MOLLTTSCA. 89 



Length of animal 17 millim., diam. 7 ; length of shell, from 

 nucleus to opposite end, 4J. 



Hob. Port Jackson (Goppinger). 



This may be the P. delicatus of Pease, but there appear to be 

 certain differences in the shells of the two forms which may be of 

 specific value. 



127. Dolabella rumphii. 

 Cuvier, Ann. du Mus. v. p. 437, pi. 29. fig. 1. 



Hah. N.E. Australia ( Goppinger) ; Moluccas (Bumphius) ; Timor 

 {Peron) ; Waigiou {Quay and Gaimard) ; Mauritius {Bang and von 

 Martens), 



There is no indication of any caudal prolongation in the specimen 

 before me, the hinder end. being (in spirit) very broad and obtusely 

 curved. 



The shell agrees with the figure given by Eang (Hist. Nat. des 

 Aplysiens, pi. 1). 



128. Aplysia sparsinotata. 



Animal of a pale colour in spirit, varied with a few dark distant 

 dots along the sides, caudate posteriorly. Middle of back between 

 the mantle-lobes in front of the shell, also the inner surface of the 

 anterior portion of the lobes themselves, exhibiting irregular brown- 

 ish patches. Lobes commencing a short distance behiud the dorsal 

 tentacles, and terminating behind at about the same distance from 

 the end of the body. Oral tentacles moderately large and long; 

 posterior conical, acuminate, not far apart. 



Shell elongate, rather beaked behind, sharply arcuate in front, 

 15 millim. long, 10 broad. Animal about 45 in length. 



Hab. Same as A. piperata. 



129. Aplysia piperata. 



Animal (in spirit) olivaceous, minutely and closely dotted every- 

 where, with the exception of the ■ foot, with black ; hinder third 

 part of the body sometimes paler than the rest, from which it is 

 marked off by a blackish band passing right round the animal. 

 Lobes of the mantle narrowish in front, where they arise quite close 

 to the posterior tentacles, considerably dilated behind. Oral ten- 

 tacles large, long, and pointed; posterior small, close together, 

 conical. 



Shell white, concave within, subquadrate. Length 27 miUim., 

 width 22. Animal about 80 long. 



Hab. Thursday Island, Torres Straits, 4-5 fms., sandy bottom. 



Peculiar on account of the position of the posterior tentacles, close 

 to the origin of the mantle-lobes. 



130. Aplysia denisoni. 



' Body (in spirit) high, exhibiting a distinct pedal disk, produced 

 posteriorly into a caudal termination. The entire surface wrinkled, 



