Filograna implexa Berkeley, 1828 



Filonnuia iiHpU'.m. - Fauvel, 1927: 376, Fig. 129 

 a. b. - Day. 1967: 817. Fig. .38.7. a-h. - 

 Zibrowius. 1968: 179, pi. 10: Fig. 1-12. 



Sdlmarind di/stcri. - Fauvel, 1927: 377, Fig. 129 

 c-k. -Hartman. 1951: 120. 



Rcciirds. — Cape Hatteras to South Carolina, 

 intertidal to 20 m (11, 13. 14. 18, *). 



Dlstfihiition. — Cosmopolitan in temperate and 

 tropical sea.s; intertidal to over 100 m. 



Pomatoceros americonits New Species 



FiKUif ISa-f 



Poniafdccros caeriilciis. - Well.s and Gray, 1964: 

 74 {iKHi Schmarda). 



Ponidtoro-os triquetcr. - McCloskey, 1970: 26 

 (//(*;/ Linnaeu.s). 



Ponnitoce )•<>.'< n. sp. - Day, Field, and Mont- 

 gomery, 1971: 123. 



H<'li>t!ipc.—\JSNM 43131: ca. 100 paratype.s, 

 USNM 43132. 



Descriptio)! . — Tube (Figure 18a) pinki.sh 

 white, triangulai' in section; median ridge 

 smooth and projecting as a tooth over aperture. 

 Body up to 18 mm long. Branchial crown formed 

 of two arcs of 12-15 radioles united by a web for 

 one-third their length. Radioles with two blue 

 bands when fresh. Opercular stalk blue, triangu- 

 lar basally but flattened and broader distally, 

 with a pair of smooth narrow wings below oper- 

 culum. Operculum (Figure 18c, d) swollen, apex 

 conical, and calcareous resembling a Phrygian 

 cap; some paratypes with operculum covered 

 by a flattened calcareous plate (Figure 18b). 



Collar incised ventrolaterally forming paired 

 lateral lobes and a median ventral lobe with 

 small fillets in incisions. Lateral lobes extending 

 back as thoracic membranes to end of thorax 

 and united ventrally as a small apron at origin 

 of abdomen. Collar .setae as a few, small limbate 

 capillaries. Notosetae of setigers 2 to 7 as larger 

 limbate capillaries. Thoracic neurosetae as long 

 rows of uncini; individual uncini (Figure 18f) 

 with one row of about 12 teeth preceding a broad 

 emarginate gouge. Abdominal neurosetae elon- 

 gated on posterior segments but all with a den- 

 ticulate apex produced as a spike on one side 

 (Figure 18e). 



R(ni(n-ks. — Pomatoceros americainiN differs 

 from the European P. triqueter mainly in the 

 shape of the operculum. Tricorn projections 

 which often occur on the opercular plate of 

 P. triqueter. are absent in P. (inierirai/ns, and 

 conical cap with its rectangular talon, when 

 well developed, is very characteristic. Speci- 

 mens of P. triqueter. kindly loaned to me by 

 Dr. George of the British Museum, do not show 

 this character. 



P. aDicricaiiiis has been confused with P. 

 caei-iilciis (Schmarda), originally described 

 as PlacoxtefjKs cae)-iileiis from the Cape of 

 Good Hope and New Zealand. As shown by 

 Day (1955), the Cape form is a distinct species 

 which lacks collar setae and is now known as 

 Ponnttdleios k)viissii (Baird); the New Zealand 

 form of P. (■(teriileiis has an operculum with two 

 tiers of plates and has not been recorded with 

 certainty from America. P. aniericaiiits has also 

 been confused with Pt})}iat()lei(>s caenilesceuN 

 Augener, from the Gulf of Mexico and Poniuto- 

 ceros niiiiutHs Rioja recorded from both coasts 

 of Mexico and by Zibrowius (1969) from Brazil. 

 A discussion of these species will be found in 

 Zibrowius (1970b: 15). P. i)U)iut)is differs from 

 P. oDieiicaiiHs in havinga tube with three ridges, 

 in its smaller size (maximum length 6 mm), only 

 five or six radioles to each branchial lobe, an 

 operculum with a bilobed calcareous plate, 

 and thoracic uncini with a bifurcated gouge. 



Riciirds. — Abundant on corals and Pecteii 

 .shells in 18-40 m off Beaufort (19, 20, 21, *). 



Dist)-ihiiti())i. — I am indebted to Dr. H. Zibrow- 

 ius for the following extension of range: off 

 Sapelo Island, Ga., in 34 m; south of Tortugas, 

 Fla.. in 75 m; Gulf of Mexico, lat 29°25'N, long 

 88 40'W in 40 m. 



Serpula vermiculoris granulosa 

 Marenzeller, 1884 



Serpula f/iruiidosa. - Marenzeller, 1884: 19. pi. 



4: Fig. 1. 

 Serpula rernueiihiris. - McCloskey, 1970: 26. 



Description. — Tube pinkish white, circular in 

 section, faintly ridged. Body 20 mm long. Oper- 

 cular stalk smooth and wingless; operculum 

 (Figure 18g) as a shallow funnel formed of 20-40 

 radii with blunt tips; inner surface of funnel with 



131 



