referable to _crawfordi_. External measurements of our female are: total
length, 77; length of tail, 20 (tip missing); length of hind foot, 11;
length of ear from notch, 8; weight in grams, 4. Cranial measurements of
this individual are given in Table 1.

[Illustration: FIG. 1. Map of Sinaloa on which are plotted symbols
representing placenames mentioned in text. From north to south, these
are: El Fuerte; San Miguel; Los Mochis; Guam['u]chil; Terrero; Pericos;
Culiac['a]n; El Dorado; Piaxtla and Camino Re['a]l (one symbol); P['a]nuco;
Mazatl['a]n; Matat['a]n; Rosario; Escuinapa; Concepci['o]n.]

_Notiosorex evotis_ (Coues).--Four topotypes (85533-36), all males, were
collected by Lee at Mazatl['a]n. One was caught on December 17, 1960, in a
museum special trap set "in low weeds near thorn bush" in a sandy field
at the north edge of Mazatl['a]n, less than a mile from the ocean. A few
trees and some grasses grew in this area; _Mus musculus_ and
_Perognathus pernix_ were taken in the same l