160 Dr. A. Philippi on the genus Serpula. 



6. EuPOMATUSj Ph. 



1, E. uncinatus. Ph., testa tereti, transversim rugosa. Diam. 1"". 

 Animal fuscescens ; branchiarum albarum, fusco-fasciatarum filis 



utrinque 13; margine operculi inciso-dentato ; cornubus octo ; 



apice incurvo uncinatis. (Fig. Q.) 



Not rare. Delle Chiaje, ' Memorie/ vol. iii. t. 48. fig. 21, 

 figui'es a perfectly similar auimal with two opercula, but calls it 

 Sahella euplaana, and asserts that its shell consists of grains of 

 sand ! ! 



2. E . pectinatus , Ph., testa tereti, transversim rugosa, lineisque lon- 

 gitudinalibus obsoletis. Diam. ^"". 



Animal fulvum ; branchiarum filis utrinque decern, punctis coccineis 

 ornatis ; operculi margine crenato ; cornubus duodecim, rectis, 

 utrinque pectinatis, dentibus tribus acutis. (Fig. R.) 

 A specimen which I examined possessed two perfectly similar 



opercula. 



7. Spirorbis, Lamk. 



1. Sp. Cornu Arietis, Ph., testa spirali, tereti, concentrice striata; 



anfractu ultimo reliquos abscondente. Diam. totus gyri 4"". 

 Animal pallide aurantiacum, branchiarum albarum filis utrinque qua- 



tuor ; operculo oblique, subspathulato, in parte postica appendice 



brevi aucto. (Fig. S.) 



The operculum is placed obliquely on the petiole as in^ Cymo- 

 spira ', the inferior or hinder margin is thicker, and supports a 

 short, weak, bifid appendage ; the upper or anterior margin is 

 thin and simple. Spirorbis nautiloides, Lamk., is extremely com- 

 mon; I have not however had occasion to examine the animal. 



8. FiLOGRANA, Berkeley. 

 I have not been able to observe the animal of this section. 

 According to the short notice, without any statement respecting 

 the source, in Lam. ' Hist.^ &c. ed. 2. v. p. 621, "le nombredes 

 appendices tentaculau'es est de huit, dont deux garnis d\in oper- 

 cnle infundibuliforme." Are there really eight tentacular appen- 

 dages instead of two ? That would be highly remarkable. Or 

 are the other six appendices tentaculaires the branchiae ? 



9. Protula, Risso {ex emendatione Cuvieri) . 



1. Pr. intestinum,'L'd.mk., testa magna, tereti, undato-torta, laevi, pri- 



mum repente, deinde libera. Diam. 5"". 

 Animal (secundum Cuvier) branchiis aurantiacis. 



Rare. I have never been able to obtain the animal. The sjrn- 

 onyma are : Serpula intestinum, Lamk., no. 3 ; Delessert, Recueil, 

 1. 1. fig. 7. bene. — Protula Rudolphii, Risso, Hist. Eur. Merid. iv. 

 p. 406. [Risso' s description is so different from Cuvier 's state- 



