156 BULLETIN OF THE 



penis in Gouldiana is stout, long, and twisted back, circularly wriukled 

 with a small pointed appendage at the tip. In Stearnsii the penis is broader 

 and shorter, fokled under and backward, and shaped like the distal end of a 

 flattish bean-pod, transversely striated and thicker on its anterior than on 

 its hinder edge. In Stearnsii there are two appendages like tentacula at the 

 posterior end of the siphonal fold, one on each side, which must project forward 

 when the animal is expanded ; in Gouldiana there is a median ridge in the 

 gutter of the siphonal fold, which projects more and more as one follows it 

 backward, and at its posterior end has a single appendage, shorter and broader 

 than the lateral appendages of Stearnsii, which last has no median ridge in the 

 fold. There is something like this ridge in the siphonal fold of Turhinella 

 pyrum. 



In Stearnsii the siphonal fold when developed by the animal must resemble 

 that of Cymhiola hrasiliana as figured by H. and A. Adams (Gen. Eec. Moll., 

 pi. xviii. fig. 1), and the rest of that figure would do very well for the soft parts 

 of Scaphella Stearnsii except in two particulars. The first is, that the flap, 

 upon the anterior outer corner of which the eyes are situated, ceases a little 

 distance behind the eye, and its outer edge rounds inward to the body wall. 

 The second is, that between the tentacula and separated from them by a deep 

 notch on each side is a broad flap or veil, very thin and rounded in front with- 

 out indentation. From under this the stout long proboscis is extruded. This 

 flap in a contracted state is as long as the tentacles. The teeth are precisely 

 like those of Scaphella scapha L., as figured by various authorities (Troschel, 

 Gebiss der Schnecken, Bd. II. pi. v. fig. 3). 



In A urinia Gouldiana the front of the head is somewhat different. The eye 

 flaps are small and subtriangular, instead of rounded rectangular. The tenta- 

 cles are proportionally flatter, larger, and longer, and are divided from the veil 

 by only a slight notch. The veil itself is divided into two lobes by a deep 

 median fissure, and these lobes have each a sort of blunt point in the middle in 

 front. I was unable to discover any radula after careful search. There cer- 

 tainly was no sign of it in its proper place. 



It will be seen from these observations, that, so far as the head and foot are 

 concerned, A urinia is very much like Lyria. The siphonal fold, penis, and 

 operculum differ; the last being wholly absent in Aurinia. From Scaphella 

 proper it is also separated by marked diff'erences of the soft parts. I hope 

 that in time I shall be able to examine the soft parts of V. junonia. The late 

 Colonel Jewett told a story, which might well make a conchologist shudder, of 

 coming upon a Floridian " Cracker," by the beach, just as he had broken the 

 roasted shell of a fine V. junonia, and was about to swallow the contents ! 



Genus MITRA Lamarck. 



The Mitre-shells of the "West Indies have never been revised, though a list 

 of the species known or supposed to belong to the fauna was included by Krebs 

 in his Catalogue, and the species referred to in the general literature w^ere 



