138 BULLETIN 138, UNITED STATES NATIONAL MUSEUM 



intermediate, lateral and marginal ; those of the submedian and inter- 

 mediate pairs parallel, those of the lateral and marginal pairs in- 

 clined inward posteriorly. The median carina or crest of the telson 

 is strong, the carinae of the next or lateral pair converge strongly 

 posteriorly. The margin of the telson is so deficient that one can 

 not make out the carina or the terminal denticles. 



Measurements. — Length of abdominal segments beginning with the 

 first: 11.2, 10.7, 10.7, 11.3, 13.6, 9, 17 mm. (telson). Width of abdo- 

 men at fourth segment 31.7 mm. 



Occurrence. — California : Adelaide Quadrangle, central part about 

 six miles west of Templeton, San Luis Obispo County; Monterey 

 shales, middle Miocene series; one specimen showing the seven seg- 

 ments of the abdomen. Holotype in the University of California. 



Relation. — In its size and general features this species approaches 

 the Recent P. higeloivi ^^ from off the coast of southern California. 



BIBLIOGRAPHY 



1849. Dana, James D. United States Exploring Expedition. During tlie years 

 1838, 1839, 1840, 1S41. 1842. Under the command of Charles Wilkes, 

 U. S. N. Geology. Not dated [published 1849]. 



A new fossil crustacean described, Callianassa oregonensis, from the 

 Miocene, p. 722, atlas, pi. 17, fig. 3. 

 1864. Gabb, W. M. Description of the Cretaceous Fossils. Geological Survey 

 of California. Palaeontology. Vol. 1. Section 4. 



Callianassa stwipsonii, new species, described (p. 57) and figured 

 (pi. 9, fig. la-c). Types not extant. Impossible to identify figures, or 

 to assign to Cretaceous or Eocene. 

 1867. . On the Subdivisions of the Cretaceous Formation in Cali- 

 fornia. Proc. California Acad. Nat. Sci., vol. 3, 1866, pp. 301-306. 



Lists Callianassa stimpsonii from both upper and lower Divisions of 

 the Cretaceous, so-called. 



1869. . Cretaceous and Tertiary Fossils. Geological Survey of 



California. Palaeontology. Vol. 2. 



Cancer brewer ii, new species, described (p. 1) and figured (pi. 1, 

 fig. 1). Pliocene. Synonymous with Caricer productus Randall. 



Crab carapace (p. 127), figured (pi. 19, fig. 1). 



Shrimp, fragments of claws (p. 127, pi. 19, fig. 2-2?;). 



Callianassa stimpsonii Gabb 1864 (p. 127, pi. 19, fig. 3). Corrected 

 figure of palm. 



The last three are said to be Cretaceous and have not since been 

 identified. 

 1871. Cope, E. D. On three extinct Astaci from the Fresh-Water Territory of 

 Idaho. Proc. Amer. Philos. Soc, vol. 11, 1870, pp. 605-608. 



Describes three new species of Astacus. 



«» Gonodactylu-fi styliferm Mihie Edwards, Hist. Nat. Crust., vol. 2, 1837, p. 530. pi. 27. 

 figs. 9-14, not PseiidosquiUa stylifcra (Lamarck, 1818) Dana. PseudosqrdUa bigelowi 

 Uathbun, Proc. U. S. Nat. Mus., vol. 38, 1910, p. 608. 



