p. areiioaiiH Kinberg and P. ovica irehstcri 

 described below) have all the neuropodial hooks 

 annulated and at least the anterior ones bi- 

 dentate. The skin papillae are in longitudinal 

 rows, and the whole surface is encrusted with 

 sand. I believe that Ehlers' "other specimen" 

 does not refer to the same species as the rest 

 of his description of S. caribou ni but only a 

 reexamination of Ehlers' specimens can settle 

 this. In the meantime, it is safer to give the 

 Beaufort specimen a new name. 



Records. — On corals off Beaufort in 18 m 

 (20, *). 



Distril)i(tiu)i. — Florida (Key West). 



Notes on the genera Piromis Kinberg. 1867 

 and Pherusa Oken, 1807 



Since Plunim eruca has been recorded from 

 Cape Hatteras by Wells and Gray (1964) and 

 this species has many characters which suggest 

 that it is allied to Trophonia aroiosa Webster, 

 from Virginia and PI)-oi)iis areiiosiis Kinberg, 

 the type species of the genus from South Africa, 

 it was necessary to examine the three more 

 carefully. Dr. David George of the British Mu- 

 seum kindly sent me specimens of Trophonki 

 crucn Claparede from Naples, which is the type 

 locality, and Dr. Marian Pettibone sent me the 

 specimen from Pamlico Sound identified by 

 Wells as Pheruaa eruca, as well as the two 

 syntypes of TropJwnia arenoxa Webster from 

 Virginia. Many specimens of Piromis arciiosa 

 Kinberg were available in my own collections 

 in the University of Cape Town. 



It may be said at once that Wells' specimen 

 from Pamlico Sound is not a flabelligerid at all. 

 It has had its head removed, but obviously 

 belongs to the family Poecilochaetidae. 



The genus Pironiis (synonym: Seniiodcrit 

 Chamberlin), is characterized by having the 

 branchial filaments arising from the surface of 

 a tongue-shaped lobe in two series each with 

 many irregular rows, whereas Pherusa has one 

 series of branchial filaments arising from the 

 edge of a semicircular hood above the cephalic 

 ridge. In addition, Piro))iis aroiosxs has biden- 

 tate neuropodial hooks, a sandy crust covering 

 the body, and relatively few skin papillae, those 

 on the dorsum and ventrum (but not the para- 

 podia) being arranged in a few longitudinal 

 rows. These characters are shared by Truphoiiid 



criica Claparede and Troplioiiia aroinsa Web- 

 ster, both of which have been referred to the 

 genus PhcrKsa, while many other species of 

 Phcriisa have unidentate neuropodial hooks, 

 numerous scattered skin papillae, and no sandy 

 crust. As will be shown, both Tropluoiia cnica 

 and T. areuosa. when dissected, proved to have 

 the branchial filaments arranged in multiserial 

 rows on a tongue-shaped lobe. They are in fact 

 species of Piromis. Thus the genera Piromis and 

 Phcriisa may be distinguished not only on the 

 origin of the branchial filaments, but al.so on 

 the bidentate or unidentate neuropodial hooks 

 and the arrangements of the skin papillae. 

 Further, Piromis is covered by a sandy crust, 

 while most species of Phcriisa are not; Phcria^a 

 ehUrsi described above is intermediate. 



Piromis eruca (Claparede. 18(i9) 

 New Combination 



Tropiioiiia criicu Claparede, 1869: 105, pi. 15: 



Fig. 2. 

 Sti/larioidcs eruca. - Fauvel, 1927: 119, Fig. 42 



h-1. 



(Noil) Pliiriisd eruca. - Wells and Gray. 1964: 

 74. 



Material c.ramiiicd. — The following descrip- 

 tion is based on two specimens of Trophonia 

 eruca kindly sent me by Dr. David George of 

 the British Museum. They were collected at 

 Naples (the type locality of T. eruca) and identi- 

 fied by Mcintosh and the registration number is 

 1921:5:1:2651/2. Both were brown in alcohol, 

 the palps and branchial filaments are missing, 

 and many of the setae are broken. 



Description. — Body up to 60 mm long with 

 73 segments. Surface covered with a sandy 

 crust, well marked dorsally but indistinct ven- 

 trally. Skin papillae long, knobbed, and pro- 

 jecting through the .sand. Papillae arranged in 

 longitudinal rows, two rows dorsally and two 

 ventrally and groups of about six papillae around 

 each bundle of setae, those around neurosetae 

 extending ventrally. No scattered papillae. Buc- 

 cal apparatus including a pleated lip around 

 mouth, a pair of large grooved palps, and a 

 dorsal tongue-shaped branchial lobe with an 

 indistinct median cephalic ridge. Four close-set 

 eyes. Branchial filaments in irregular rows in 

 each group. Cephalic cage poorly defined but 

 including forwardly directed capillaries of seti- 



108 



