PACKARD.] PHYLLOPODS OF NOETH AMERICA. 305 



teeth, and about 8 mucli larger than the others, while the long acute 

 caudal appendages are peculiar from having but about 4 long spines 

 on the base of upper edge, with no fine teeth. 



The hands of the males show no specific characters of decided im- 

 portance. 



Length of shell, 16 ^'^; breadth, 10 ™"; thickness, 4™"; 



California (Eowell) Mus. Chicago Acad. Sc. 4 specimens; Alameda 

 County, Cal. (James Behrens), Santa Cruz, Cal., collected by Laura 

 F. Hicox, received through Mr. J. S. Kingsley. 



It is closely allied in form to JE. ticinensis of Lombardy, Italy, and 

 may be said to represent that species in the Californian fauua. A de- 

 tailed account of the exterual anatomy of this interesting species is 

 given in " Estheria Californica Pack. Inaugural dissertation," &c., by 

 H. Lenz, wherein the mouth-parts and appendages, &c., are figured. Of 

 25 specimens Lenz received from Mr. Behrens 11 were males and 14 were 

 females. 



From the next species, E. newcomhii, it appears to diifer in the less 

 prominent beaks, in the fact that the dorsal edge of the carapace does not 

 slope directly down to the posterior extremity, which is not "nearly as 

 broad as anterior extremity"; and there are 18 lines of growth, instead 

 of " about sixteen," as in Baird's species, and the punctations of the 

 shell are separate. Still it may be found that our species is synony- 

 mous with Baird's newcomhii. I have been unable to see the plates, as 

 in the copy of the Proceedings of the Zool. Soc. at hand the plates are 

 wanting. 



Estheria newcombii Baird. 



Esthma newconibil Baird. Proc. Zool. Soc, London, 122, PI. XII, fig. 2, 1866, 



" Carapace oval in shape. Beaks prominent, placed near anterior ex- 

 tremity. The dorsal margin slopes directly down to the posterior ex- 

 tremity, which is nearly as broad as anterior extremity. Eibs of 

 carapace, about sixteen in number, narrower at the beaks, and becoming 

 broader as they descend towards the ventral margin. The intervals of 

 the ribs are dotted with punctations, which are small and very numer- 

 ous, and run into each other so as to produce a sort of running pattern." 

 "Length nearly ^ inch; breadth about | inch." 

 '"''Rah. — California (W. Kewcombe, esq., Mus. Brit.)." 



Estheria compleximanus, n. sp. 



Plates V, figs. 1-7 ; XXIV, figs. 8, 10; XXV, fig. 6. 



EuUmnadia compleximamis Pack., Bull. U. S. Geol. Survey III, No. 1, 174, April 9, 1877, 

 Zoology for Colleges and High Schools, 1st and 2d editions (no description) 

 fig. on p. 302, 1879, 1880. 



Shell very long, oblong, not very thick compared with the following 

 species; the beaks very small, situated at the anterior sixth or seventh 

 of the dorsal edge of the shell, this edge being remarkably long and 

 straight, more so than in any of the other species. The posterior end 

 of the shell is narrow, not full and rounded, neither is the anterior end 

 as full as in U. californica. About 15 lines of growth. Head with the 

 rostrum rather long, approaching jEJ. mexicana in this respect. Edge of 

 shell with small short spines, and between the lines of growth confluent 

 spaces arranged in oblique parallel lines. 1st antennae long and slen- 

 der, reaching beyond the lower edge of the shell, the sense papillte very 

 20 H 



