200 SYSTEMATIC ARRANGEMENT 



36. A. Dumortieri, t. 147. f. 3. 



37. A. limacina, t. 151. f. 2. 



38. A. Rissoana. Dolabella Lepus, Risso, VEnrop. Mend, t. . f . . 



39. A. Neapolitana, t. 3. f. 2. 



Lingual membrane of Aplysia depilans broad, short, brown. 

 Teeth brown, many on each diverging cross series ; central tooth 



Fig. 113. — Teeth of Aplysia punctata. 



0^t, 



H 



% 



distinct and truncated, triangular, dilated beneath, with an arched 

 front edge ; apex truncated, reflexed ; reflexed part subcordate, dark, 

 with three large toothlets in front - p lateral teeth 12*12, in an 

 oblique line, rather elongate, oblique, with the tip recurved, with 

 three rounded lobes on its lower edge ; the crown of the anterior 

 teeth worn, so as to leave the reflexed and lobed part. 



Central tooth of Aplysia punctata with the base on each side ex- 

 panded ; apex recurved, with one sharp point lobed on both sides ; 

 lateral teeth about thirteen, minute, claw-like, denticulated, lobed 

 and toothed at the bend; outer ones misshapen (fig. 113). — Loven. 



*** Sides not dilated. Foot narrow. Shell none. 



4. NoTARCHUS. 



Animal ovate ; hinder tentacles simple. Foot linear, narrow. 

 Shell none. 



1. N. Cuvieri, t. 53. f. 3, t. 152. f. 3, t. 153. f. 1, 3. 



2. N. gelatinosus, t. 61. f. 2, t. 153. f. 2. 



3. N. punctatus, t. 153. f. 5. 



4. N. ocellatus, t. 152. f. 2. 



5. ?N. (Bursiris) griseus, t. 198. f. 8. 



5. BURSATELLA. 



Animal globular, bearded; hinder tentacles branched. Shell 

 none. 



1. B. Leachii, t. 150, t. 153. f. 4. 



2. B. laciniatus, t. 152. f. 1. 



3. B. Pleii, t. 151. f. 1. 



6. ACLESIA. 



Animal elongate, tapered behind, bearded. Tentacles linear, 

 papillary. Lips elongate, dilated on the sides. 



1 . A. longicauda, t. 151. f. •. 



1. \. undata. ♦ 152. f. 5. 



