364 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



Crania is rare in North American waters, and 

 only a few specimens of this species are known. 

 It forms a low cone attached to corals or masses 

 of rock. The color is pale yellow, and the shell 

 measures about 8 millimeters. A specimen from 

 Campeche Bank, latitude 23°18', longitude 87°02', 

 is the only one from the Gulf. 



Cryptopora gnomon Jeffreys 



Cryptopora gnomon Jeffreys. Nature, Dec. 2, 1869, 

 p. 136. 



This is the only member of the Rhynchonel- 

 lacea known from the Gulf of Mexico. It can be 

 recognized by its small size (2 to 3 mm. long), 

 rounded triangular outline, sharply pointed beak, 

 and glossy, translucent shell. The interior of the 

 brachial valve has a high median septum. It 

 occurs off Cape San Bias in gray mud at 196 

 fathoms; also, at 210 fathoms off the Mississippi 

 River. 



Chlidonophora incerta (Davidson) 



Megerlia ? incerta, n. sp., Davidson. Proc. Roy. Soc, 

 vol. 27, 1878, p. 438. 



This shell may be recognized by its nearly 

 circular form, nearly white color, and finely 

 ribbed surface. It has an unusually long pedicle 

 with frayed end. Inside the brachial valve the 

 loop forms an incomplete ring. The species is a 

 deep-water form in most of its known occurrences. 

 It was taken at 1,181 fathoms in the Gulf between 

 the delta of the Mississippi River ana Cedar 

 Key. 



TerebratuUna cailleti Crosse 



Terehratulina cailleti Crosse. Jour. Conchyl., vol. 13, 

 1865, p. 27, pi. 1, figs. 1-3. 



Small, oval, pale yellow in color, and finely 

 ribbed are features characterizing this species. 

 The ribbing at the beak and umbo is somewhat 

 beaded. The interior of the brachial valve is 

 provided with a stout loop in the form of a ring 

 attached to two short descending branches. It 

 was taken in 399 fathoms off Arrowsmith Bank, 

 Yucatan; also, 640 fatiioms m Yucatan Strait. 



Gryphus cubensis (Pourtal^s) 



Terebratvla cubensis Pourtales. Bull. Mus. Conip. Zool., 

 Harvard, vol. 1, No. 6, 1867, p. 109. 



This is a large brachiopod which attains a 

 length of over 45 millimeters. It is generally 

 yellowish in color and has a somewhat triangular 

 outline. The anterior margin is rectimarginate. 



The brachial valve has a short loop consisting of 

 two descending lamellae and a narrow connecting 

 band. Taken at 119 fathoms, latitude 26°31', 

 longitude 85°03' (Harvard collection). National 

 Museum specimens without specific data. 



Gryphus bartschi Cooper 



Gryphus bartschi Cooper. Smithsonian Misc. Coll., 

 vol. 91, No. 10, 1934, pi. 1, figs. 1-8. 



This species is smaller than G. cubensis (Pour- 

 tales), has a smaller foramen, and is less triangular 

 in outline. It is of an orange-yellow color. It is 

 from Bay of Florida and was taken at 101 fathoms. 



Gryphus bartlettii (Dall) 



Terebratula bartlettii Dall. Ainer. Naturalist, vol. 16, 

 1882, p. 885. 



Large size, white or salmon color, and a strongly 

 and broadly plicated anterior commissure dis- 

 tinguish this species from the others. No definite 

 locality in the Gulf is recorded by Dall. 



Argyrotheca barrettiana (Davidson) 



Argiope barrettiana Davidson. Proc. Zool. Soc, Feb. 

 1866, p. 103, pi. 12, fig. 3. 



This is a small brachiopod (about 9 mm. wide) 

 but an unusually beautiful species. It is some- 

 what rectangular in outline, wider than long, and 

 with 20 strong, rounded radial costae. Most dis- 

 tinctive of the species is its coloration. The ele- 

 vated costae are pale, straw-yellow, but the inter- 

 spaces are crimson. It has been taken at 101 

 fathoms in the Gulf but the e.xact locality not 

 recorded. 



Argyrotheca lutea (Dall) 



Cistella lutea Dall. Bull. Mus. Cotnp. Zool., Harvard, 

 vol. 3, 1871, p. 20, pi. 1, figs. 5, 5a; pi. 2, figs. 4-8. 



This species is somewhat less transverse than 

 the preceding and differs in its straw-yellow color. 

 It has been taken from 30-40 fathoms off Tortugas. 



Argyrotheca schrammi (Crosse and Fisclier) 



Argiope schrammi Crosse and Fischer. Jour. Conchyl., 

 vol. 14, 1860, p. 269, pi. 8, fig. 6. 



Argyrotheca schrammi is a small species (about 

 5 mm. wide) with about 10 strong, rounded costae 

 which are opposite on each valve, thus forming a 

 scalloped edge. Specimens may be uniformly red 

 but also may be marked like A. barrettiana. Ones 

 so marked are termed A. schrammi rubrotincta 

 (Dall) . The species is reported from ofl^ Tortugas 



