28 



SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1S)19. 



Station 1 (7G23). Mine on submarine beach 30 feet below 

 ])resent sea level, half a mile northwest of Nome. Col- 

 lected by E.M. KindleandP. S.Smith, 1908. Pliocene. 

 Cardium ciliatum Fabricius. 

 Venericardia crassicostata Krause. 

 Astarte hemicymata Dall. 

 *Astarte (Gonilia?) diversa Dall. 

 Macoma balthica Linne. 

 *Mya sp. (aff. M. japonica Jay). 

 Chrysodomus sp. (fragment). 

 Balanus sp. (fragment). 

 Station 3 (7624). Prospect hole half a mile northwest of 

 Nome, on submarine beach. Collected by E. M. 

 Kindle, 1908. Pleistocene (?). 

 Astarte fabula Reeve. 

 Station 7477. Dump of shift 80 feet deep on the tundra 

 between Dry and Bourbon creeks 1 mile from beach at 

 Nome. Collected by F. L. Hess, 1905. Pliocene. 

 Admete sp.? (fragment). 

 Chrysodomus sp. (fragment). 

 *Tachyrhynchus lacteola Carpenter. 

 *Pecten (Chlamys) n. sp. (fragment). Southern type. 

 Pecten (Chlamys) islandicus Miiller. 

 Astarte sp. (fragment). 

 Astarte hemicymata Dall. 

 *Astarte diversa Dall. 

 Astarte arctica Gray. 

 Serripes gronlandicus Gmelin. 

 Cardium ciliatiun Fabricius. 

 Venericardia paucicostata Krause. 

 Macoma calcarea Gmelin. 

 *Mya (n. sp.?) (fragment). 

 Saxicava arctica Linne. 

 Balanus rostratus alaskanus Pilsbry. 

 Myriozoum "truncatum Pallas" (n. sp.?). 



DESCRIPTIONS OF NEW SPECIES. 

 GASTROPODA. 

 Antiplanes? cf. A. purpurea Dall. 



A decorticated specimen of about six whorls 

 presents the appearance of an Antiplanes of 

 the type of A, purpurea Dall. It is in a state 

 too dilapidated to serve as the basis of a de- 

 scription but is worthy of mention as an indi- 

 cation of the probable presence of this genus in 

 the fauna. 



Station 7069, in the Pliocene, horizon B, 80 

 feet below horizon A, and about 300 feet east 

 of station 7068. U. S. Nat. Mus. catalogue 

 No. 324316. It is about a mile from the Arc- 

 tic coast in the Camden Bay region ; the ma- 

 trix appears to be a hardly consolidated ash. 

 There is a possibility that the specimen may 

 represent a broken and decorticated Coins. 



Chrysodomus mesleri Dall, n. sp. 



Plate V, figures 2, 3. 



A fragment only of this species was obtained, 

 but its characteristics are so pronounced that 



it can not fail to be recognized when better 

 specimens are found. The shell had more 

 than four whorls, with a smooth surface and an 

 appressed suture strongly undulated by the 

 ribbing; the penultimate whorl has seven ex- 

 tremely strong protractively angular axial ribs, 

 projecting as stout knobs at the shoulder, 

 which are connected by an obscure spiral 

 ridge; the interspaces are deep and about as 

 wide as the ribs ; on the upper whorls the series 

 of knobs develop into a continuous broad un- 

 dulating spiral ridge and the ribs disappear; 

 the last whorl is deficient, but the remaining 

 portion indicates that it was ribbed, at any 

 rate near the suture. Height of the penulti- 

 mate whorl, 25 millimeters; diameter, 36 milli- 

 meters. 



Station 7619 (18a). Pliocene. From the 

 Center Creek nunes, 2 miles north of Nome. 

 Collected by E. M. Kindle and R. D. Mesler, 

 1908. U. S. Nat. Mus. catalogue No. 324317. 



The species perhaps nearest allied to this, 

 though sufficiently distinct, is C. saturus Mar- 

 tyii, of the Recent fauna of Bering Sea. 



A fragment (fig. 3) from station 5074 (18a) 

 at Center Creek, 1\ miles north of Nome, from 

 the second beach, is probably of the same 

 species and indicates that the ribs reached 

 over the last whorl clear to the beginning of 

 the twisted and recurved canal. 



Chrysodomus leflBngwelli Dall, n. sp. 



Plate V, figure 11. 



Shell of moderate size, with more than four 

 rounded whorls (apex decollate) separated by 

 a distinct, deep, but not channeled suture; 

 whorls widest at the shoulder; spiral sculpture 

 of (between the sutures three, on the last 

 whorl about 14) strong, somewhat flattened 

 cords regularly spaced and separated by wider 

 channeled interspaces in which run from one to 

 tliree minor cords which, toward the canal, 

 may be absent; axial sculpture of (on the last 

 whorl eight or nine) rather narrow, not very 

 prominent sigmoid ribs extending from the 

 suture over the body and becoming obsolete on 

 the base; these ribs are less distinct on the 

 spire, and the surface also bears fine, close-set 

 incremental lines; pillar twisted, inner Hp 

 slightly erased; canal moderately long with a 

 very feeble siphonal f asciole, slightly recurved ; 

 outer lip defective in the specimen. Height 

 of (decollate) three whorls, 74 millimeters; 



