POMATOCERUS. 361 
Delle Chiaje’ (1841) figures an empty tube of S. vermicularis under the title of Serpula 
infundibulum. 
The Serpula Philipp, Morch, S. aspera, Philippi, as well as S. infundibulum, Delle 
Chiaje, as described by Lo Bianco (1893), seem to be closely related, if not identical, with 
the present species. 
It is possible that the S. rugosa of Turton’ and the Vermilia scabra of Lamarck’ may 
refer to the young of S. vermicularis. 
-Claparéde’s (1868) Serpula crater* may be included under this species, since the descrip- 
tion and figures most closely resemble it. Fauvel, indeed, after an examination of various 
specimens from the same locality, agrees with this view, and so does Soulier in his revision 
of the Annelids of Cette. 
Langerhans (1880) considers that S. echinata, S. pallida, and also S. aspera of Grube 
pertain to the present species. 
Carus (1885) gives two varieties of this form in the Mediterranean, viz., S. Philippi, 
tube rounded, free, and S. contortwplicata, with a triquetrous fixed tube. 
Pruvot (1885) shows four cerebral ganglia in Serpula Philippi (S. vermicularis), but they 
differ from those of Sabella penicillus in so far as the anterior ganglia are large and ovoid, 
the second pair being smaller and situated posteriorly. 
De St. Joseph mentions the var. S. echinata from Cannes (similar to what Grube? found), 
the crenulations on the border of the operculum being less distinct than in the ordinary 
form. The same author (1894) points out that in the dorsal region of the branchia in section 
are two transparent glandular pouches in the form of elongated sacs and separated by brown 
granules. In reality they are two trenches or grooves with their muciparous cells, which 
resemble cartilage when viewed wn siti: as a transparent object. He observes that Marenzeller 
confounds this form with S. Philipps, Morch, and Langerhans confuses it with S. pallida, 
Phil., the S. echinata, Gm., the S. aspera, Phil., and the S. octocostata, Quatref. The S. 
vermicularis of O. F. Miller is a Hydroides, whilst that of Cuvier is a Pomatocerus. 
Rioja’s (1917) Serpula Lo Branci, n. sp., needs further investigation, and appears to be 
only a variety, and the same may be said of the Serpula concharum of Langerhans. 
Genus CLXXX.—Pomarocerus, Philippi, 1844. 
The dorsal part of the cephalic collar forms a large free lamella, continuous with the 
broad ventral part, which is often reflected and joins the alar membrane of the front. Bran- 
chize in two lateral fans, the filaments ending in subulate processes of some length. Pinnze 
comparatively short. Operculum springs from the dorsal edge of the left fan, a flattened 
cushion, with an ear-like process at each side, bearing the calcareous tip, which may have 
1 “Deserizione,’ pl. 1xxi, fig. 40. 
* “Conch. Dict.’ 
$ luiamarck. An. s. Vert., v, p. 362. 
+ “Annél. Neap. Suppl.,’ p. 161, pl. xin, fig. 2. 
» € Jahresb. Schles. Gesellsch.,’ 1861, Breslau, 1862, p. 62. f 
