1894. PROCEEDINGS OF THE NATIONAL MUSEUM. 715 



reaches the median line above the septum, to which and to each other 

 the laminae are solidly attached, forming a narrow spoiidylium. The 

 front edge of the spondylium is indented niesially and there is an 

 impressed mesial line extending- upward, on each side of which, in old 

 specimens, the laminte are made prominent by a callous deposit. 

 Behind the spondylinm the attached surface of the sej^tum is widened, 

 so as to support part of each lamina as well as their line of junction. 

 On either side of the septum, between it and the supporting dental 

 lamina, a pointed recess extends below the spondylinm toward the 

 cardinal margin. The surface of this valve, like that of the other, is too 

 polished to retain much of the muscular imjiressions. The muscles, 

 however, are inserted on each side of the septum and above its lower 

 end, much as in H. psittacea. An average specimen measures 17 mm. 

 high, 16 mm. wide, and about 10 mm. in antero- posterior diameter. 



Stations 2871, 2919, 2923, and 2929, in 559, 984, 822, and 623 fathoms, 

 from latitude 47°, off Grays Harbor, Washington, to the Pacific Ocean 

 off San Diego, Cal., on a bottom of fine mud and sand, attached to 

 dead Echinus spines. Bottom temperature 38° to 39° F. No. 123148, 

 U.S.KM. 



The species is named in honor of Prof. James Hall, State geologist 

 of i>rew York, whose contributions to our knowledge of the brachiopoda 

 are second in importance only to those of the late Thomas Davidson. 

 The name which I have adopted for the genus is given in honor of 

 Herman Friele, esq., of Bergen, Norway, to whom we owe the proof 

 of the remarkable features which characterize the development of the 

 long looped Terebratuloids. 



The anatomy of Frieleia when compared with that of Hcmithyris 

 presents few essential points of difference. The brachia are very deli- 

 cate and make only about four turns. The base upon which they are 

 inserted is circular, forming, when dilated, a cylindrical tube. Thecirrhi 

 alternate, as in Hcmithyris. The number of coils is about four, which 

 is very much fewer than in H. psiUacea. The attachments of the mus- 

 cles are relatively much the same in the two groups, but iu Frieleia the 

 muscles are smaller and their points of insertion on the body of the 

 valve rather posterior, none exceeding the limit indicated by the iioint 

 of the septum. The ovaries recall those of R. psiitacea, but are less 

 extensive. They are of a yellowish-white color. The nephridia are 

 four iu number, situated essentially as in Hemiihyris^ but more delicate, 

 smaller, and paler than in H. psiitaeea. The end of the intestine forms 

 a small bulb, slightly inclined to one side, but not as lax or as large as 

 in n. psiitaeea. The blood sinuses are quite narrow, but in general dis- 

 tributed much as in the last-mentioned form. The mantle edge is very 

 thin, very sparsely furnished with short setie, which appear perfectly 

 smooth, transparent, and very sharply pointed, but under a high power 

 show regular transverse markings. The peduncle is short and of a 

 brownish color. There were several of the specimens dredged alive 



