718 DEEP WATER MOLL USES AND BBACHIOFODS—DALL. voL.xvn. 



the hardly visible muscular impressions, whicli are all above the lower 

 end of tlie septum; armature of the hinge diminutive and feeble; teeth 

 strong for their size, with very short sockets behind them; crural lam- 

 mse concave, the crura short, thin, spatuliform, with their broad sides 

 parallel with the antero-i)osterior plane of the shell, their distal ends 

 broader, rounded, not denticulate; the crura are separated clear to the 

 cardinal margin ; there is no obvious cardinal process. Length of shell, 

 16; width, 14; anteroposterior diameter, 9.25 mm. 



Station 3362, in 1175 fathoms, mud, oft' Cocos Island, Gulf of Panama; 

 bottom temperature 36.8° F. No. 122861, U.S.N.M. 



A single specimen of this modest little species was obtained. The 

 only species with which it need be compared is RhynchoneUa cornea., 

 Fischer, which is regularly finely striated and has a more angular out- 

 line and less flexuosity at the base. The minor details of the crural 

 plates and crura are also different. Hemithyris hicida is much more 

 flexuous in front than the present species. In short, although its char- 

 acteristics are in no respect striking, this little form can not be united 

 with any other yet described. It is respectfully dedicated to Miss 

 Agnes Crane, the editor of Dr. Davidson's posthumous papers on 

 Brachiopoda, to whose care and energy the students of Brachiopoda 

 are much indebted. 



Family Terebratulid^. 

 Subfamily Terebratulin^. 



Genus TEREBRATULA (Llhwyd) Auctomm. 

 Subgeuiis LiOTiiVRiNA, O e h 1 e r t . 

 LIOTHYRINA CLARKKANA, new species. 

 Plate XXXI, figs. 9, 10. 



Shell small, thin, perfectly smooth, polished, of a very pale translu- 

 cent straw color, rather convex, of suboval outline, conspicuously punc- 

 tate ; pedicle valve with a short beak and rather large not quite 

 complete foramen, on either side of which is a wide, subtriangular del- 

 tidial area ; the inner slopes of these triangles form the lower edge of 

 the foramen, their bases the cardinal border, their inner angles nearly 

 touch and are united by a cartilaginous deposit ; teeth short, strong ; 

 cardinal border arched ; sides rounding evenly into the rounded basal 

 margin which recedes slightly from the plane of the lateral margins, but 

 is not tiexuous ; cavity of the valve without any septum, the muscular 

 impressions not conspicuous, situated in the upper fifth of the valve ; 

 brachial valve flatter, with a minute but distinct cardinal process, 

 strong teeth and small short incomplete loop ; in the cavity of the 

 valve is a very feeble elevated line which may be regarded as a median 

 septum, but which does not reach the apex of the valve and extends 

 forward only as far as the adductors. Height of the shell, 12; width, 

 10 ; diameter, 6 mm. 



I 



